Patents Examined by Don N. Vo
  • Patent number: 10419071
    Abstract: A ringing suppression circuit is provided at a node having a communication circuit executing communication with another node by transmitting a differential signal through a pair of communication lines. The ringing suppression circuit includes: a suppressor configured to perform a suppression operation to suppress ringing occurred with a transmission of the differential signal by connecting a resistive component between the pair of communication lines; and a reference potential provider configured to provide a reference potential, which corresponds to a midpoint potential of the pair of communication lines during a steady state, to an intermediate point of the resistive component.
    Type: Grant
    Filed: January 21, 2019
    Date of Patent: September 17, 2019
    Assignee: DENSO CORPORATION
    Inventors: Takuya Honda, Hirofumi Isomura, Tomohisa Kishigami
  • Patent number: 10411874
    Abstract: Provided is a digital transmitting module included in a host device connectable to a client device. The digital transmitting module may include: a clock generator which provides the host device with a clock whose one cycle is composed of T1, T2, T3 and T4 connected sequentially; and a voltage encoder which receives the clock from the clock generator, receives a digital bit from the host device, generates a voltage pulse by encoding the digital bit based on the clock, and then transmits the voltage pulse to the client device. Provided is a digital receiving module included in a client device connectable to a host device.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: September 10, 2019
    Assignee: GMK CO. LTD.
    Inventors: Jin Soon Hwang, Jeong Woo Lee
  • Patent number: 10411432
    Abstract: An optical module with a semiconductor element, which integrates a semiconductor laser diode with an electro-absorption modulator, mounted on a carrier; and an optical transmitter apparatus implementing the optical modules are disclosed. The carrier of the optical module has a back metal connected to the ground on the top thereof through a metal provided in a side surface of the carrier but electrically isolated from the chassis ground of the optical transmitter apparatus. The optical transmitter apparatus installs a plurality of the optical modules on a thermos-electric cooler (TEC) in a top plate thereof. The top plate is electrically isolated from the chassis ground.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: September 10, 2019
    Assignee: SUMITOMO ELECTRIC DEVICE INNOVATIONS, INC.
    Inventor: Masahiro Hirayama
  • Patent number: 10411810
    Abstract: A receiver architecture for physically-assisted computing of transforms, such as discrete Fourier transforms (DFT) and discrete Hilbert transforms (DHT), employs mutually-coherent optical frequency combs for detection of the coherent beating between an optical signal and a reference optical tone generated by a local oscillator (LO). A signal replication mixer generates a plurality of signal optical tones having a frequency pitch with an input signal mapped thereon. A reference mixer (local oscillator) generates a plurality of reference optical tones having an offset frequency pitch relative to the signal tones. A receiver backplane detects coherent beating between the signal optical tones and the reference optical tones. The input signal may be in the optical domain or in the radio-frequency domain.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: September 10, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Ping Piu Kuo, Stojan Radic
  • Patent number: 10404445
    Abstract: A receiver circuit for receiving data is described. The receiver circuit comprises a phase detector configured to receive an input data signal; a frequency path circuit configured to receive an output of the phase detector; and a false lock detection circuit configured to receive the output of the phase detector and an output of the frequency path circuit; wherein the false lock detection circuit detects a false lock of the receiver circuit to the input data signal based upon an output of the phase detector and provides a frequency offset to the frequency path circuit. A method of receiving data is also described.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: September 3, 2019
    Assignee: XILINX, INC.
    Inventors: Hongtao Zhang, Jinyung NamKoong, Winson Lin, Yohan Frans, Geoffrey Zhang
  • Patent number: 10396855
    Abstract: A mobile device includes a conductive element and a ground node. The conductive element is configured to be detected by a proximity sensor. A switch is coupled between the conductive element and ground node. The conductive element is coupled to the ground node by closing the switch. A first memory element is configured to control the switch. The first memory element includes a register bit coupled to a control terminal of the switch. A data output is configured to control the switch. A FIFO is configured to provide data to the data output. The first memory element includes a FIFO. A capacitive touch controller is configured to measure a capacitance of the conductive element. A digital processing unit is configured to convert the capacitance of the conductive element to a bit of data. A second memory element is configured to store the bit of data.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: August 27, 2019
    Assignee: Semtech Corporation
    Inventor: Chaouki Rouaissia
  • Patent number: 10389446
    Abstract: A method includes capturing images with an image sensor while switching the shutter speed of the image sensor between a first speed and a second, higher speed. When a captured subject is a barcode, a barcode image is obtained when the shutter speed is the first speed, and barcode information is obtained by decoding the barcode in the image. When a captured subject is a light source, a bright line image including bright lines corresponding to a plurality of exposure lines included in the image sensor is obtained when the shutter speed is the second speed, and a visible light signal is obtained as visible light information by decoding a pattern of the bright lines in the obtained bright line image. The method also includes displaying an image obtained through capturing performed when the shutter speed is the first speed.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: August 20, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Hideki Aoyama, Mitsuaki Oshima, Koji Nakanishi, Toshiyuki Maeda, Akihiro Ueki, Kengo Miyoshi, Tsutomu Mukai
  • Patent number: 10382157
    Abstract: An apparatus includes a finite impulse response (FIR) filter to receive a digital signal and a transmitter, operatively coupled to the FIR filter, to transmit an analog signal, converted from the digital signal, to a communication channel. The FIR filer is configured to change at least one operating parameter based on a bandwidth of the analog signal after transmission in the communication channel. The bandwidth of the analog signal is estimated, using an estimator, based at least in part on raw sampling data generated by an analog-to-digital converter (ADC) operatively coupled to the transmitter.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: August 13, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Qiang Wang, Yang Yue
  • Patent number: 10382847
    Abstract: In one embodiment, a distributed antenna system comprises: a master unit configured to receive a base station downlink radio frequency signal and to transmit a base station uplink radio frequency signal; and at least one remote antenna unit that is communicatively coupled to the master unit using at least one cable, the remote antenna unit configured to radiate a remote downlink radio frequency signal and to receive a remote uplink radio frequency signal; wherein the master unit comprises: a controller; and a respective interface to couple the controller to a first operator control panel; wherein the at least one remote antenna unit comprises: a controller; and a respective interface to couple the controller to a second operator control panel; wherein the master unit controller and the remote unit controller synchronize at least some information between the first and second operator control panels over the at least one cable.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: August 13, 2019
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Jaroslav Hoffmann, Peter Starek
  • Patent number: 10382190
    Abstract: A desirable feature of a SERDES design is power savings. One way to achieve power savings is by keeping the CDR circuit OFF during most of the time when a link is active between a transmitter and a receiver. However, due to voltage supply noise, temperature fluctuations and uncorrelated crosstalk, the receiver data may shift and/or the eye may collapse if the CDR is not turned ON to take care of these modulations. To address such disadvantages, it is proposed to generate a CDR profile that can specify optimum CDR ON and OFF time so that link stability may be maintained while saving power.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: August 13, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Rajeev Sharma, Santhosh Kumar Gude, Parth Patel, Hadi Goudarzi, Eskinder Hailu
  • Patent number: 10371505
    Abstract: Systems and methods may provide for determining an amount of physical bend in an electronic device and comparing the amount of physical bend to a threshold. Additionally, a warning may be generated if the amount of physical bend exceeds the threshold. In one example, one or more values representing the amount of physical bend are stored to a nonvolatile memory on the device and retrieved in accordance with one or more of a diagnostic push event or a diagnostic pull event.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: August 6, 2019
    Assignee: INTEL CORPORATION
    Inventors: Yuri I. Krimon, David I. Poisner, Reinhard R. Steffens
  • Patent number: 10374861
    Abstract: An apparatus for generating a radio frequency signal is provided. The apparatus includes a modulator configured to generate the radio frequency signal based on an input signal. Further, the apparatus includes a controller configured to control the modulator to generate the radio frequency signal using polar modulation, if the input signal has a first characteristic. The controller is configured to control the modulator to generate the radio frequency signal using quadrature modulation, if the input signal has a different second characteristic.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: August 6, 2019
    Assignee: Intel IP Corporation
    Inventor: Andreas Menkhoff
  • Patent number: 10374708
    Abstract: An optical communication device and related method are provided for reducing power variations among wavelength division multiplexing (WDM) signals. The device includes a dynamic gain equalizer (DGE) coupled to an optical communication path carrying WDM optical signals. The DGE is controlled in response to signals generated by an optical channel monitor (OCM). The OCM monitors signals coming into the DGE and monitors the signals leaving the DGE to thus monitor the WDM spectrum for optical signal power variations and adjust the DGE to reduce the signal power variations.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: August 6, 2019
    Assignee: Molex, LLC
    Inventors: Yi Liao, Gongjian Hu, Tian Zhu, Guijun Ji, Lifu Gong
  • Patent number: 10355894
    Abstract: Systems, methods and apparatus are described that facilitate transmission of data between two devices within an electronic apparatus. An apparatus has a bus interface, a 3-phase encoder, and a processing circuit that can configure the 3-phase encoder for a first mode of operation in which data is encoded in a sequence of two-bit symbols, transmit a first three-phase signal representative of the sequence of two-bit symbols on each of the three wires. The processing circuit may be configured to configure the 3-phase encoder for a second mode of operation in which data is encoded in a sequence of three-bit symbols. Three-phase signal representative of the sequence of two-bit symbols or sequence of three-bit symbols on each of three wires, where a three-phase signal is in a different phase on each wire when transmitted, and a transition in signaling state occurs between transmission of each pair of symbols.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: July 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventor: George Alan Wiley
  • Patent number: 10348459
    Abstract: Methods and systems for an optoelectronic built-in self-test (BIST) system for silicon photonics optical transceivers are disclosed and may include, in an optoelectronic transceiver having a transmit (Tx) path and a receive (Rx) path, where the Rx path includes a main Rx path and a BIST loopback path: generating a pseudo-random bit sequence (PRBS) signal, generating an optical signal in the Tx path by applying the PRBS signal to a modulator, communicating the optical signal to the BIST loopback path and converting to an electrical signal utilizing a photodetector, the photodetector being a replica of a photodetector in the main Rx path, and assessing the performance of the Tx and Rx paths by extracting a PRBS signal from the electrical signal. The transceiver may be a single complementary-metal oxide semiconductor (CMOS) die or in two CMOS die, where a first comprises electronic devices and a second comprises optical devices.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: July 9, 2019
    Assignee: Luxtera, Inc.
    Inventors: Steffen Gloeckner, Subal Sahni, Joseph Balardeta, Simon Pang, Stefan Barabas, Scott Denton
  • Patent number: 10330957
    Abstract: Systems and methods for smart contact lens data transfer using Light Fidelity (Li-Fi) are disclosed. In embodiments, a computer-implemented method, comprises: pairing a smart contact lens with a remote computing device, the smart contact lens including a data receiving device and a light transmitting device; receiving, by the smart contact lens, data from the remote computing device; and transmitting, by the light transmitting device of the smart contact lens, the data to a receiver device through Li-Fi communication between the light transmitting device of the smart contact lens and the receiving device.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: June 25, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Gregory J. Boss, John E. Moore, Jr., Sarbajit K. Rakshit
  • Patent number: 10333625
    Abstract: A system for controlling an optical data transmitter includes control circuitry comprising a voltage controlled current source configured to generate a reference current configured to generate at least two output currents whose magnitudes are in a fixed ratio wherein at least one of said output currents is used by said control circuitry to control current driver circuitry, a first plurality of serially coupled resistors, a first plurality of switches, a second plurality of serially coupled resistors, a second plurality of switches, and a look-up-table configured to control the first plurality of switches and the second plurality of switches based on an input to control a ratio.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: June 25, 2019
    Assignee: HILIGHT SEMICONDUCTOR LIMITED
    Inventors: Dominique Coue, William Redman-White
  • Patent number: 10326534
    Abstract: To easily capture the light emission position of a light-emitting apparatus on the imaging apparatus side, even when the positional relationship of the two changes. A mobile device detects its own speed, and an LED within the mobile device accomplishes light emission in accordance with any out of a first light emission pattern, a second light emission pattern and a third light emission pattern so that the light emission cycle becomes shorter the faster the speed of the mobile device. On the other hand, a server detects the speed of the mobile device from frames obtained through imaging by an imager, and changes the imaging interval of the imager so that the imaging interval becomes longer the slower the speed.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: June 18, 2019
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Masaaki Kikuchi
  • Patent number: 10320599
    Abstract: A method of providing a multi-carrier modulated signal (mcs), which has at least one sub-band (sb1) having a plurality of subcarriers (sc), includes the following: receiving (200) an input signal vector (s), wherein each component of the input signal vector is associated with one of the plurality of subcarriers, expanding (210) the input signal vector by adding one or more additional vector elements in front of and/or after the components of the input signal vector to obtain an expanded signal vector (sext), upsampling (220) the expanded signal vector to obtain an upsampled signal vector (sup), and filtering (230) the upsampled signal vector to obtain a filtered sub-band output signal (Xfilt).
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: June 11, 2019
    Assignee: Alcatel Lucent
    Inventors: Thorsten Wild, Frank Schaich
  • Patent number: 10320489
    Abstract: A channel estimation technique suitable for implementation at a digital communication receiver such as an optical signal receiver apparatus includes receiving, over a communication channel, a transmission comprising a sequence of modulated symbols, estimating, at multiple frequencies, estimated values of a channel transfer function of the communication channel and selectively revising the estimated values of channel transfer function by reducing glitches in the estimated values of the channel transfer function.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: June 11, 2019
    Assignee: ZTE Corporation
    Inventors: Xin Xiao, Jianjun Yu