Including Particular Power Supply Circuitry Patents (Class 330/297)
  • Patent number: 10254811
    Abstract: Systems, apparatuses, and methods for monitoring power rails during power sequences are disclosed. An apparatus includes one or more voltage regulators, a plurality of registers, and control logic. The control logic is configured to monitor a power rail generated by a voltage regulator. The control logic generates and stores an indication of pass or failure in a first register for the power rail during a power sequence. The control logic enables the first register to be read by an external device subsequent to completion of the power sequence. In another embodiment, the control logic generates a pass indicator if the power rail is less than a first voltage value on a first boundary of a timing interval and if the power rail is greater than a second voltage value on a second boundary of the timing interval. Otherwise, a fail indicator is generated.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: April 9, 2019
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Donald L. Cheung, Anup Chakravarthi Suggula
  • Patent number: 10230343
    Abstract: A Class G amplifier system including a processing unit configured to receive an input signal and output a delayed processed input signal, a class G amplifier configured to receive the delayed processed input signal, and a power supply. The power supply includes a regulator configured to operate in a plurality of configurations, each configuration outputs a different supply voltage to the class G amplifier and a control circuit configured to receive the input signal and determine the supply voltage required from the regulator when the delayed processed input signal is received at the class G amplifier, and output a signal to the regulator to indicate the required configuration for the required supply voltage.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: March 12, 2019
    Assignee: AVNERA CORPORATION
    Inventors: Garry N. Link, Eric King, Xudong Zhao, Wai Lee, Alexander C. Stange, Amit Kumar
  • Patent number: 10171053
    Abstract: Apparatus and methods for power amplifiers with an injection-locked oscillator driver stage are provided herein. In certain configurations, a multi-mode power amplifier includes a driver stage implemented using an injection-locked oscillator and an output stage having an adjustable supply voltage that changes based on a mode of the multi-mode power amplifier. By implementing the multi-mode power amplifier in this manner, the multi-mode power amplifier exhibits excellent efficiency, including when the voltage level of the adjustable supply voltage is relatively low.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: January 1, 2019
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventor: Yasser Khairat Soliman
  • Patent number: 10135396
    Abstract: Methods and systems for modulating an amplifier power supply to efficiently attain amplified RF output power with much lower power dissipation than existing amplifiers. In a cable television (CATV) network, a processor receives a signal to be amplified by an amplifier at a location remote from the processor. A bias point of the amplifier may be variably modulated based on peaks of an input signal to reduce amplifier dissipation.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: November 20, 2018
    Assignee: ARRIS Enterprises LLC
    Inventors: Marcel F. Schemmann, Zoran Maricevic
  • Patent number: 10079575
    Abstract: A PA power supply, which includes a first ET power supply, power supply control circuitry, a first PMOS switching element, and a second PMOS switching element, is disclosed. During a first operating mode, the power supply control circuitry selects an OFF state of the first PMOS switching element, selects an ON state of the second PMOS switching element, and adjusts a voltage of a first switch control signal to maintain the OFF state of the first PMOS switching element using a voltage at a source of the first PMOS switching element and a voltage at a drain of the first PMOS switching element; the PA power supply provides a first PA power supply signal; and the first ET power supply provides a first ET power supply signal, such that the first PA power supply signal is based on the first ET power supply signal.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: September 18, 2018
    Assignee: Qorvo US, Inc.
    Inventors: Manbir Singh Nag, Michael R. Kay, Philippe Gorisse, Nadim Khlat
  • Patent number: 10038406
    Abstract: A voltage converter can be switched among two or more modes to produce an output voltage tracking a reference voltage that can be of an intermediate level between discrete levels corresponding to the modes. One or more voltages generated from a power supply voltage, such as a battery voltage, can be compared with the reference voltage to determine whether to adjust the mode. The reference voltage can be independent of the power supply voltage.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: July 31, 2018
    Assignee: Skyworks Solutions, Inc.
    Inventors: Hui Liu, David Steven Ripley
  • Patent number: 10008994
    Abstract: An audio amplifier system is described comprising: a variable gain audio processor for processing digital audio signal, a digital to analog converter coupled to the audio processor, and configured to receive the processed digital audio signal, a variable gain amplifier having an input coupled to the output of the digital to analog converter and operably connected to a power supply, a controller coupled to the variable gain audio processor and the variable gain amplifier and configured to switch the audio amplifier system between a first operating mode having a first power supply voltage value and a second operating mode having a second higher power supply voltage value; wherein the controller is operable in the first operating mode to set the audio amplifier system gain to a desired gain value and in the second operating mode to maintain the desired gain value.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: June 26, 2018
    Assignee: NXP B.V.
    Inventors: Marco Berkhout, Lûtsen Ludgerus Albertus Hendrikus Dooper, Maarten van Dommelen, Han Martijn Schuurmans
  • Patent number: 10008992
    Abstract: An amplifier may include a final output stage switchable among a plurality of modes comprising a mode which is enabled by coupling an output driver to an output of the final output stage and a preconditioning circuit coupled to the output of the final output stage. The preconditioning circuit may be configured to precondition at least one of a voltage and a current of the output of the final output stage prior to coupling the output driver to the output of the final output stage to limit audio artifacts caused by switching the final output stage to the mode or may be configured to perform a switching sequence to switch between a first mode and a second mode of the plurality of modes, such that at all points of the switching sequence, output terminals of the output of the final output stage have a known impedance.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: June 26, 2018
    Assignee: Cirrus Logic, Inc.
    Inventors: Lei Zhu, Xin Zhao, Alan Mark Morton, Tejasvi Das, Ku He, Xiaofan Fei
  • Patent number: 10003875
    Abstract: A phantom power supply device supplies a power supply current to a condenser microphone from a positive terminal of the first DC power supply through a hot and cold supply resistors in the hot and the cold signal line, and includes a remote control switch. A negative terminal, being connected in series to a negative terminal of the first DC power supply in a voltage-adding manner, of the second DC power supply is connected to the switch, and an added voltage of the first and second DC supply is fed to the current drive element on the condenser microphone by an ON operation of the remote control switch. This configuration enables the LEDs connected in series mounted on the condenser microphone to be lit up with enough light emitting luminance even when a low voltage, such as 12 V, is selected as a phantom power supply voltage.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: June 19, 2018
    Assignee: AUDIO-TECHNICA CORPORATION
    Inventor: Satoshi Yoshino
  • Patent number: 9998075
    Abstract: Systems, methods and apparatuses for efficient control of a pass device driven into its triode region of operation are described. Output drive capability of an operational amplifier driving the pass device is boosted during a transition of the pass device from operating in a triode region to operating in a saturation region. An exemplary implementation of an LDO controlling pass devices for providing burst RF power to a power amplifier is described. An alternative configuration that boosts the driving capability of the operational amplifier using an asymmetrical mirroring circuit is also described.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: June 12, 2018
    Assignee: pSemi Corporation
    Inventor: Jaroslaw Adamski
  • Patent number: 9973147
    Abstract: An envelope tracking power management circuit is disclosed. An envelope tracking power management circuit includes a first envelope tracking amplifier(s) and a second envelope tracking amplifier(s), each configured to amplify a respective radio frequency (RF) signal(s) based on a respective supply voltage. A power management circuit can determine that a selected envelope tracking amplifier, which can be either the first envelope tracking amplifier(s) or the second envelope tracking amplifier(s), receives the respective supply voltage lower than a voltage required to amplify the respective RF signal(s) to a predetermined voltage. In response, the power management circuit provides a boosted voltage, which is no less than the required voltage, to the selected envelope tracking amplifier.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: May 15, 2018
    Assignee: Qorvo US, Inc.
    Inventor: Nadim Khlat
  • Patent number: 9948242
    Abstract: A selectable current limiter circuit to limit the current an amplifier with a load. The limiter circuit limits the current of an amplifier by comparing a voltage reference that follows the output swing of the amplifier to voltage drop across a current limiting resistor coupled to the output of the amplifier. The limiter circuits are operatively coupled to buffer and switch circuits that delay the current limiting until the limiter circuits are activated.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: April 17, 2018
    Assignee: APEX MICROTECHNOLOGY, INC.
    Inventors: Alan Lee Varner, Gregory Michael Patchin, Kirby Neil Gaulin
  • Patent number: 9941844
    Abstract: Envelope tracking power converter circuitry is configured to receive a supply voltage and simultaneously provide a first envelope tracking power supply signal for amplifying a first RF input signal and a second envelope tracking signal for amplifying a second RF input signal.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: April 10, 2018
    Assignee: Qorvo US, Inc.
    Inventor: Nadim Khlat
  • Patent number: 9941936
    Abstract: A communication device includes a pulse width modulator that is provided with an oscillator signal at a communication carrier frequency. The pulse width modulator input is an amplified reference voltage that is regulated by a feedback loop. A modulation control provides the data signal to be transmitted. The modulation control may either be provided to the amplifier mixed with the reference voltage or may be provided to the pulse width modulator. A power transistor receives the pulse width modulator output and generates a chip output signal. An external filter is connected at the chip output to filter the signal that is provided to the communication antenna and produce a carrier sinusoid with an amplitude proportional to the pulse width modulated by voltage regulation and by the modulating data input. The power source is connected to the external filter.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: April 10, 2018
    Assignee: Intel IP Corporation
    Inventors: Sathish K. Kuttan, Jean-Yves Michel
  • Patent number: 9912306
    Abstract: Provided is a power supply circuit for a wireless mobile device having a plurality of power amplification components. The power supply circuit includes: a first DC-DC converter, for providing at least one constant output voltage (which is provided to the power amplification components) and/or at least one DC intermediate voltage; a second DC-DC converter, for providing a DC component of at least one time-varying output voltage; and at least one linear amplifier. When the at least one linear amplifier receives the at least one DC intermediate voltage from the first DC-DC converter, the at least one linear amplifier provides at least one AC component of the at least one time-varying output voltage. The DC component and the at least one AC component of the at least one time-varying output voltage are combined into the at least one time-varying output voltage and provided to the power amplification components.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: March 6, 2018
    Assignee: MEDIATEK INC.
    Inventors: Shih-Mei Lin, Chien-Wei Kuan, Chen-Yen Ho, Che-Hao Meng, Tso-Min Chen, Chia-Sheng Peng, Sheng-Hong Yan
  • Patent number: 9882536
    Abstract: Provided is a technique for effectively implementing DC removal during switching of transmission scheme or transmission data in a wireless apparatus equipped with a function for supplying a voltage to a power amplifier by ET control. When the ET control is not carried out in a power supply unit, more specifically, when an IQ signal is not present, a control unit outputs a pulse width modulation (PWM) signal for a fixed voltage via a switch unit. In other words, the switch unit selectively supplies a PWM signal for ET and a PWM signal for the fixed voltage to a switching amplifier. The switching amplifier is controlled by a predetermined control signal from the control unit.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: January 30, 2018
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventor: Junya Dosaka
  • Patent number: 9859850
    Abstract: According to some implementations, a voltage supply system includes a boost converter including a bypass core. The voltage supply system also includes a buck converter configured to receive an input voltage and generate a buck voltage. The voltage supply system further includes a routing circuit configured to provide the buck voltage as an input to the boost converter.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: January 2, 2018
    Assignee: Skyworks Solutions, Inc.
    Inventor: David Richard Pehlke
  • Patent number: 9847720
    Abstract: Provided herein are a single-inductor dual-output (SIDO) power converter operable in a discontinuous conduction mode and a control method thereof. The SIDO power converter is operable to switch between a boost mode and a buck-boost mode. The SIDO power converter dynamically adjusts output timings of clock signals with respect to the loads according to a load difference therebetween to lower the power consumption with a light load when the inductor current is zero to achieve optimal power distribution.
    Type: Grant
    Filed: November 29, 2015
    Date of Patent: December 19, 2017
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Chih-Yuan Chen, Tzu-Yang Yen
  • Patent number: 9835676
    Abstract: A method of characterizing an envelope tracking amplification stage, the method comprising: generating an input test waveform which is representative of an input waveform under normal operating conditions of the amplification stage; applying a respective one of a plurality of different shaping functions, each comprising a non-linear transfer function, to the input signal envelope in each of a plurality of test periods during the period in which the input test waveform is applied as the input signal to generate the input to the envelope tracking modulated supply voltage; measuring parameters of the amplification stage during the period in which the input test waveform is applied in order to allow determination of the gain, phase and efficiency characteristics of the amplifier; and for each of the gain, phase and efficiency characteristics, generating a three dimensional plot of the characteristic with respect to input power and supply voltage applied to the amplifier.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: December 5, 2017
    Assignee: SnapTrack, Inc.
    Inventors: Garvin Wills, Gerard Wimpenny
  • Patent number: 9837958
    Abstract: Systems and methods are provided for a crystal (xtal) oscillator with high interference immunity. Generated reference signals may be processed to mitigate effects of interference. The processing may comprise filtering, particularly at harmonic positions, to remove or greatly reduce interference signals.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: December 5, 2017
    Inventors: Xuefeng Chen, Hosein Zareie
  • Patent number: 9831906
    Abstract: An active electronically scanned array (AESA) includes a plurality of power amplifiers including first power amplifiers and second power amplifiers. The first power amplifiers are biased by a first drain voltage. The second power amplifiers are biased by a second drain voltage. The second drain voltage is different from the first drain voltage.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: November 28, 2017
    Assignee: Rockwell Collins, Inc.
    Inventors: Chenggang Xie, James B. West
  • Patent number: 9806405
    Abstract: An integrated circuit for use in remote keyless entry (RKE) applications is disclosed that integrates two drivers with a shared dual mode antenna. The drivers may be integrated on a single integrated circuit chip using high voltage (HV) complementary metal-oxide-semiconductor (CMOS) processes. In immobilizer mode of operation, an immobilizer driver coupled to the dual mode antenna is configured to drive the dual mode antenna, while an LF mode driver coupled to the dual mode antenna is configured to be idle. In LF mode of operation, the LF mode driver is configured to drive the dual mode antenna, while the immobilizer driver is configured to be idle. In some implementations, the drivers are coupled to a common node coupled to the dual mode antenna and are selectively biased with different supply voltages based on the current mode of operation to prevent current leakage and component damage.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: October 31, 2017
    Assignee: Atmel Corporation
    Inventors: Thorsten Fahlbusch, Marco Schwarzmueller, Juergen Schnabel
  • Patent number: 9769298
    Abstract: A cordless phone apparatus is provided, which includes one or more slave devices and a master device. The master device includes: i) a LAN transmitter configured to transmit slave device information to a wireless IP terminal via a wireless LAN, wherein the slave device information includes identification information of each slave device registered to the master device, ii) a receiver configured to receive from the wireless IP terminal selection of the identification information of a destination slave device and selection of transfer data including at least one of ringtone data, wallpaper data, and phone book data, iii) a transfer data converter configured to convert at least one of the ringtone data, wallpaper data, and phone book data included in the transfer data into a data format usable in the destination slave device, and iv) a cordless phone transmitter configured to transmit the converted transfer data to the destination slave device.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: September 19, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hikaru Fukuda, Eiichi Hatae, Satoshi Ando
  • Patent number: 9686024
    Abstract: A power detector is described herein that detects a true power provided by power amplifier of an RF transmitter. The power detector may include a plurality of voltage detectors that determine one or more voltages of a power amplifier included in the RF transmitter and/or a transformer included in the RF transmitter. At least one of the voltage detectors may be coupled to a sense inductor that senses one or more magnetic fields emitted by the transformer. The at least one voltage detector coupled to the sense inductor determines the voltage induced across the sense inductor as a result of the sensed magnetic field(s). The determined voltage(s) may be used to determine the load impedance of an antenna of the RF transmitter that transmits the RF signals. The load impedance may be used to accurately measure the power regardless of any impedance mismatches between the power amplifier and the antenna.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: June 20, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Heng-Yu Jian, Chun-Hao Hsu
  • Patent number: 9680427
    Abstract: A power amplifier having a stack structure comprises a first driver stage that receives a power voltage from a power supply and receives and amplifies an input signal; a second driver stage that receives the power voltage from the power supply, has an input terminal connected with an output terminal of the first driver stage, and receives and amplifies an output signal from the first driver stage; and a power stage that has a power input terminal connected with a ground terminal of the first driver stage and a ground terminal of the second driver stage and receives a virtual ground voltage, and has an input terminal connected with an output terminal of the second driver stage and receives and amplifies an output signal from the second driver stage.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: June 13, 2017
    Assignee: SOONGSIL UNIVERSITY RESEARCH CONSORTIUM TECHNO-PARK
    Inventors: Ho Yong Hwang, Chang Kun Park
  • Patent number: 9680424
    Abstract: A power amplifier without transformer includes an audio isolator, a phase detector, a power protection controller, a rectifier and an amplifier. The audio isolator is used to isolate audio-source input end and the amplifier for making the amplifier directly connected to utility power via the rectifier without transformer to increase transformation efficiency and decrease weight and bulk of the power amplifier substantially. The phase detector is used to detect utility power phase whether correct. The power protection controller is used to determine utility power whether supply to the amplifier for preventing the amplifier from broken caused by excessive current.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: June 13, 2017
    Assignee: JIN TAI DE TECHNOLOGY CO., LTD.
    Inventor: Pai-Shih Chiu
  • Patent number: 9537453
    Abstract: An amplifier cell apparatus has an RF input node, a first power transistor in communication with the input node through a first input impedance matching network, a second power transistor in communication with the input node through a second input impedance matching network, and an RF output node in communication with the first and second power transistors through a single output impedance matching network so that the first and second input impedance matching networks are disposed on an RF input side of the amplifier cell.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: January 3, 2017
    Assignee: TELEDYNE SCIENTIFIC & IMAGING, LLC.
    Inventor: Zachary M. Griffith
  • Patent number: 9484860
    Abstract: A tracking power supply for one or more amplifiers includes one or more cascaded sets of power boost circuits to temporarily boost the positive and/or negative power supply rail, respectively. Each power boost circuit may include a gain element and an energy source such as a capacitor or battery, and the power boost circuits are linked to provide a greater degree of voltage boost when needed. An optional control circuit monitors amplifier output signal levels, or separately amplified input signal levels, and provides power boost control signals to the power boost circuits, which temporarily raise or lower the positive and/or negative supply voltages above or below the nominal voltage rails in tandem with the highest and lowest output signals, respectively, from the amplifier(s).
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: November 1, 2016
    Assignee: THX Ltd.
    Inventors: Owen Jones, Lawrence R. Fincham
  • Patent number: 9444419
    Abstract: A differential audio amplifier system and a related system to generate an output signal free or with only very limited clipping are disclosed. It provides a solution to solve the problem of limited electrical speaker amplifier output power available (e.g. inside battery driver applications). A differential speaker amplifier has positive and negative supply rails. In a first embodiment of the disclosure the negative supply rail is connected to the output of an inverting buck-boost converter and the positive supply rail is directly connected to VSS voltage. In a second embodiment of the disclosure the positive supply rail is connected to the output of a buck-boost converter and the negative supply rail is directly connected to a positive battery voltage.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: September 13, 2016
    Assignee: Dialog Semiconductor GmbH
    Inventor: Holger Petersen
  • Patent number: 9438181
    Abstract: Disclosed boost amplifiers are used with a BTL amplifier that outputs balanced audio signals and that has an output current capacity and a dynamic power capacity. Disclosed amplifiers include an audio amplifier with a dynamic power capacity and that amplifies the balanced audio signals and applies them to a load, at least one diode that receives audio signals and produces single-ended input power signals, and at least one regulator that converts the single-ended input power signal into a regulated power signal of a higher magnitude. The boost regulator presenting a variable input impedance to the BTL amplifier such that the output current capacity of the BTL amplifier is not exceeded. Disclosed amplifiers also include a DC power reservoir that stores power from the regulated power signal and supplies sufficient power that the dynamic output power capacity of the audio amplifier exceeds the dynamic power capacity of the BTL amplifier.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: September 6, 2016
    Assignee: Rockford Corporation
    Inventors: David D. Baker, James C. Strickland
  • Patent number: 9425744
    Abstract: A multi-mode bias modulator operating in envelope tracking mode or average power tracking mode and an envelope tracking power amplifier using the same are disclosed. The envelope tracking power amplifier includes a multi-mode bias modulator and a power amplifier. The multi-mode bias modulator generates a variable bias voltage using a linear amplifier and a switching amplifier operating in envelope tracking mode or average power tracking mode in accordance with an operation mode control signal that determines any one of envelope tracking mode and average power tracking mode. The power amplifier is biased in response to the variable bias voltage, power-amplifies a radio frequency (RF) signal, and outputs the amplified RF signal to an antenna.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: August 23, 2016
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Youngoo Yang, Junghyun Ham, Hearyun Jung
  • Patent number: 9417741
    Abstract: A capacitance sensing apparatus includes: a driving circuit unit applying a driving signal of a first period to a node capacitor; a first integrating circuit unit integrating voltage charged in the node capacitor to generate output voltage of which a voltage level is changed twice during a second period; a buffer capacitor charged or discharged by the output voltage of the first integrating circuit unit; a second integrating circuit unit integrating voltage charged in the buffer capacitor to generate output voltage of which a voltage level is changed twice during the first period; and an amplifying unit differentially amplifying non-inverted output voltage and inverted output voltage of the second integrating circuit unit, wherein the amplifying unit amplifies voltage corresponding to a difference between the non-inverted output voltage and the inverted output voltage during a reset section of the second integrating circuit unit to generate offset information.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: August 16, 2016
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byeong Hak Jo, Tah Joon Park, Yong Il Kwon, Hyun Suk Lee
  • Patent number: 9407476
    Abstract: A power amplifying apparatus and a method for effectively controlling a bias voltage of a power amplifier are provided. An electronic device includes a baseband signal processor configured to convert a baseband signal to an envelope signal, a power amplifier configured to amplify a Radio Frequency (RF) signal based on the baseband signal, a power modulator configured to modulate an input voltage to a bias voltage of the power amplifier based on the envelope signal, and a power controller configured to control an operation of the power modulator according to a characteristic of the baseband signal.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: August 2, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chae-Man Lim, Byung-Wook Yoo
  • Patent number: 9402128
    Abstract: Adaptive rail power amplifier technology processes an audio signal by feeding the audio signal to the power amplifier to produce an output signal, applying positive and negative power supply voltages centered with respect to the audio signal to the positive and negative power supply rails of the power amplifier, comparing the output signal with the positive and negative power supply rail voltages to produce dynamically varying positive and negative control signals, feeding the positive and negative control signals to positive and negative high current charge pumps and adding supplemental positive and negative voltages from the positive and negative charge pumps to the positive and negative power supply rails to produce a linear adaptive rail voltage which tracks the output signal.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: July 26, 2016
    Inventor: James K. Waller, Jr.
  • Patent number: 9385593
    Abstract: A device may be associated with a power source. The device may include a charge pump configured to output a pulse-width modulated voltage based upon an input voltage from the power source, with the pulse-width modulated voltage varying between a first voltage and a second voltage. The device may also include a low-pass filter comprising an output capacitor, with the output capacitor being configured to average the pulsed-width modulated voltage and to output a filtered voltage having a value different than that of the input voltage. The device may further include a controller configured to selectively decouple the charge pump from the power source when a load imposed on the low-pass filter is below a threshold load.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: July 5, 2016
    Assignee: STMicroelectronics International N.V.
    Inventors: Shyam Somayajula, Sri Ram Gupta, Lionel Cimaz
  • Patent number: 9362825
    Abstract: RF PA circuitry and a DC-DC converter, which includes an RF PA envelope power supply and DC-DC control circuitry, are disclosed. The PA envelope power supply provides an envelope power supply signal to the RF PA circuitry. The DC-DC control circuitry has a DC-DC look-up table (LUT) structure, which has at least a first DC-DC LUT. The DC-DC control circuitry uses DC-DC LUT index information as an index to the DC-DC LUT structure to obtain DC-DC converter operational control parameters. The DC-DC control circuitry then configures the PA envelope power supply using the DC-DC converter operational control parameters. Using the DC-DC LUT structure provides flexibility in configuring the DC-DC converter for different applications, for multiple static operating conditions, for multiple dynamic operating conditions, or any combination thereof.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: June 7, 2016
    Assignee: RF Micro Devices, Inc.
    Inventors: William David Southcombe, Chris Levesque, Jean-Christophe Berchtold, David E. Jones, Scott Yoder, Terry J. Stockert
  • Patent number: 9337778
    Abstract: A bias circuit may include an envelope detecting unit detecting an envelope of an input signal, a source voltage generating unit generating a source voltage using a power supply voltage, and an envelope amplifying unit receiving the power supply voltage and the source voltage as a driving voltage and amplifying an envelope signal detected by the envelope detecting unit to generate a first bias voltage.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: May 10, 2016
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Chan Yong Jeong, Gyu Suck Kim, Song Cheol Hong, Tae Hwan Joo
  • Patent number: 9331662
    Abstract: An adaptive voltage divider for measuring a high voltage between a ground terminal (GND) and a measurement terminal (U). It comprises a first branch comprising a first set of impedance elements (Z, R) forming a voltage divider circuit connected between the ground terminals (GND) and the measurement terminal (U) and a voltage meter (AD2) configured to measure voltage on one of the impedance elements (Z, R) of the first branch. Furthermore, it comprises a second branch comprising a second set of impedance elements (Q, P) connected between the ground terminal (GND) and the measurement terminal (U) and switchable between a plurality of configurations, wherein in at least one configuration the second set of impedance elements (Q, P) forms a voltage divider circuit, and voltage meters (AD1, AD3) configured to measure voltage on at least one of the impedance elements (Q, P) of the second branch.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: May 3, 2016
    Assignee: AKADEMIA GORNICZO-HUTNICZA IM. STANISLAWA STASZICA W KRAKOWIE
    Inventor: Jerzy Nabielec
  • Patent number: 9304153
    Abstract: In one embodiment, a method of verifying a component coupled to an output of a power supply includes measuring a frequency response from a control input of the power supply to the output of the power supply. The method also includes comparing the frequency response to a predetermined metric based on the measuring. The component is determined to be valid if the frequency response falls within the predetermined metric.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: April 5, 2016
    Assignee: Infineon Technologies AG
    Inventor: Wolfgang Scherr
  • Patent number: 9294078
    Abstract: A system for circuit for generating an output signal with a dynamically adjustable slew rate includes a sampler, an envelope detector, an envelope comparison and control circuit, and a voltage-driver circuit that includes output buffers for generating the output signal. The sampler generates a sampled signal indicative of the slew rate of the output signal. The envelope detector generates an envelope detection signal indicative of a peak value of the sampled signal. The envelope comparison and control circuit compares a voltage level of the envelope detection signal with various threshold voltage levels, and generates control signals. The voltage-driver circuit controls the operation states of the output buffers based on the control signals to dynamically adjust the slew rate of the output signal.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: March 22, 2016
    Assignee: REESCALE SEMICONDUCTOR,INC.
    Inventors: Chetan Verma, Geetansh Arora, Amit Roy
  • Patent number: 9281783
    Abstract: A power supply system includes a high-speed power supply providing a first output, operating in conjunction with an externally supplied DC source or low frequency power supply which provides a second output. A frequency blocking power combiner circuit combines the first and second outputs to generate a third output in order to drive a load, while providing frequency-selective isolation between the first and second outputs. A feedback circuit coupled to the combined, third output compares this combined, third output with a predetermined control signal and generates a control signal for controlling the high-speed power supply, based on a difference between the third output and the predetermined control signal. The feedback circuit does not control the DC source or the low frequency power supply, but controls only the high-speed power supply.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: March 8, 2016
    Assignee: QUANTANCE, INC.
    Inventors: Serge Francois Drogi, Martin Tomasz
  • Patent number: 9257940
    Abstract: Apparatus and methods for capacitive load reduction are disclosed. In one embodiment, a power amplifier system includes a plurality of power amplifiers and an envelope tracking module for generating a supply voltage for the power amplifiers. The power amplifier system further includes a switch and a decoupling capacitor operatively associated with a first power amplifier of the system. The switch is configured to electrically float an end of the decoupling capacitor when the first power amplifier is disabled so as to reduce capacitive loading of the envelope tracker and to operate as a dampening resistor when the power amplifier is enabled so as to improve the stability of the system.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: February 9, 2016
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventor: Sabah Khesbak
  • Patent number: 9236806
    Abstract: Method and apparatus for controlling a programmable power converter are provided. The method and apparatus generate a first power source and a second power source. The voltage level of the second power source is lower than the voltage level of the first power source. The first power source and the second power source provide a power supply for a control circuit. The control circuit will use the first power source as its power supply when the first power source is low. The control circuit will use the second power source as its power supply for saving the power when the first power source is high.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: January 12, 2016
    Assignee: System General Corp.
    Inventors: Ta-Yung Yang, Chou-Sheng Wang, Pei-Sheng Tsu, Yi-Min Hsu
  • Patent number: 9237401
    Abstract: Electronic devices may provide microphone bias voltages to accessories. The accessories may include circuitry powered from the microphone bias voltages. The output impedances and the voltages of the microphone bias voltages may be adjusted during operation of the electronic devices. An electronic device may provide a bias voltage to an accessory, may lower the output impedance of the bias voltage, and may increase the voltage of the bias voltage during operation of the electronic device. Accessories that received bias voltages with lowered impedances or raised voltage levels may exhibit greater tolerance to faults such as moisture-based shorts and may be able to continue operating even in the presence of some faults.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: January 12, 2016
    Assignee: Apple Inc.
    Inventors: Yash Modi, Brian Sander, Jeffrey J. Terlizzi, Jahan Minoo, Wendell B. Sander
  • Patent number: 9220067
    Abstract: A front end radio architecture (FERA) with power management is disclosed. The FERA includes a first power amplifier (PA) block having a first-first PA for amplifying first-first signals and a first-second PA for amplifying first-second signals. Also included is a second PA block having a second-first PA for amplifying second-first signals and a second-second PA for amplifying second-second signals. At least one power supply is adapted to selectively supply power to the first-first PA and the second-second PA through a first path. The power supply is also adapted to selectively supply power to the first-second PA and the second-first PA through a second path. A control system is adapted to selectively enable and disable the first-first PA, the first-second PA, the second-first PA, and the second-second PA.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: December 22, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Nadim Khlat, Alexander Wayne Hietala
  • Patent number: 9203347
    Abstract: An apparatus comprises an amplifier having an input coupled to a radio frequency signal through a digital-to-analog circuit, an adaptive power supply having an output coupled to a bias voltage of the amplifier, wherein the output of the adaptive power supply is configured to have a shape similar to an envelope of the radio frequency signal and a feedback circuit comprising a sensing circuit and a mapping circuit, wherein the sensing circuit is configured to sense a current flowing from the adaptive power supply to the amplifier and sense the bias voltage of the amplifier, and wherein the mapping circuit is configured to sense the bias voltage of the amplifier, and wherein the mapping circuit is configured to generate a control signal for dynamically adjusting parameters of a low pass filter so as to stabilize the adaptive power supply.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: December 1, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventors: Hong Jiang, Wael Al-Qaq, Matthew Kostelnik
  • Patent number: 9197165
    Abstract: Embodiments disclosed in the detailed description relate to a pseudo-envelope follower power management system used to manage the power delivered to a linear RF power amplifier.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: November 24, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Nadim Khlat, Michael R. Kay
  • Patent number: 9190973
    Abstract: Aspects of the disclosure process an amplifier circuit. The amplifier circuit includes an input stage, an intermediate stage, an output stage and a detecting and controlling circuit. The input stage is configured to receive an electrical signal for amplification. The intermediate stage is configured to amplify with an adjustable gain. The output stage is configured to drive an audio output device in response to the amplified electrical signal. The detecting and controlling circuit is configured to detect a current for driving the audio output device, and adjust the gain of the intermediate stage based on the current to compensate for a pole change of the amplifier circuit due to a change of the current.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: November 17, 2015
    Assignee: Marvell International Ltd.
    Inventors: Hao Zhou, Tao Shui, Yonghua Song, Yongxu Wang, Haiqing Zhang
  • Patent number: 9183873
    Abstract: A damping circuit having an input terminal and an output terminal is described. The damping circuit comprises a driver having an input and an output; an RC circuit coupled between the input terminal and the output; and a resistor coupled between the output and the output terminal, wherein the RC circuit delays passing a signal from the output terminal to the input terminal and a low impedance associated with the driver generally reduces ringing.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: November 10, 2015
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Douglas Warren Dean, Craig Matthew Brannon
  • Patent number: 9172336
    Abstract: Circuits and methods for performing multilevel power amplification using multiple different supply voltages or states are disclosed. In some embodiments, power amplifiers are provided that switch between three or more supply voltages or states.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: October 27, 2015
    Assignee: Ela Devices, Inc.
    Inventors: Mark A. Briffa, Joel L. Dawson, John E. DeRoo, Krenar Komoni, David J. Perreault, Oguzhan Uyar