Patents by Inventor David A. Beeson

David A. Beeson 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).

  • Apparatus and method for complete elimination of input coupling capacitors in signal amplification
    Patent number: 8138826
    Abstract: A circuit and method for signal amplification is provided. The circuit includes an amplifier including an input amplifier that is arranged to receive an input analog signal, and to provide an input amplifier output signal by amplifying the input analog signal. The amplifier further includes a DC offset correction circuit that is arranged to determine a DC offset correction for the input amplifier each time the amplifier is powered up. The DC offset correction is performed by iteratively adjusting a DC offset of the input amplifier until the input amplifier output DC offset is zero when the input analog AC signal is zero, within a predetermined tolerance. The DC offset correction circuit is further arranged to provide the determined DC offset correction to the input amplifier during operation of the amplifier.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: March 20, 2012
    Assignee: National Semiconductor Corporation
    Inventors: Ansuya P. Bhatt, Raminder Jit Singh, Adam Abed, David A. Beeson