Patents by Inventor Christopher Piggin

Christopher Piggin 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).

  • AGC circuit for an echo cancelling circuit
    Patent number: 9231544
    Abstract: An amplifier circuit and a method of amplification using automatic gain control (AGC) are disclosed. A method for reducing distortions incurred by an audio signal when being rendered by an electronic device is described. The method comprises receiving an input signal; determining signal strength; determining a frequency-dependent AGC filter; wherein the frequency-dependent AGC filter is adapted to selectively attenuate the input signal within a number N of predetermined frequency ranges, according to corresponding N degrees of attenuation; wherein N predetermined frequency ranges depend upon a rendering characteristic of the electronic device; and wherein the N-degrees of attenuation depend upon the signal strength; and attenuating the input signal using the frequency-dependent AGC filter to obtain an output signal for rendering by the electronic device.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: January 5, 2016
    Assignees: Dialog Semiconductor GmbH, Dialog Semiconductor B.V.
    Inventors: Lee Bathgate, Michiel Andre Helsloot, Paul Shields, Christopher Piggin
  • AGC Circuit for an Echo Cancelling Circuit
    Publication number: 20130336494
    Abstract: An amplifier circuit and a method of amplification using automatic gain control (AGC) are disclosed. A method for reducing distortions incurred by an audio signal when being rendered by an electronic device is described. The method comprises receiving an input signal; determining signal strength; determining a frequency-dependent AGC filter; wherein the frequency-dependent AGC filter is adapted to selectively attenuate the input signal within a number N of predetermined frequency ranges, according to corresponding N degrees of attenuation; wherein N predetermined frequency ranges depend upon a rendering characteristic of the electronic device; and wherein the N-degrees of attenuation depend upon the signal strength; and attenuating the input signal using the frequency-dependent AGC filter to obtain an output signal for rendering by the electronic device.
    Type: Application
    Filed: March 5, 2013
    Publication date: December 19, 2013
    Applicants: DIALOG SEMICONDUCTOR B.V., DIALOG SEMICONDUCTOR GMBH
    Inventors: Lee Bathgate, Michiel Andre Helsloot, Paul Shields, Christopher Piggin