Patents by Inventor Matt Felder

Matt Felder 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).

  • Patent number: 11837999
    Abstract: An audio amplifier employs an idle mode to reduce power consumption and improve efficiency of the amplifier. The audio amplifier comprises a modulator configured to receive an analog input signal. The modulator is operable to convert the analog input signal to differential first and second quantized signals, each having a common mode duty cycle. The modulator causes the common mode duty cycle of each of the first and second quantized signals to be shifted when the level of the analog input signal is below a threshold level so that the common mode duty cycle is one of greater than or less than fifty percent (50%). The amplifier further includes a power stage that receives the first and second quantized signals and generates corresponding first and second output signals configured to drive a load, wherein the first and second output signals switched between a supply voltage and a second voltage based on the respective first and second quantized signals.
    Type: Grant
    Filed: April 12, 2021
    Date of Patent: December 5, 2023
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Rajdeep Mukhopadhyay, Euan Murphy, Matt Felder, Simon Quinn
  • Publication number: 20210367566
    Abstract: An audio amplifier employs an idle mode to reduce power consumption and improve efficiency of the amplifier. The audio amplifier comprises a modulator configured to receive an analog input signal. The modulator is operable to convert the analog input signal to differential first and second quantized signals, each having a common mode duty cycle. The modulator causes the common mode duty cycle of each of the first and second quantized signals to be shifted when the level of the analog input signal is below a threshold level so that the common mode duty cycle is one of greater than or less than fifty percent (50%). The amplifier further includes a power stage that receives the first and second quantized signals and generates corresponding first and second output signals configured to drive a load, wherein the first and second output signals switched between a supply voltage and a second voltage based on the respective first and second quantized signals.
    Type: Application
    Filed: April 12, 2021
    Publication date: November 25, 2021
    Inventors: Rajdeep Mukhopadhyay, Euan Murphy, Matt Felder, Simon Quinn
  • Patent number: 8362936
    Abstract: A circuit for maximizing dynamic range in a digital to analog signal path comprises an input for receiving an input signal, a first gain stage coupled to the input having a first gain setting, an second gain stage coupled to the first gain stage, the second gain stage having an second gain setting, a controller configured to selectively increase the first gain setting and decrease the second gain setting according to the input signal level and an output coupled to the second gain stage for transmitting an output signal. A method for maximizing dynamic range in a digital to analog signal path comprises detecting a digital input signal level, detecting a desired user gain level, applying a first gain to the digital input signal, converting the digital input signal into an analog signal, and applying a second gain to the analog signal, wherein the first and second gain are selectively and inversely manipulated according to the digital input signal while maintaining a desired user gain level.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: January 29, 2013
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Robert Ledzius, Matt Felder
  • Publication number: 20120188111
    Abstract: A circuit for maximizing dynamic range in a digital to analog signal path comprises an input for receiving an input signal, a first gain stage coupled to the input having a first gain setting, an second gain stage coupled to the first gain stage, the second gain stage having an second gain setting, a controller configured to selectively increase the first gain setting and decrease the second gain setting according to the input signal level and an output coupled to the second gain stage for transmitting an output signal. A method for maximizing dynamic range in a digital to analog signal path comprises detecting a digital input signal level, detecting a desired user gain level, applying a first gain to the digital input signal, converting the digital input signal into an analog signal, and applying a second gain to the analog signal, wherein the first and second gain are selectively and inversely manipulated according to the digital input signal while maintaining a desired user gain level.
    Type: Application
    Filed: January 21, 2011
    Publication date: July 26, 2012
    Applicant: MAXIM INTEGRATED PRODUCTS, INC.
    Inventors: Robert Ledzius, Matt Felder