Single Bit (delta) Patents (Class 375/247)
  • Patent number: 10848174
    Abstract: A digital filter and a method for filtering a pulse density modulation (PDM) signal are presented. The digital filter has a first filter circuit to receive an input signal with input values at successive time steps to provide a filtered input signal with filtered values at successive time steps. The digital filter does not require sample-rate or data format conversions. Also, the digital filter is area and power efficient when implemented in hardware. Optionally, the digital filter has a sigma-delta modulator including the quantiser, the sigma-delta modulator being used to receive the filtered input signal and to process the filtered input signal before and/or after being quantised by the quantiser. This digital filter does not require sample-rate or data format conversions. This digital filter is area and power efficient when implemented in hardware.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: November 24, 2020
    Assignee: Dialog Semiconductor B.V.
    Inventors: Ashley Hughes, Wessel Harm Lubberhuizen
  • Patent number: 10296032
    Abstract: A bandgap reference circuit includes a first bipolar junction transistor (BJT) in series with a first current generator, the first BJT and the first current generator configured to produce a first proportional to absolute temperature (PTAT) signal. The circuit also includes a second BJT in series with a second current generator, the second BJT and the second current generator configured to produce a second PTAT signal. The bandgap reference circuit maintains a current through at least one of the first BJT or the second BJT within a constant ideality factor region of the at least one of the first BJT or the second BJT.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: May 21, 2019
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Jaw-Juinn Horng, Kuo-Feng Yu, Chung-Hui Chen
  • Patent number: 10256959
    Abstract: A method for generating a tone signal (TS) having a tone frequency, f, wherein the method comprises the following steps: supplying (S1) a binary bit stream (BBS) having a mark pattern with a supply bit rate, BR, to a signal filter unit; and filtering (S2) the supplied binary bit stream (BBS) by said signal filter unit to generate the tone signal (TS), wherein the mark pattern of the binary bit stream (BBS) supplied to said signal filter unit is adapted to minimize a ratio of the supply bit rate, BR, to the tone frequency, f, of the generated tone signal (TS).
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 9, 2019
    Assignee: ADVA OPTICAL NETWORKING SE
    Inventor: Michael Eiselt
  • Patent number: 10225577
    Abstract: The present invention presents fully noncausal predictive encoding and decoding methods for image, video and other signal coding. The presented noncausal predictive image coding methods largely reduce the prohibitive computational cost of the prior invention. The presented noncausal signal encoding method comprises: (1) splitting the source signal into a plurality of noncausal coding units; (2) extending each noncausal coding unit with the selected extension type; and (3) encoding each noncausal coding unit with the selected intra-unit noncausal predictor and intra-unit noncausal predictive encoding method.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: March 5, 2019
    Inventor: Shidong Chen
  • Patent number: 10135541
    Abstract: An analog-to-digital converter can produce a digital signal representative of an analog input electrical signal. An optical amplitude modulator can modulate an input optical pulse train using the analog input electrical signal to produce a first modulated optical pulse train. An optical splitter can split the first modulated optical pulse train into a plurality of modulated optical pulse trains. A plurality of detectors can convert the plurality of modulated optical pulse trains into respective modulated voltage pulse trains. A plurality of comparators and a decoder, arranged in a flash converter topology, can receive the modulated voltage pulse trains and output the digital signal representative of the analog input electrical signal using a timing reference derived from the input optical pulse train. Using a relatively high-precision input optical pulse train, such as a Kerr Comb, can produce a relatively high-accuracy analog-to-digital converter.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: November 20, 2018
    Assignee: Raytheon Company
    Inventors: Bishara Shamee, Steven R. Wilkinson, Makan Mohageg
  • Patent number: 10110246
    Abstract: Disclosed are three methods for precise measurement of frequency deviation of known nominal frequency. Delta adder method (DA), comprising of delta-sigma modulator, delta-adder, delay line, low-pass filter, and zero crossing detector. The second method (DA+RE), comprising of delta-sigma modulator, circuit for squaring delta-sigma bit-stream, delta-adder, low-pass filter, and zero-crossing detector. The third method comprises of reference delta-sigma modulator for synchronization of two or more dislocated frequency sources of known nominal frequency.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: October 23, 2018
    Inventor: Djuro G. Zrilic
  • Patent number: 10062391
    Abstract: To prevent that the noise occurs at timing switching between PCM data and DSD data by a simple configuration. An AV receiver 1 includes a mute circuit 5 that mutes output from a DAC 4, a detection circuit 6 that detects that a digital audio signal is zero data and supplies a detection signal, a microcomputer 2 that supplies a control signal at timing switching from PCM data to DSD data before switches from PCM mode that the DAC 4 converts PCM data into an analog audio signal to DSD mode that the DAC 4 converts DSD data into the analog audio signal, and an AND circuit 7 that activates the mute circuit 5 in case that the detection signal from the detection circuit 6 and the control signal from the microcomputer 2 are supplied.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: August 28, 2018
    Assignee: Onkyo Corporation
    Inventor: Kuniaki Yamamoto
  • Patent number: 9918172
    Abstract: An electronic system, in some embodiments, comprises: a power source; a load coupled to the power source; an analog-to-digital converter, coupled to the power source and the load, that samples a fluctuating voltage supplied by the power source and generates a digital representation of said fluctuating voltage; control logic, coupled to the analog-to-digital converter, that generates an amplitude correction signal based on said digital representation of the fluctuating voltage and on a target voltage; correction logic, coupled to the control logic, that uses the amplitude correction signal and an audio signal to generate a switch control signal; and an output driver, coupled to the correction logic, that controls coupling between the power source and the load based on the switch control signal.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: March 13, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Ivo Leonardus Coenen, Alexander Heubi
  • Patent number: 9673845
    Abstract: A mixing stage includes a first modulation stage that receives an input signal from a first common node of the mixing stage, a first local oscillator input that receives a local oscillator signal, and a first modulation signal output adapted to provide a first modulated signal. A second modulation stage of the mixing stage includes a second input that receives a phase inverted representation of the input signal from a second common node of the mixing stage, a second local oscillator input that receives the local oscillator signal, and a second modulation signal output adapted to provide a second modulated signal. A current generation circuit provides a supply current to the first common node and to the second common node. A current control circuit is adapted to superimpose an offset current to the current of at least one node of the first common node and the second common node.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: June 6, 2017
    Assignee: Infineon Technologies AG
    Inventors: Saverio Trotta, Herbert Knapp
  • Patent number: 9467233
    Abstract: Methods and systems for stabilizing a resonant modulator include receiving pre-modulation and post-modulation portions of a carrier signal, determining the average power from these portions, comparing an average input power to the average output power, and operating a heater coupled to the modulator based on the comparison. One system includes a pair of input structures, one or more processing elements, a comparator, and a control element. The input structures are configured to extract pre-modulation and post-modulation portions of a carrier signal. The processing elements are configured to determine average powers from the extracted portions. The comparator is configured to compare the average input power and the average output power. The control element operates a heater coupled to the modulator based on the comparison.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: October 11, 2016
    Assignee: Sandia Corporation
    Inventors: Anthony L. Lentine, Jonathan Albert Cox
  • Patent number: 9344045
    Abstract: An amplifier includes a differential input with a positive and a negative input and an analog integrator with a differential integrator input and a differential integrator output. The analog integrator further includes an operational amplifier with a positive operational amplifier input, a negative operational amplifier input, a positive operational amplifier output and a negative operational amplifier output. The differential integrator input is coupled to the differential input. A ternary pulse width modulator includes two modulator inputs coupled to the differential integrator output and two modulator outputs. A first feedback path is coupled between a first of the two modulator outputs and the positive operational amplifier input and a second feedback path is coupled between a second of the two modulator outputs and the negative operational amplifier input. A first divert capacitor is coupled between the positive operational amplifier input and a constant voltage reference.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: May 17, 2016
    Assignee: Intel Mobile Communications GmbH
    Inventors: Georgi Panov, Rinaldo Zinke
  • Patent number: 9264078
    Abstract: The invention discloses a transmitter comprising a pulse encoder for creating pulses from the amplitude of an input signal to the transmitter, a compensation signal generator for cancelling quantization noise caused by the pulse encoder, a mixer or I/Q modulator for mixing an output of the pulse encoder with the phase of an input signal to the transmitter and an amplifier for creating an output signal from the transmitter. In the transmitter, a control signal (CA) for controlling a function of the amplifier comprises an output signal from the compensation signal generator, and an input signal to the amplifier comprises an output from the mixer having been modulated to a desired frequency.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: February 16, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Ulf Gustavsson, Johan Thorebäck
  • Patent number: 9166616
    Abstract: A signal conversion method including converting an input signal into a 1-bit pulse train representing an analog signal is provided. The 1-bit pulse train has a pulse rising waveform frise and a pulse falling waveform ffall. The pulse rising waveform frise includes a first distortion component with respect to an ideal pulse rising waveform, and the pulse falling waveform ffall includes a second distortion component with respect to an ideal pulse falling waveform. The first distortion component and the second distortion component are substantially line-symmetric with respect to a time axis.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: October 20, 2015
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Takashi Maehata
  • Patent number: 9154149
    Abstract: An input stage for an A/D converter includes a transconductance element adapted to receive, at a first input of the transconductance element, an analog input signal that is to be converted to a digital signal by the A/D converter, a feedback path for providing an analog feedback signal to a second input of the transconductance element, the analog feedback signal being based on a digital output signal of the A/D converter, and an integrator for integrating an output current of the transconductance element, wherein the integrating element is adapted to generate an integrator output signal representative of the integrated output current. The input stage may be included in an A/D converter. A plurality of such A/D converters may be included in a system.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: October 6, 2015
    Assignee: NXP B.V.
    Inventors: Robert Hendrikus Margaretha van Veldhoven, Fabio Sebastiano
  • Patent number: 9071268
    Abstract: A processing system may include multiple selectable processing paths for processing an analog signal in order to reduce noise and increase dynamic range. Techniques are employed to transition between processing paths and calibrate operational parameters of the two paths in order to reduce or eliminate artifacts caused by switching between processing paths.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: June 30, 2015
    Assignee: Cirrus Logic, Inc.
    Inventors: Edmund Mark Schneider, Aniruddha Satoskar, Daniel J. Allen, Seyedeh Maryam Mortazavi Zanjani
  • Patent number: 9065472
    Abstract: An interleaved digital to analog converter (DAC) includes at least a first signal path and a second signal path. The DAC further includes at least a first high speed DAC and a second high speed DAC each having an input and an output. The first signal path and the second signal path are electrically coupled to the first high speed DAC input and the second high speed DAC input, respectively. The DAC also includes a zero phase clock signal supplied to the first high speed DAC and a 180° phase shifted clock signal supplied to the second high speed DAC. A summation circuit, having at least two inputs and one output, is coupled to the outputs of the first high speed DAC and the second high speed DACs. A high-pass delta sigma modulator, a low-pass delta sigma modulator, a band pass delta sigma modulator, or notch filter delta sigma modulator is coupled between the first signal path and the first high speed DAC.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: June 23, 2015
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Jamin McCue, Vipul J. Patel, Waleed Khalil, Brian Dupaix, Tony Quach
  • Patent number: 9042462
    Abstract: Transport of differential signals is provided. In one aspect, a telecommunications system includes a first unit and a second unit. The first unit can calculate a differential signal from an original signal. The differential signal can represent a change in signal levels between constant time intervals in the original signal. The second unit can estimate the original signal from the differential signal received from the first unit over a communication medium.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: May 26, 2015
    Assignee: COMMSCOPE TECHNOLOGIES LLC
    Inventor: Van E. Hanson
  • Patent number: 9035812
    Abstract: A modulator and a method are disclosed. The modulator is for generating a band pass signal and comprises: sigma delta modulation logic operable to receive an input signal and to perform at least a 3-level quantisation of the input signal to generate an at least 3-level quantised signal; and requantisation logic operable to requantise the at least 3-level quantised signal to a 2-level quantised signal to be provided as the band pass signal. This approach improves the coding efficiency achieved compared to that possible using a 2-level sigma delta modulator, whilst also providing improved noise performance due to the inherent linearity of the 2-level quantised signal which is provided to drive the switch mode power amplifier. Accordingly, the performance of the modulator is improved by increasing its coding efficiency whilst maintaining its linearity which improves the noise performance in adjacent channels.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: May 19, 2015
    Assignee: Alcatel Lucent
    Inventor: Tomasz Podsiadlik
  • Patent number: 9030339
    Abstract: A transmitting device includes a parallel data generation unit and a transmitting unit. The parallel data generation unit generates first serial data and second serial data from a data packet, converts the first serial data and second serial data respectively into first parallel data and second parallel data, transmits the first parallel data and second parallel data respectively through first and second parallel transmission paths, and performs the transmission of the first parallel data and the transmission of the second parallel data in parallel. The transmitting unit receives the first parallel data and second parallel data respectively through the first and second parallel transmission paths, re-converts the first parallel data and second parallel data respectively into the first serial data and second serial data, and transmits the first serial data and second serial data to a receiving device respectively through first and second serial transmission paths.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yusuke Fujita
  • Patent number: 9026070
    Abstract: A low-power diversity receiver includes at least two receive paths, each of which is designated as a primary or secondary receive path. A primary receive path is compliant with system requirements (e.g., IS-98D requirements). A secondary receive path is not fully compliant with the system requirements and is designed for lower power, less area, and lower cost than the primary receive path. For a multi-antenna receiver, the two receive paths may be used to simultaneously process two received signals from two antennas. For a single-antenna receiver, either the primary or secondary receive path is selected, e.g., depending on whether or not large amplitude “jammers” are detected, to process a single input signal from one antenna. The receiver may include additional receive paths for additional frequency bands and/or GPS.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: May 5, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Charles J. Persico, Kevin Gard, Gurkanwal Kamal Sahota, Shinichi Miyazaki, Steven C. Ciccarelli
  • Patent number: 9014281
    Abstract: A delta-sigma modulator and a transmitter apparatus including the same are disclosed. The delta-sigma modulator includes a first integrator, a second integrator, a first comparator configured to compare an output signal of the second integrator and a reference signal, and output a first comparison signal, a second comparator configured to compare the output signal of the second integrator and the reference signal, and output a second comparison signal, a first DAC configured to output the first signal corresponding to the first comparison signal and the second comparison signal, a second DAC configured to output the second signal corresponding to the first comparison signal and the second comparison signal, a delayer configured to generate a delayed signal that delays the first comparison signal and the second comparison signal by a predetermined time, and an output DAC configured to generate an output signal having a multi-level corresponding to the delayed signal.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: April 21, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Young Kyun Cho, Sung Jun Lee, Seung Hyun Jang, Bong Hyuk Park, Jae Ho Jung, Kwang Chun Lee
  • Patent number: 8995591
    Abstract: A wireless communication device configured for receiving multiple signals is described. The wireless communication device includes a single-chip carrier aggregation receiver architecture. The single-chip carrier aggregation receiver architecture includes a first antenna, a second antenna, a third antenna, a fourth antenna and a transceiver chip. The transceiver chip includes multiple carrier aggregation receivers. The single-chip carrier aggregation receiver architecture reuses at least one of the carrier aggregation receivers for secondary diversity.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 31, 2015
    Assignee: QUALCOMM, Incorporated
    Inventors: Prasad Srinivasa Siva Gudem, Liang Zhao, Jin-Su Ko, Hong Sun Kim
  • Patent number: 8970412
    Abstract: A signal quantizer includes a summing junction, a loop filter, a quantizer and a reconstruction filter. The summing junction is responsive to an input signal and to a modulated signal and is operative to combine the modulated signal and the input signal to generate a summing junction output. The loop filter is responsive to the summing junction output and is operative to generate a loop filter output and has a first regenerative gain associated therewith. The quantizer is responsive to the loop filter output and is operative to generate the modulated signal. The reconstruction filter is responsive to the modulated signal and is operative to generate a quantized output signal and has a second regenerative gain associated therewith that is substantially equal to that of the loop filter.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: March 3, 2015
    Assignee: Invensense, Inc.
    Inventors: Derek K. Shaeffer, Xiang Fang
  • Patent number: 8964860
    Abstract: To provide a digital modulator including: a signal adjuster (105) which is provided with a plurality of output lines, and which outputs, to the output line, which corresponds to a range to which a level of an input signal belongs, a signal of a level corresponding to the level of the input signal; a plurality of internal digital modulators (111-1 to 111-N), each of which is provided so as to correspond to each of the plurality of output lines and carries out delta-sigma modulation on the signal of the corresponding output line to output the modulated signal; and an encoder (113) which encodes the plurality of modulated signals respectively outputted by the plurality of internal digital modulators.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: February 24, 2015
    Assignee: NEC Corporation
    Inventor: Shinichi Hori
  • Patent number: 8890735
    Abstract: A multi-level sigma-delta Analog to Digital converter provides multi-level outputs using a quantizer with reduced quantization levels. The converter comprises a direct path comprising a computation block, an analog integrator and the quantizer with reduced quantization levels. Further, the converter comprises a feedback path arranged to provide to the computation block a feedback analog signal. The direct path comprises a first amplification block having a gain factor which is the inverse of the gain factor of a second amplification block of the feedback path. The converter allows reduction of the complexity of the quantizer.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: November 18, 2014
    Assignee: ST-Ericsson SA
    Inventor: Carlo Pinna
  • Patent number: 8873644
    Abstract: Self-monitoring reset circuitry is presented for use in analog-to-digital converters and other modulator circuitry with capacitively coupled isolation barriers in which the modulator output data is monitored for inactivity by a reset circuit synchronized to the modulator clock, and extra pulses are selectively introduced into the data prior to transmission across the isolation barrier if no modulator state changes occur within a predetermined number of clock cycles to provide a predictable data output value for each end of the analog input range and to reset the output to the correct state in situations where transient noise toggles the output and the modulator output is static.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: October 28, 2014
    Assignees: Texas Instruments Deutschland GmbH, Texas Instruments Incorporated
    Inventors: James Lee Todsen, Caspar Petrus Laurentius van Vroonhoven
  • Patent number: 8855215
    Abstract: A method and a circuit are provided for providing phase or frequency synthesis using sigma-delta modulation bit-stream techniques in which data is encoded utilizing sigma-delta modulation and then digital-to-time conversion (DTC) or digital-to-frequency conversion (DFC). In some embodiments this encoded data stream is further subjected to phase or frequency domain filtering, which in some embodiments is carried out by a higher-order phase-locked loop (PLL).
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: October 7, 2014
    Assignee: The Royal Institution for the Advancement of Learning/McGill University
    Inventors: Gordon Roberts, Sadok Aouini
  • Patent number: 8830107
    Abstract: A frequency translating analog-to-digital converter for receiving an analog band-pass signal is described. The analog-to-digital converter comprises an adder/input block for receiving the analog band-pass signal and an analog band-pass feedback signal, thereby forming an analog band-pass error signal. The analog-to-digital converter has at least one analog mixer for mixing and down converting the analog band-pass error signal and thus generating a down-converted analog error signal and at least one quantization path for generating at least one digital signal.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: September 9, 2014
    Inventor: Udo Karthaus
  • Patent number: 8831125
    Abstract: Some of the example embodiments presented herein are directed towards an eNodeB (401), and corresponding method therein, for providing data transmission in a multiple antenna system. The eNodeB (401) may be configured to receive a plurality of signal quality assessments and a CSI report from a user equipment. Based on the received data the eNodeB (401) may determine a received power difference between the received data. The eNodeB (401) may further determine a beamforming direction for subsequent data transmissions. Based on the power difference, the eNodeB (401) may account for the received power difference in the subsequent data transmissions, thus improving data communications towards the user equipment.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: September 9, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Niklas Wernersson, David Hammarwall, Svante Bergman
  • Patent number: 8803714
    Abstract: A transmitting device includes a parallel data generation unit and a transmitting unit. The parallel data generation unit generates first serial data and second serial data from a data packet, converts the first serial data and second serial data respectively into first parallel data and second parallel data, transmits the first parallel data and second parallel data respectively through first and second parallel transmission paths, and performs the transmission of the first parallel data and the transmission of the second parallel data in parallel. The transmitting unit receives the first parallel data and second parallel data respectively through the first and second parallel transmission paths, re-converts the first parallel data and second parallel data respectively into the first serial data and second serial data, and transmits the first serial data and second serial data to a receiving device respectively through first and second serial transmission paths.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: August 12, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yusuke Fujita
  • Patent number: 8755447
    Abstract: A communications system, e.g., a wireless microphone, incorporates a quadrature modulator system to reduce power consumption with respect to traditional approaches and is general in nature to support any two-dimensional digital technique. The quadrature modulator system comprises different subsystems, including a digital-analog transformation circuit, a baseband filter, and a quadrature modulator. The digital-analog transformation circuit converts discrete time samples to a continuous time signal, and further includes an oversampling noise-shaping modulator such as a sigma-delta modulator. The baseband filter then removes out-of-band energy including sampling images and quantization noise. Some of the circuit components may comprise discrete devices that may result in a reduction of power consumption for the quadrature modulator system. Alternatively, some or all of the circuit components may be incorporated in a single electronic device.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: June 17, 2014
    Assignee: Shure Acquisition Holdings, Inc.
    Inventors: Michael Joseph Goodson, Thomas J. Kundmann, Jeffrey Arthur Meunier
  • Patent number: 8742964
    Abstract: An apparatus includes a capacitance-to-voltage converter circuit configured to be electrically coupled to a micro-electromechanical system (MEMS) sensor circuit. The capacitance-to-voltage converter circuit includes a differential chopping circuit path configured to receive a differential MEMS sensor output signal and invert a polarity of the differential chopping circuit path, and a differential sigma-delta analog to digital converter (ADC) circuit configured to sample the differential MEMS sensor output signal and provide a digital signal representative of a change in capacitance of the MEMS sensor.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: June 3, 2014
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Jonathan Adam Kleks, Ion Opris, Justin Seng
  • Patent number: 8743558
    Abstract: An information handling system device includes a plurality of electronic components; an electric circuit including at least one trace for connecting two or more of the plurality of electronic components and transmitting data between the plurality of electronic components via at least one electric signal; and a substrate including an insulating material for serving as a base for the electric circuit, wherein each of the at least one electric signal transmitted between the plurality of electronic components is transmitted utilizing slope manipulation by manipulating each of the at least one electric signal to provide a slope substantially proportional to a discrete integer data value of n discrete integer data values, n being a positive integer greater than or equal to 3, said discrete integer data value represented by using one of n distinct slopes transmitted utilizing a particular reference voltage of n predetermined reference voltages.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: June 3, 2014
    Assignee: International Business Machines Corporation
    Inventors: Kevin J. Bills, Mahesh Bohra, Jinwoo Choi, Lloyd A. Walls
  • Patent number: 8731410
    Abstract: Methods and systems for split voltage domain receiver circuits are disclosed and may include amplifying complementary received signals in a plurality of partial voltage domains. The signals may be combined into a single differential signal in a single voltage domain. Each of the partial voltage domains may be offset by a DC voltage from the other partial voltage domains. The sum of the partial domains may be equal to a supply voltage of the integrated circuit. The complementary signals may be received from a photodiode. The amplified received signals may be amplified via stacked common source amplifiers, common emitter amplifiers, or stacked inverters. The amplified received signals may be DC coupled prior to combining. The complementary received signals may be amplified and combined via cascode amplifiers. The voltage domains may be stacked, and may be controlled via feedback loops. The photodetector may be integrated in the integrated circuit.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: May 20, 2014
    Assignee: Luxtera, Inc.
    Inventor: Brian Welch
  • Patent number: 8687981
    Abstract: Methods and systems for split voltage domain transmitter circuits are disclosed and may include amplifying a received signal in a plurality of partial voltage domains. Each of the partial voltage domains may be offset by a DC voltage from the other partial voltage domains. A sum of the plurality of partial domains may be equal to a supply voltage of the integrated circuit. A series of diodes may be driven in differential mode via the amplified signals. An optical signal may be modulated via the diodes, which may be integrated in a Mach-Zehnder or a ring modulator. The amplified signals may be communicated to the diodes, connected in a distributed configuration, via even-mode coupled transmission lines. The partial voltage domains may be generated via stacked source follower or emitter follower circuits. The voltage domain boundary value may be at one half the supply voltage due to symmetric stacked circuits.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: April 1, 2014
    Assignee: Luxtera, Inc.
    Inventors: Brian Welch, Daniel Kucharski
  • Patent number: 8670490
    Abstract: A signal transmission apparatus that transmits a 1-bit signal obtained by delta-sigma modulation is provided. In the signal transmission apparatus, a pseudo-random noise pattern having a data rate equal to that of the delta-sigma modulated 1-bit signal is generated, and the 1-bit signal is code-modulated using the generated pseudo-random noise pattern. The generated pseudo-random noise pattern and the code-modulated signal obtained through code modulation are transmitted via a transmission line. The transmitted code-modulated signal is demodulated using the transmitted pseudo-random noise pattern.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: March 11, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Fumihiro Inui
  • Patent number: 8625717
    Abstract: A wireless transmission device of the present invention includes n (where n is an integer of two or more) transmission antennas and a delay imparting section for delaying transmission signals supplied to the n transmission antennas by a maximum delay time (n?1)T or less based on a delay time T dependent upon a communication signal, which indicates whether to transmit the transmission signals by way of frequency diversity or multiuser diversity.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: January 7, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Kimihiko Imamura
  • Patent number: 8625726
    Abstract: A radio frequency to digital receiver has a modulator sampling a signal at a first rate. The receiver has at least one processing unit. The processing unit has a plurality of digital bandpass filters separating the signal and recombining the signal at a rate less than the first rate. The processing unit has a digital down converter adjusting frequency offset or centering the signal at the rate less than the first rate. The receiver has at least one rate control buffer coupled to adjacent processing units when two or more processing units are within the receiver.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: January 7, 2014
    Assignee: The Boeing Company
    Inventors: Yen-Cheng Kuan, Zhiwei Xu
  • Patent number: 8619882
    Abstract: A data modulation circuit has an adder adding an input signal, and an output signal of a memory device; and an output circuit part discriminating and quantizing the output signal of the adder by a predetermined threshold value. The memory device receives and holds the output signal of the adder and a predetermined signal, and supplies the held signals to the adder as an output signal of the memory device.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: December 31, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventor: Uichi Sekimoto
  • Patent number: 8571151
    Abstract: Certain aspects of the present disclosure relate to a method for emulating N-bits uniform quantization of a received pulse signal by using one-bit signal measurements. One method for wireless communications includes receiving a signal transmitted over a wireless channel, wherein the signal comprises a sequence of pulses, applying gain values to the pulses to obtain a binary matrix for each gain value, generating a probability vector for each gain value using the binary matrix obtained for that gain value, and generating an output signal by linearly combining the probability vectors.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: October 29, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Yann Barbotin, Petru Cristian Budianu
  • Patent number: 8547135
    Abstract: A self-modulated voltage reference circuit may generate a reference voltage by receiving an internal reference voltage of a programmable device at a first input of a comparator block of the programmable device, receiving a feedback voltage at a second input of the comparator block, generating a pulse density modulated (PDM) signal based on a difference between the reference voltage and the feedback voltage, outputting the PDM signal at a digital output pin of the programmable device, and filtering the PDM signal to generate the output reference voltage.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: October 1, 2013
    Assignee: Cypress Semiconductor Corporation
    Inventors: Archana Yarlagadda, Dave Van Ess, Jeffrey Dahlin
  • Patent number: 8467485
    Abstract: A mobile terminal with smart antennas, comprises a plurality of groups of radio frequency signal processing modules (300), for transforming received multi-channel radio frequency signals to multi-channel baseband signals; a smart antenna processing module (306), for smart antenna baseband processing said multi-channel baseband signals output from said plurality of groups of radio frequency signal processing module so as to combine said multi-channel baseband signals into single-channel baseband signals, according to control information received one-off as said smart antenna processing module is enabled; and a baseband processing module (303-305), for providing said control information to said smart antenna processing module according to data from said smart antenna processing module, and baseband processing said single-channel baseband signals outputted from said smart antenna processing module.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: June 18, 2013
    Assignee: ST-Ericsson SA
    Inventors: Yanzhong Dai, Luzhou Xu
  • Patent number: 8451916
    Abstract: A relay-based communication system and method processing a signal without a cyclic prefix is provided. An apparatus for generating a relay signal includes a signal receiving unit which receives a source signal transmitted from a source node to a relay node and detects a received signal, a signal conversion unit which extracts samples corresponding to a first time duration from the received signal, sums the received signal and the extracted samples in a second time duration, and generates a converted received signal, a relay signal generation unit which generates a relay signal cooperating with the source signal based on the converted received signal according to a space frequency block code (SFBC) scheme, and a signal transmission unit which transmits the generated relay signal to a destination node.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: May 28, 2013
    Assignees: Samsung Electronics Co., Ltd., Postech Academy-Industry Foundation
    Inventors: Ui Kun Kwon, Young-Doo Kim, Gi Hong Im, Dae-Young Seol, Won-Jae Shin
  • Patent number: 8369551
    Abstract: A hearing aid with wireless signal transmission is provided which includes a radio reception unit for wireless reception of modulated and/or coded audio signals, a device to estimate the reception quality of the received audio signal, a device to generate an acoustic limit signal whose level increases when the estimated reception quality of the received audio signal decreases, a device to heterodyne a demodulated and/or decoded audio signal with the limit signal, and a device to output the audio signal heterodyned with the limit signal to a hearing aid wearer. To generate a limit signal, the hearing aid includes a device to generate an impulse response and a device to perform the operation of convolving the demodulated and/or decoded audio signal with the impulse response. This convolution produces a desired signal which appears closer to the hearing aid wearer when the estimated reception quality is better.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: February 5, 2013
    Assignee: Siemens Medical Instruments Pte. Ltd.
    Inventor: Ulrich Kornagel
  • Patent number: 8358509
    Abstract: An information handling system device includes a plurality of electronic components; an electric circuit including at least one trace for connecting two or more of the plurality of electronic components and transmitting data between the plurality of electronic components via at least one electric signal; and a substrate including an insulating material for serving as a base for the electric circuit and the plurality of electronic components, wherein the at least one electric signal transmitted between the plurality of electronic components is transmitted utilizing slope manipulation to provide a slope directly proportional to a data value.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: January 22, 2013
    Assignee: International Business Machines Corporation
    Inventors: Kevin J. Bills, Mahesh Bohra, Jinwoo Choi, Lloyd A. Walls
  • Patent number: 8350497
    Abstract: An controlled LED lighting system that operates using a single conductor to power and control LED nodes is disclosed. The controlled LED lighting system modulates control data onto a nominally constant DC signal transmitted down a single conductor serial line. Nodes coupled the serial line draw power into a local capacitor and demodulate the data signal. Each node shunts the serial line when additional power is not required such that the data signal is received by every node on the serial line.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: January 8, 2013
    Assignee: Neofocal Systems, Inc.
    Inventors: Mark Peting, Dale Beyer, Tsutomu Shimomura
  • Patent number: 8311131
    Abstract: The present invention relates to a method for interpolating, for the purpose of measurement of lengths and/or angles, at least two position-dependent, periodic analog signals that are phase-shifted with respect to each other and that are generated by scanning a measuring scale. According to the inventive method, the analog signals are converted to a digital data stream using a sigma-delta modulator, the data streams are combined with correctional factors and then with each other to generate a string of results, and said string of results is used to generate new correctional values by the use of a quality criterion to be satisfied for interpolation and also to generate the output signals of interpolation. The values (d) of the string of results are accumulated over a specified time interval in order to generate the correctional values (k1, k2) and the output signals (w).
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: November 13, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventor: Roman Woyzichovski
  • Patent number: 8145181
    Abstract: An electric power transmission system for communications includes on/off switches; high-voltage power assemblies; groups of high-voltage devices each being powered by the high-voltage power assembly; a carrier waves communications network comprising a transformer and filter, a filter, and a carrier waves coupling device interconnecting the transformer and filter and the filter, wherein the transformer and filter includes a low-voltage power assembly for communications and the filter includes a high-voltage power assembly for communications; and low and high-voltage devices. Data can be communicated between the low-voltage devices, between the high-voltage devices, or between the low-voltage device and the high-voltage device by transmitting carrier waves over the AC power.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: March 27, 2012
    Inventor: Ming-Wei Lu
  • Patent number: 8144799
    Abstract: Soft decision sections (503, 506) provisionally decide each modulated signal (502, 505) separated using an inverse matrix calculation of a channel fluctuation matrix at separation section (501). Signal point reduction sections (508, 510, 514, 516) reduce candidate signal points of a multiplexed modulated signal using the provisional decision results (504, 507). Soft decision sections (512, 518) make a correct decision using the reduced candidate signal points and obtain received data (RA, RB) of each modulated signal. This allows received data RA, RB with a good error rate characteristic to be obtained with a relatively small number of calculations without reducing data transmission efficiency.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: March 27, 2012
    Assignee: Panasonic Corporation
    Inventors: Yutaka Murakami, Kiyotaka Kobayashi, Masayuki Orihashi, Akihiko Matsuoka, Daichi Imamura, Rahul Malik
  • Patent number: RE43489
    Abstract: Systems and methods for converting a digital input data stream from a first sample rate to a second, fixed sample rate using a combination of hardware and software components. In one embodiment, a system includes a rate estimator configured to estimate the sample rate of an input data stream, a phase selection unit configured to select a phase for interpolation of a set of polyphase filter coefficients based on the estimated sample rate, a coefficient interpolator configured to interpolate the filter coefficients based on the selected phase, and a convolution unit configured to convolve the interpolated filter coefficients with samples of the input data stream to produce samples of a re-sampled output data stream. One or more hardware or software components are shared between multiple channels that can process data streams having independently variable sample rates.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: June 26, 2012
    Assignee: D2Audio Corporation
    Inventors: Jack B. Andersen, Larry E. Hand, Daniel L. W. Chieng, Joel W. Page, Wilson E. Taylor, Tonya Andersen