Patents by Inventor Serge Francois Drogi

Serge Francois Drogi 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: 20220109404
    Abstract: Apparatus and methods for power amplifier bias modulation for low bandwidth envelope tracking are provided herein. In certain embodiments, a power amplifier system for a mobile device includes a power amplifier that amplifies an RF signal and a low bandwidth envelope tracker that generates a power amplifier supply voltage for the power amplifier based on an envelope of the RF signal. The envelope tracking system further includes a bias modulation circuit that modulates a bias signal of the power amplifier based on a voltage level of the power amplifier supply voltage.
    Type: Application
    Filed: December 15, 2021
    Publication date: April 7, 2022
    Inventors: Serge Francois Drogi, Philip John Lehtola, Florinel G. Balteanu
  • Publication number: 20220085766
    Abstract: Multi-level envelope trackers with an analog interface are provided herein. In certain embodiments, an envelope tracking system for generating a power amplifier supply voltage for a power amplifier is provided. The envelope tracking system includes a multi-level supply (MLS) DC-to-DC converter that outputs multiple regulated voltages, and an MLS modulator that controls selection of the regulated voltages over time based on an analog envelope signal corresponding to an envelope of the RF signal amplified by the power amplifier.
    Type: Application
    Filed: November 30, 2021
    Publication date: March 17, 2022
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Shayan Farahvash, David Richard Pehlke
  • Publication number: 20220085765
    Abstract: Multi-level envelope tracking systems with adjusted voltage steps are provided. In certain embodiments, an envelope tracking system for generating a power amplifier supply voltage for a power amplifier is provided. The envelope tracking system includes a multi-level supply (MLS) DC-to-DC converter that outputs multiple regulated voltages, an MLS modulator that controls selection of the regulated voltages over time based on an envelope signal corresponding to an envelope of a radio frequency (RF) signal amplified by the power amplifier, and a modulator output filter coupled between an output of the MLS modulator and the power amplifier supply voltage. The envelope tracking system further includes a switching point adaptation circuit configured to control the voltage level of the regulated voltages outputted by the MLS DC-to-DC converter based on a power level of the RF signal.
    Type: Application
    Filed: November 30, 2021
    Publication date: March 17, 2022
    Inventors: Serge Francois Drogi, Florinel G. Balteanu
  • Publication number: 20220085764
    Abstract: Multi-level envelope tracking systems with separate DC and AC paths are provided. In certain embodiments, an envelope tracking system for generating a power amplifier supply voltage for a power amplifier is provided. The envelope tracking system includes a multi-level supply (MLS) DC-to-DC converter that outputs multiple regulated voltages, an MLS modulator that controls selection of the regulated voltages over time based on an envelope signal corresponding to an envelope of a radio frequency (RF) signal amplified by the power amplifier, an AC path filter coupled between an output of the MLS modulator and the power amplifier supply voltage, and a DC path filter coupled between a DC voltage and the power amplifier supply voltage.
    Type: Application
    Filed: November 30, 2021
    Publication date: March 17, 2022
    Inventors: Serge Francois Drogi, Florinel G. Balteanu
  • Publication number: 20220069775
    Abstract: Power amplifier modules with controllable envelope tracking noise filters are provided herein. In certain embodiments, an envelope tracking system includes a power amplifier module and an envelope tracker that provides the power amplifier module with a power amplifier supply voltage that changes based on an envelope of a radio frequency (RF) signal amplified by the power amplifier module. The power amplifier module includes a controllable filter that filters the power amplifier supply voltage to provide flexibility in filtering envelope tracking noise.
    Type: Application
    Filed: August 16, 2021
    Publication date: March 3, 2022
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Robert John Thompson, Shayan Farahvash, David Richard Pehlke, Stephan Henzler
  • Patent number: 11239800
    Abstract: Apparatus and methods for power amplifier bias modulation for low bandwidth envelope tracking are provided herein. In certain embodiments, an envelope tracking system includes a power amplifier that amplifies an RF signal and a low bandwidth envelope tracker that generates a power amplifier supply voltage for the power amplifier based on an envelope of the RF signal. The envelope tracking system further includes a bias modulation circuit that modulates a bias signal of the power amplifier based on a voltage level of the power amplifier supply voltage.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: February 1, 2022
    Assignee: Skyworks Solutions, Inc.
    Inventors: Serge Francois Drogi, Philip John Lehtola, Florinel G. Balteanu
  • Patent number: 11223323
    Abstract: Multi-level envelope tracking systems with separate DC and AC paths are provided. In certain embodiments, an envelope tracking system for generating a power amplifier supply voltage for a power amplifier is provided. The envelope tracking system includes a multi-level supply (MLS) DC-to-DC converter that outputs multiple regulated voltages, an MLS modulator that controls selection of the regulated voltages over time based on an envelope signal corresponding to an envelope of a radio frequency (RF) signal amplified by the power amplifier, an AC path filter coupled between an output of the MLS modulator and the power amplifier supply voltage, and a DC path filter coupled between a DC voltage and the power amplifier supply voltage.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: January 11, 2022
    Assignee: Skyworks Solutions, Inc.
    Inventors: Serge Francois Drogi, Florinel G. Balteanu
  • Patent number: 11223324
    Abstract: Multi-level envelope trackers with an analog interface are provided herein. In certain embodiments, an envelope tracking system for generating a power amplifier supply voltage for a power amplifier is provided. The envelope tracking system includes a multi-level supply (MLS) DC-to-DC converter that outputs multiple regulated voltages, an MLS modulator that controls selection of the regulated voltages over time based on an analog envelope signal corresponding to an envelope of the RF signal amplified by the power amplifier, and a modulator output filter coupled between an output of the MLS modulator and the power amplifier supply voltage.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: January 11, 2022
    Assignee: Skyworks Solutions, Inc.
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Shayan Farahvash, David Richard Pehlke
  • Patent number: 11223325
    Abstract: Multi-level envelope tracking systems with adjusted voltage steps are provided. In certain embodiments, an envelope tracking system for generating a power amplifier supply voltage for a power amplifier is provided. The envelope tracking system includes a multi-level supply (MLS) DC-to-DC converter that outputs multiple regulated voltages, an MLS modulator that controls selection of the regulated voltages over time based on an envelope signal corresponding to an envelope of a radio frequency (RF) signal amplified by the power amplifier, and a modulator output filter coupled between an output of the MLS modulator and the power amplifier supply voltage. The envelope tracking system further includes a switching point adaptation circuit configured to control the voltage level of the regulated voltages outputted by the MLS DC-to-DC converter based on a power level of the RF signal.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: January 11, 2022
    Assignee: Skyworks Solutions, Inc.
    Inventors: Serge Francois Drogi, Florinel G. Balteanu
  • Publication number: 20210273614
    Abstract: Envelope tracking systems with modeling for power amplifier supply voltage filtering are provided herein. In certain embodiments, an envelope tracking system includes a supply voltage filter, a power amplifier that receives a power amplifier supply voltage through the supply voltage filter, and an envelope tracker that generates the power amplifier supply voltage. The power amplifier provides amplification to a radio frequency (RF) signal that is generated based on digital signal data, and the envelope tracker generates the power amplifier supply voltage based on an envelope signal corresponding to an envelope of the RF signal. The envelope tracking system further includes digital modeling circuitry that models the supply voltage filter and operates to digitally compensate the digital signal data for effects of the supply voltage filter, such as distortion.
    Type: Application
    Filed: May 18, 2021
    Publication date: September 2, 2021
    Inventors: Serge Francois Drogi, Florinel G. Balteanu, Shayan Farahvash
  • Publication number: 20210234512
    Abstract: Fast envelope tracking systems are provided herein. In certain embodiments, an envelope tracking system for a power amplifier includes a switching regulator and a differential error amplifier configured to operate in combination with one another to generate a power amplifier supply voltage for the power amplifier based on an envelope of a radio frequency (RF) signal amplified by the power amplifier. The envelope tracking system further includes a differential envelope amplifier configured to amplify a differential envelope signal to generate a single-ended envelope signal that changes in relation to the envelope of the RF signal. Additionally, the differential error amplifier generates an output current operable to adjust a voltage level of the power amplifier supply voltage based on comparing the single-ended envelope signal to a reference signal.
    Type: Application
    Filed: April 14, 2021
    Publication date: July 29, 2021
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Sabah Khesbak, Hardik Bhupendra Modi
  • Publication number: 20210218370
    Abstract: Envelope tracking systems for power amplifiers are provided herein. In certain embodiments, an envelope tracker is provided for a power amplifier that amplifies an RF signal. The envelope tracker includes a multi-level switching circuit having an output that provides an output current that changes in relation to an envelope signal indicating an envelope of the RF signal when the envelope tracker is operating in an envelope tracking mode. The multi-level switching circuit includes a multi-level supply (MLS) modulator that receives multiple regulated voltages of different voltage levels, and an MLS control circuit that controls the selection of the MLS modulator over time based on the envelope signal. When transitioning the MLS modulator from selection of one regulated voltage level to another regulated voltage level, the MLS control circuit provides a soft transition to gradually switch the regulated voltage levels.
    Type: Application
    Filed: December 21, 2020
    Publication date: July 15, 2021
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Sabah Khesbak, Shayan Farahvash, David Richard Pehlke
  • Publication number: 20210203280
    Abstract: Integrated Doherty power amplifiers are provided herein. In certain implementations, a Doherty power amplifier includes a carrier amplification stage that generates a carrier signal, a peaking amplification stage that generates a peaking signal, and an antenna structure that combines the carrier signal and the peaking signal. The antenna structure radiates a transmit wave in which the carrier signal and the peaking signal are combined with a phase shift.
    Type: Application
    Filed: March 11, 2021
    Publication date: July 1, 2021
    Inventors: Patrick Marcus Naraine, William J. Domino, Serge Francois Drogi, René Rodríguez
  • Patent number: 11038471
    Abstract: Envelope tracking systems with modeling for power amplifier supply voltage filtering are provided herein. In certain embodiments, an envelope tracking system includes a supply voltage filter, a power amplifier that receives a power amplifier supply voltage through the supply voltage filter, and an envelope tracker that generates the power amplifier supply voltage. The power amplifier provides amplification to a radio frequency (RF) signal that is generated based on digital signal data, and the envelope tracker generates the power amplifier supply voltage based on an envelope signal corresponding to an envelope of the RF signal. The envelope tracking system further includes digital modeling circuitry that models the supply voltage filter and operates to digitally compensate the digital signal data for effects of the supply voltage filter, such as distortion.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: June 15, 2021
    Assignee: Skyworks Solutions, Inc.
    Inventors: Serge Francois Drogi, Florinel G. Balteanu, Shayan Farahvash
  • Publication number: 20210167734
    Abstract: Apparatus and methods for envelope tracking systems with automatic mode selection are provided herein. In certain configurations, a power amplifier system includes a power amplifier configured to provide amplification to a radio frequency signal and to receive power from a power amplifier supply voltage, and an envelope tracker including a signal bandwidth detection circuit configured to generate a detected bandwidth signal based on processing an envelope signal corresponding to an envelope of the radio frequency signal. The envelope tracker further includes a switch bank configured to receive a plurality of regulated voltages, a filter configured to filter an output of the switch bank to generate the power amplifier supply voltage, and a mode control circuit configured to control a filtering characteristic of the filter based on the detected bandwidth signal.
    Type: Application
    Filed: November 9, 2020
    Publication date: June 3, 2021
    Inventors: Sabah Khesbak, Serge Francois Drogi, Florinel G. Balteanu
  • Publication number: 20210167733
    Abstract: Embodiments described herein relate to an envelope tracking system that uses a single-bit digital signal to encode an analog envelope tracking control signal, or envelope tracking signal for brevity. In certain embodiments, the envelope tracking system can estimate or measure the amplitude of the baseband signal. The envelope tracking system can further estimate the amplitude of the envelope of the RF signal. The system can convert the amplitude of the envelope signal to a single-bit digital signal, typically at a higher, oversample rate. The single-bit digital signal can be transmitted in, for example, a low-voltage differential signaling (LVDS) format, from a transceiver to an envelope tracker. An analog-to-digital converter (ADC or A/D) can convert the single-bit digital signal back to an analog envelope signal. Moreover, a driver can increase the power of the A/D output envelope signal to produce an envelope-tracking supply voltage for a power amplifier.
    Type: Application
    Filed: November 11, 2020
    Publication date: June 3, 2021
    Inventors: Serge Francois Drogi, Florinel G. Balteanu, Luigi Panseri, Craig Joseph Christmas, Paul T. DiCarlo
  • Publication number: 20210119592
    Abstract: Envelope tracking systems for power amplifiers are provided herein. In certain embodiments, an envelope tracker is provided for a power amplifier that amplifies an RF signal. The envelope tracker includes an error amplifier that controls a voltage level of a power amplifier supply voltage of the power amplifier based on amplifying a difference between a reference signal and an envelope signal indicating an envelope of the RF signal. The envelope tracker further includes a multi-level switching circuit that generates an error amplifier supply voltage based on sensing a current of the error amplifier, and uses the error amplifier supply voltage to power the error amplifier.
    Type: Application
    Filed: December 30, 2020
    Publication date: April 22, 2021
    Inventors: Serge Francois Drogi, Florinel G. Balteanu, David Richard Pehlke
  • Patent number: 10985703
    Abstract: Fast envelope tracking systems are provided herein. In certain embodiments, an envelope tracking system for a power amplifier includes a switching regulator and a differential error amplifier configured to operate in combination with one another to generate a power amplifier supply voltage for the power amplifier based on an envelope of a radio frequency (RF) signal amplified by the power amplifier. The envelope tracking system further includes a differential envelope amplifier configured to amplify a differential envelope signal to generate a single-ended envelope signal that changes in relation to the envelope of the RF signal. Additionally, the differential error amplifier generates an output current operable to adjust a voltage level of the power amplifier supply voltage based on comparing the single-ended envelope signal to a reference signal.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: April 20, 2021
    Assignee: Skyworks Solutions, Inc.
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Sabah Khesbak, Hardik Bhupendra Modi
  • Patent number: 10985711
    Abstract: High bandwidth envelope trackers are provided herein. In certain embodiments, an envelope tracking system for a power amplifier includes a switching regulator that operates in combination with a high bandwidth amplifier to generate a power amplifier supply voltage for the power amplifier based on an envelope of a radio frequency (RF) signal amplified by the power amplifier. The high bandwidth amplifier includes an output that generates an output current for adjusting the power amplifier supply voltage, a first input that receives a reference signal, and a second input that receives an envelope signal indicating the envelope of the RF signal. The second input has lower input impedance than the first input to provide a rapid transient response and high envelope tracking bandwidth.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: April 20, 2021
    Assignee: Skyworks Solutions, Inc.
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Sabah Khesbak, Hardik Bhupendra Modi
  • Publication number: 20210104989
    Abstract: In some embodiments, an amplifier system can include an amplifier circuit having first and second amplifiers configured to amplify respective first and second portions of an input signal. Each of the first and second amplifiers can include a cascode stage with input and output transistors arranged in a cascode configuration. The amplifier system can further include an envelope tracking bias circuit coupled to the amplifier circuit and configured to provide a bias signal to the output transistor of the cascode stage of at least one of the first and second amplifiers. The amplifier system can further include a supply circuit configured to provide a non-envelope tracking supply voltage to the output transistor of the cascode stage of the at least one of the first and second amplifiers.
    Type: Application
    Filed: October 13, 2020
    Publication date: April 8, 2021
    Inventors: Philip John LEHTOLA, Serge Francois DROGI