Patents by Inventor David Steven Ripley

David Steven Ripley has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200162039
    Abstract: A power amplification system with shared common base biasing is disclosed. A method for power amplification at a controller of a power amplification system comprising a plurality of cascode amplifier sections can include receiving a band select signal indicative of one or more frequency bands of a radio-frequency input signal to be amplified and transmitted. The method may further include biasing a common base stage of each of the plurality of cascode amplifier sections, and biasing a common emitter stage of a subset of the plurality of cascode amplifier sections.
    Type: Application
    Filed: June 29, 2019
    Publication date: May 21, 2020
    Inventors: Philip John LEHTOLA, David Steven RIPLEY
  • Publication number: 20200159275
    Abstract: Voltage supply system with boost converter and charge pump. A voltage supply system can include a boost converter controllable to receive an input voltage at an input node and generate an output voltage when the output voltage is greater than or equal to the input voltage. The voltage supply system can include a charge pump controllable to receive the input voltage at the input node and generate the output voltage when the output voltage is less than the input voltage. The voltage supply system can further include a controller configured to receive a control signal and control the boost converter or the charge pump to generate the output voltage at an output node based on the control signal.
    Type: Application
    Filed: July 29, 2019
    Publication date: May 21, 2020
    Inventor: David Steven RIPLEY
  • Publication number: 20200162032
    Abstract: The present disclosure relates to devices and methods for detecting and preventing occurrence of a saturation state in a power amplifier. A power amplifier module can include a power amplifier including a cascode transistor pair. The cascode transistor pair can include a first transistor and a second transistor. The power amplifier module can include a current comparator configured to compare a first base current of the first transistor and a second base current of the second transistor to obtain a comparison value. The power amplifier module can include a saturation controller configured to supply a reference signal to an impedance matching network based on the comparison value. The impedance matching network can be configured to modify a load impedance of a load line in electrical communication with the power amplifier based at least in part on the reference signal.
    Type: Application
    Filed: May 31, 2019
    Publication date: May 21, 2020
    Inventors: David Steven RIPLEY, Philip John LEHTOLA
  • Patent number: 10615835
    Abstract: Power amplification system with variable supply voltage. A power amplification system can include a power amplifier and a boost converter configured to provide a supply voltage to the power amplifier. The power amplification system can include a control system configured to provide a boost converter control signal to the boost converter to adjust the supply voltage based on a parameter associated with the power amplifier.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: April 7, 2020
    Assignee: Skyworks Solutions, Inc.
    Inventors: David Richard Pehlke, David Steven Ripley, Philip John Lehtola
  • Publication number: 20200106399
    Abstract: In some embodiments, a power amplification system can comprise a current source configured to provide a bias current, a current mirror configured to mirror the bias current, a comparator configured to compare the mirrored bias current to a threshold current, and a transistor at an output of the comparator. The transistor can be configured to be activated in response to the mirrored bias current exceeding the threshold current.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 2, 2020
    Inventors: David Steven Ripley, Joshua James Caron, Vinay Kundur, Wei Zhang
  • Publication number: 20200091820
    Abstract: A voltage supply system is disclosed, comprising a boost converter configured to receive an input voltage and generate a first output voltage at a first output node, a low-voltage supply circuit configured to receive the input voltage and generate a second output voltage at a second output node, and a routing circuit configured to route the first output voltage of the boost converter to the second output node during a selected condition of the input voltage.
    Type: Application
    Filed: September 2, 2019
    Publication date: March 19, 2020
    Inventor: David Steven RIPLEY
  • Publication number: 20200091870
    Abstract: According to some implementations, a power amplifier (PA) includes a common emitter configured to receive a radio-frequency (RF) signal. The PA also includes a carrier amplifier coupled to the common emitter to form a carrier cascode configuration, a collector of the carrier amplifier provided with a first supply voltage. The PA further includes a peaking amplifier coupled to the common emitter to form a peaking cascode configuration, a collector of the peaking amplifier provided with a second supply voltage greater than the first supply voltage.
    Type: Application
    Filed: March 26, 2019
    Publication date: March 19, 2020
    Inventors: Philip John LEHTOLA, David Steven RIPLEY
  • Patent number: 10554294
    Abstract: The systems and processes described herein can reduce the footprint of the internal devices of a wireless device by combining the DC-DC supply regulator with a FEM. Further, the device footprint can be further reduced by sharing the integrated DC-DC supply regulator among multiple FEMs reducing or eliminating the use of a separate DC-DC supply regulator for each FEM of a wireless device. Moreover, in certain embodiments, by integrating the DC-DC supply regulator into a 2G FEM, power efficiency can be improved for some wireless devices. For example, the DC-DC supply regulator may be used to supply power to a PA used for high-band 2G transmission functions. Using the DC-DC supply regulator can improve power efficiency compared to systems that supply the power for the high-band 2G PA directly from the power supply (e.g., the battery).
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: February 4, 2020
    Assignee: Skyworks Solutions, Inc.
    Inventor: David Steven Ripley
  • Patent number: 10547305
    Abstract: A switch control circuit includes a positive voltage bias node, a voltage-regulated positive supply rail coupled to the positive voltage bias node, a charge pump coupled to a charge pump supply node, and a current source positive supply rail coupled to the charge pump supply node and configured to supply the charge pump.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: January 28, 2020
    Assignee: Skyworks Solutions, Inc.
    Inventors: Leo John Wilz, Jonathan Christian Crandall, David Steven Ripley, James Phillip Young
  • Publication number: 20200007177
    Abstract: Aspects of this disclosure relate tuning an impedance presented to a common port of a multi-throw switch and a tunable notch filter coupled to the common port. The impedance presented to the common port can be tuned based on an impedance associated with a throw of the multi-throw switch that is activated. According to embodiments of this disclosure, a shunt inductor in parallel with a tunable capacitance circuit can tune the impedance presented to the common port of the multi-throw switch. In certain embodiments, the tunable notch filter includes a series LC circuit in parallel with a tunable impedance circuit.
    Type: Application
    Filed: June 14, 2019
    Publication date: January 2, 2020
    Inventors: David Steven Ripley, Edward F. Lawrence, Joshua Kawika Ellis
  • Publication number: 20190379332
    Abstract: Embodiments disclosed herein relate to a bias circuit that uses Schottky diodes. Typically, a bias circuit will include a number of transistors used to generate a bias voltage or a bias current for a power amplifier. Many wireless devices include power amplifiers to facilitate processing signals for transmission and/or received signals. By substituting the bias circuit design with a design that utilizes Schottky diodes, the required battery voltage of the bias circuit may be reduced enabling the use of lower voltage power supplies.
    Type: Application
    Filed: May 17, 2019
    Publication date: December 12, 2019
    Inventor: David Steven Ripley
  • Patent number: 10483926
    Abstract: Power amplifier module with power supply control. A power amplification control system can include an interface configured to receive a transceiver control signal from a transceiver. The power amplification control system can include a power amplifier control component configured to generate a power amplifier control signal based on the transceiver control signal from the transceiver and a power supply control component configured to generate a power supply control signal based on the transceiver control signal from the transceiver and to generate the power supply control signal based on a local control signal from the power amplifier control component.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: November 19, 2019
    Assignee: Skyworks Solutions, Inc.
    Inventor: David Steven Ripley
  • Publication number: 20190319720
    Abstract: Apparatus and methods of calibrating a power amplifier system to compensate for envelope amplitude misalignment are provided. In certain configurations, a method of calibrating a power amplifier system includes generating a supply voltage of a power amplifier using an envelope tracker based on shaping a scaled envelope signal using shaping data generated at a target gain compression, controlling a variable gain of a variable gain amplifier based on a gain control level signal, changing the variable gain by adjusting the gain control level signal using a calibration module, monitoring an output of the power amplifier to determine an amount of variable gain at which a detected gain compression of the power amplifier corresponds to the target gain compression of the shaping data, and calibrating the power amplifier system to compensate for envelope amplitude misalignment based on the determined amount of variable gain.
    Type: Application
    Filed: June 26, 2019
    Publication date: October 17, 2019
    Inventors: David Steven Ripley, Sabah Khesbak, Benjamin Bartram, Kevin Lee Cobley, Robert Astle Henshaw, Julian Hildersley, Robert John Thompson
  • Publication number: 20190288671
    Abstract: Systems and methods for a tunable impedance are provided. A tunable impedance includes a transistor assembly having two terminals and a control input. The transistor assembly includes one or more transistors electrically connected between the two terminals to provide a first impedance between the two terminals, based upon a control signal. One or more replica transistors react to the control signal in a similar fashion as the transistor assembly, to provide a replica impedance based upon the control signal. A control circuit is configured to generate the control signal based upon a voltage across the replica transistor(s) and/or a current through the replica transistor(s).
    Type: Application
    Filed: March 11, 2019
    Publication date: September 19, 2019
    Inventor: David Steven Ripley
  • Patent number: 10418900
    Abstract: A voltage supply system is disclosed, comprising a boost converter configured to receive an input voltage and generate a first output voltage at a first output node, a low-voltage supply circuit configured to receive the input voltage and generate a second output voltage at a second output node, and a routing circuit configured to route the first output voltage of the boost converter to the second output node during a selected condition of the input voltage.
    Type: Grant
    Filed: February 14, 2016
    Date of Patent: September 17, 2019
    Assignee: Skyworks Solutions, Inc.
    Inventor: David Steven Ripley
  • Patent number: 10382147
    Abstract: Methods of calibrating a power amplifier system to compensate for envelope amplitude misalignment are provided. In certain configurations, a method of calibrating a power amplifier system includes amplifying a radio frequency signal from a transceiver using a power amplifier and generating a supply voltage of the power amplifier using an envelope tracker, including generating a scaled envelope signal based on a power control level signal and an envelope signal, and shaping the scaled envelope signal using a shaping table generated at a target gain compression. The method further includes changing a scaling of the scaled envelope signal using a calibration module, monitoring an output of the power amplifier to determine an amount of scaling of the scaled envelope signal at which a detected gain compression of the power amplifier corresponds to the target gain compression of the shaping table, and calibrating the power amplifier system based on the determination.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: August 13, 2019
    Assignees: Skyworks Solutions, Inc., SnapTrack, Inc.
    Inventors: David Steven Ripley, Sabah Khesbak, Benjamin Bartram, Kevin Lee Cobley, Robert Astle Henshaw, Julian Hildersley, Robert John Thompson
  • Publication number: 20190245439
    Abstract: Switched-mode power supply devices and methods. A power converter can include an inductor coupled between an input node and an intermediate node, a semiconductor device coupled between the intermediate node and an output node, and a plurality of drive transistors. Each one of the plurality of drive transistors can have a drain coupled to the intermediate node and a source coupled to a ground potential.
    Type: Application
    Filed: August 13, 2018
    Publication date: August 8, 2019
    Inventors: David Richard PEHLKE, David Steven RIPLEY
  • Patent number: 10365680
    Abstract: Voltage supply system with boost converter and charge pump. A voltage supply system can include a boost converter controllable to receive an input voltage at an input node and generate an output voltage when the output voltage is greater than or equal to the input voltage. The voltage supply system can include a charge pump controllable to receive the input voltage at the input node and generate the output voltage when the output voltage is less than the input voltage. The voltage supply system can further include a controller configured to receive a control signal and control the boost converter or the charge pump to generate the output voltage at an output node based on the control signal.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: July 30, 2019
    Assignee: Skyworks Solutions, Inc.
    Inventor: David Steven Ripley
  • Publication number: 20190215774
    Abstract: A wireless device is disclosed that can support carrier aggregation uplink (“CAUL”) communication using a single wideband coupler. A single wideband coupler that can operate or support some or all of the communication bands of the wireless device can be used in conjunction with one or more diplexers and/or filters to measure the power of individual communication bands involved in the transmission process. Further, the use of a wideband coupler and switching network to measure the transmit power from the one or more transmit paths or main paths of a wireless device can reduce the size of a transceiver and reduce the insertion loss attributed to the power measurement components compared to systems that use separate measurement systems for each transmit path. The power measurement system may occur in a separate path in electrical connection with the wideband coupler, which may therefore be termed a coupler path.
    Type: Application
    Filed: December 6, 2018
    Publication date: July 11, 2019
    Inventor: David Steven Ripley
  • Publication number: 20190214902
    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. Further, the voltage converter may implement frequency modulation and a pulse skipping mode to improve the efficiency of switching operational states of the voltage converter.
    Type: Application
    Filed: January 8, 2019
    Publication date: July 11, 2019
    Inventors: Harry Hui Liu, Timothy James Mansheim, David Steven Ripley