Patents by Inventor Frederic Kubelec

Frederic Kubelec 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).

  • Amplifier with sample and hold output and low drive stage
    Patent number: 9337780
    Abstract: An amplifier (50) for voice or audio signals, and particularly for headset applications, uses a low gm amplifier (54) for initially charging an output node (OUT) at the beginning of a power-on phase. After charging the output node, a main amplifier (56) is enabled to amplify the voice or audio signal. At power-down, a sample-and-hold circuit (58) drives an output transistor to discharge an AC coupling capacitor (20). Thus, spikes at the output node are eliminated and an external filtering capacitor is not needed.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: May 10, 2016
    Assignee: Texas Instruments Incorporated
    Inventors: Paolo Cusinato, Christian Sorace, Frederic Kubelec
  • Multi-stage amplifiers to reduce pop noise
    Patent number: 8965010
    Abstract: An amplifier (50) for voice or audio signals, and particularly for headset applications, uses a low gm amplifier (54) for initially charging an output node (OUT) at the beginning of a power-on phase. After charging the output node, a main amplifier (56) is enabled to amplify the voice or audio signal. At power-down, a sample-and-hold circuit (58) drives an output transistor to discharge an AC coupling capacitor (20). Thus, spikes at the output node are eliminated and an external filtering capacitor is not needed.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: February 24, 2015
    Assignee: Texas Instruments Incorporated
    Inventors: Christian Sorace, Paolo Cusinato, Frederic Kubelec
  • Track and hold circuit to reduce pop noise
    Publication number: 20060182266
    Abstract: An amplifier (50) for voice or audio signals, and particularly for headset applications, uses a low gm amplifier (54) for initially charging an output node (OUT) at the beginning of a power-on phase. After charging the output node, a main amplifier (56) is enabled to amplify the voice or audio signal. At power-down, a sample-and-hold circuit (58) drives an output transistor to discharge an AC coupling capacitor (20). Thus, spikes at the output node are eliminated and an external filtering capacitor is not needed.
    Type: Application
    Filed: July 5, 2005
    Publication date: August 17, 2006
    Inventors: Paolo Cusinato, Christian Sorace, Frederic Kubelec
  • Multi-stage amplifiers to reduce pop noise
    Publication number: 20060182265
    Abstract: An amplifier (50) for voice or audio signals, and particularly for headset applications, uses a low gm amplifier (54) for initially charging an output node (OUT) at the beginning of a power-on phase. After charging the output node, a main amplifier (56) is enabled to amplify the voice or audio signal. At power-down, a sample-and-hold circuit (58) drives an output transistor to discharge an AC coupling capacitor (20). Thus, spikes at the output node are eliminated and an external filtering capacitor is not needed.
    Type: Application
    Filed: July 5, 2005
    Publication date: August 17, 2006
    Inventors: Christian Sorace, Paolo Cusinato, Frederic Kubelec