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: 20190165736
    Abstract: Envelope trackers providing compensation for power amplifier output load variation are provided herein. In certain configurations, a radio frequency (RF) system includes an antenna, a power amplifier that receives a radio frequency signal and outputs an amplified radio frequency signal to the antenna, a plurality of detectors coupled to the power amplifier and operable to generate a plurality of detection signals, and an envelope tracker that controls a supply voltage of the power amplifier based on an envelope of the radio frequency signal. The envelope tracker processes the plurality of detection signals to generate a load variation detection signal indicating a change in an output load of the power amplifier arising from a change in a voltage standing wave ratio (VSWR) of the antenna. Additionally, the envelope tracker adjusts a gain of the power amplifier based on the load variation detection signal.
    Type: Application
    Filed: February 1, 2019
    Publication date: May 30, 2019
    Inventors: Sabah Khesbak, Serge Francois Drogi
  • Publication number: 20190158046
    Abstract: Quadrature amplifier having envelope control. In some embodiments, an amplifier system can include a quadrature amplifier having first and second amplifiers configured to amplify first and second signals in quadrature relative to each other, with each of the first and second amplifiers including 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 quadrature amplifier 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.
    Type: Application
    Filed: November 13, 2018
    Publication date: May 23, 2019
    Inventors: Philip John LEHTOLA, Serge Francois DROGI
  • Publication number: 20190123690
    Abstract: Disclosed herein are amplification systems that are dynamically biased based on a signal indicative of differential envelope of an input radio-frequency (RF) signal being amplified. The amplification systems include a cascode amplifier configured to amplify the RF signal to generate an output RF signal when one of the transistors of the cascode amplifier is biased by a combination of the input RF signal and a biasing signal while the other transistor of the cascode amplifier is biased by a processed differential envelope signal. The cascode amplifier also receives a combination of a processed differential envelope signal and a supply voltage to generate the output RF signal. The biasing signal can improve or enhance the linearity of amplification systems.
    Type: Application
    Filed: December 15, 2018
    Publication date: April 25, 2019
    Inventors: Florinel G. BALTEANU, Paul T. DICARLO, Boshi JIN, Serge Francois DROGI
  • Patent number: 10270394
    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: Grant
    Filed: December 28, 2016
    Date of Patent: April 23, 2019
    Assignee: Skyworks Solutions, Inc.
    Inventors: Serge Francois Drogi, Florinel G. Balteanu, Luigi Panseri, Craig Joseph Christmas, Paul T. DiCarlo
  • Patent number: 10236831
    Abstract: Envelope trackers providing compensation for power amplifier output load variation are provided herein. In certain configurations, a radio frequency (RF) system includes a power amplifier that amplifies an RF signal, an output detector coupled to an output of the power amplifier and that generates an output detection signal, an input detector coupled to an input of the power amplifier and that generates an input detection signal, and an envelope tracker that generates a power amplifier supply voltage for the power amplifier based on an envelope of the RF signal. The envelope tracker compensates the power amplifier for output load variation based on the output detection signal and the input detection signal.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: March 19, 2019
    Assignee: Skyworks Solutions, Inc.
    Inventors: Sabah Khesbak, Serge Francois Drogi
  • Publication number: 20190020315
    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: September 20, 2018
    Publication date: January 17, 2019
    Inventors: Sabah Khesbak, Serge Francois Drogi, Florinel G. Balteanu
  • Patent number: 10181820
    Abstract: Disclosed herein are power amplification systems that are dynamically biased based on a signal indicative of an envelope of the signal being amplified. The power amplification systems include a power amplifier configured to amplify an input radio-frequency (RF) signal to generate an output RF signal when biased by a biasing signal. The power amplification systems also include a bias component configured to generate the biasing signal based on an envelope signal indicative of an envelope of the input RF signal. The biasing signal can improve or enhance the linearity of the power amplification systems.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: January 15, 2019
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventors: Florinel G. Balteanu, Paul T. DiCarlo, Boshi Jin, Serge Francois Drogi
  • Publication number: 20180375476
    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: June 19, 2018
    Publication date: December 27, 2018
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Sabah Khesbak, Hardik Bhupendra Modi
  • Publication number: 20180375483
    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: Application
    Filed: June 19, 2018
    Publication date: December 27, 2018
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Sabah Khesbak, Hardik Bhupendra Modi
  • Publication number: 20180331659
    Abstract: Envelope trackers providing compensation for power amplifier output load variation are provided herein. In certain configurations, a radio frequency (RF) system includes a power amplifier that amplifies an RF signal, an output detector coupled to an output of the power amplifier and that generates an output detection signal, an input detector coupled to an input of the power amplifier and that generates an input detection signal, and an envelope tracker that generates a power amplifier supply voltage for the power amplifier based on an envelope of the RF signal. The envelope tracker compensates the power amplifier for output load variation based on the output detection signal and the input detection signal.
    Type: Application
    Filed: May 2, 2018
    Publication date: November 15, 2018
    Inventors: Sabah Khesbak, Serge Francois Drogi
  • Patent number: 10110169
    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 that amplifies a radio frequency signal and that receives power from a power amplifier supply voltage. The power amplifier system further includes an envelope tracker that generates the power amplifier supply voltage based on an envelope signal corresponding to an envelope of the radio frequency signal. The envelope tracker includes a signal bandwidth detection circuit that processes the envelope signal to generate a detected bandwidth signal, and a mode control circuit that controls a mode of the error amplifier based on the detected signal bandwidth.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: October 23, 2018
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventors: Sabah Khesbak, Serge Francois Drogi, Florinel G. Balteanu
  • Publication number: 20180138862
    Abstract: Disclosed herein are circuits, devices and methods that address challenges associated with power amplifier systems. A power amplifier system includes two or more fast error amplifiers coupled to corresponding power amplifiers. The fast error amplifiers are configured to generate envelope tracking signals based on a signal envelope, the envelope tracking signals modifying a DC-DC regulated voltage from a DC-DC converter to more efficiently operate the power amplifiers. By splitting the envelope tracking between two or more fast error amplifiers and amplification between corresponding two or more power amplifiers, the power, frequency or bandwidth, linearity, signal-to-noise ratio, efficiency, or the like of the power amplifier system can be improved. Wireless communications configurations with such power amplifier systems can provide uplink carrier aggregation and/or cellular signals based on standards and protocols that require increased bandwidth and/or power.
    Type: Application
    Filed: November 13, 2017
    Publication date: May 17, 2018
    Inventors: Florinel G. Balteanu, Serge Francois Drogi, Boshi Jin, Paul T. DiCarlo
  • Publication number: 20180076772
    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 that amplifies a radio frequency signal and that receives power from a power amplifier supply voltage. The power amplifier system further includes an envelope tracker that generates the power amplifier supply voltage based on an envelope signal corresponding to an envelope of the radio frequency signal. The envelope tracker includes a signal bandwidth detection circuit that processes the envelope signal to generate a detected bandwidth signal, and a mode control circuit that controls a mode of the error amplifier based on the detected signal bandwidth.
    Type: Application
    Filed: September 7, 2017
    Publication date: March 15, 2018
    Inventors: Sabah Khesbak, Serge Francois Drogi, Florinel G. Balteanu
  • Patent number: 9857862
    Abstract: A power supply for a radio frequency (RF) power amplifier that amplifies an RF input signal into an RF output signal and a method of operation in the power supply. The power supply comprises a first power converter to convert an input voltage to the power supply into a first supply voltage of the RF power amplifier. The power supply comprises a second power converter to receive the input voltage and the first supply voltage and to selectively convert either the input voltage or the first supply voltage into at least a portion of a second supply voltage of the RF power amplifier.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: January 2, 2018
    Assignee: QUANTANCE, INC.
    Inventors: Serge Francois Drogi, Marcus Charles Mertsching, Luigi Panseri
  • Publication number: 20170338773
    Abstract: Disclosed herein are power amplification systems that are dynamically biased based on a signal indicative of an envelope of the signal being amplified. The power amplification systems include a power amplifier configured to amplify an input radio-frequency (RF) signal to generate an output RF signal when biased by a biasing signal. The power amplification systems also include a bias component configured to generate the biasing signal based on an envelope signal indicative of an envelope of the input RF signal. The biasing signal can improve or enhance the linearity of the power amplification systems.
    Type: Application
    Filed: May 16, 2017
    Publication date: November 23, 2017
    Inventors: Florinel G. BALTEANU, Paul T. DICARLO, Boshi JIN, Serge Francois DROGI
  • Patent number: 9794884
    Abstract: An envelope tracking transceiver dynamically adjusts envelope tracking parameters to achieve the desired tradeoff between noise performance and power efficiency. When higher levels of noise are acceptable, the envelope tracking transceiver dynamically adjusts transmitter parameters to achieve better power efficiency while sacrificing noise performance. When lower levels of noise are desired, the envelope tracking transceiver dynamically adjusts parameters to achieve better noise performance while sacrificing efficiency.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: October 17, 2017
    Assignee: QUANTANCE, INC.
    Inventor: Serge Francois Drogi
  • Patent number: 9762184
    Abstract: An RF PA system that generates its own local characterization information. The RF PA system includes a PA to generate a RF output signal from a RF input signal, the PA powered by a supply voltage. A characterization block generates characterization information corresponding to a relationship between the supply voltage and performance (e.g., gain, power efficiency, distortion, receive band noise) of the RF PA system for a plurality of levels of one or more operating conditions (e.g., temperature, operating frequency, modulation format, antennae mismatch, etc.) of the RF PA system. An amplitude estimator block estimates an amplitude of the RF input signal. A supply control block generates a supply voltage control signal for controlling the supply voltage based on the characterization information and the amplitude of the RF input signal.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: September 12, 2017
    Assignee: QUANTANCE, INC.
    Inventors: Serge Francois Drogi, Vikas Vinayak
  • Patent number: 9712114
    Abstract: A power amplifier system is provided. The power amplifier system includes a power supply to generate a supply voltage based on an input signal, a power amplifier powered by the supply voltage to amplify the input signal and generate an output signal, a delay determiner to determine a delay mismatch between the input signal and the supply voltage, and a programmable delay block coupled to the delay determiner to compensate for the determined delay mismatch between the input signal and the supply voltage. The delay determiner determines the delay mismatch based on a first delay between the input and output signals when the input signal is below a threshold and a second delay between the input and output signals when the input signal is above the threshold.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: July 18, 2017
    Assignee: QUANTANCE, INC.
    Inventor: Serge Francois Drogi
  • Publication number: 20170195972
    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: December 28, 2016
    Publication date: July 6, 2017
    Inventors: Serge Francois Drogi, Florinel G. Balteanu, Luigi Panseri, Craig Joseph Christmas, Paul T. DiCarlo
  • Publication number: 20170083070
    Abstract: A power supply for a radio frequency (RF) power amplifier that amplifies an RF input signal into an RF output signal and a method of operation in the power supply. The power supply comprises a first power converter to convert an input voltage to the power supply into a first supply voltage of the RF power amplifier. The power supply comprises a second power converter to receive the input voltage and the first supply voltage and to selectively convert either the input voltage or the first supply voltage into at least a portion of a second supply voltage of the RF power amplifier.
    Type: Application
    Filed: December 6, 2016
    Publication date: March 23, 2017
    Inventors: Serge Francois Drogi, Marcus Charles Mertsching, Luigi Panseri