Patents by Inventor William Joseph Roeckner

William Joseph Roeckner 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).

  • Method and apparatus for detecting an input signal
    Patent number: 6023191
    Abstract: A level detector detects an input signal level. A rectifier (210) receives the input signal and provides a rectified signal. A prefilter (220) receives the rectified signal and attenuates high frequency components at frequencies near multiples of a decimation sample rate. The prefiltered signal is decimated (230) and low pass filtered by a lowpass filter (240) having a passband below the input frequency of the input signal. The level detector can be provided to control a variable gain stage circuit (935, 1010) which applies a gain to the input signal based on the level to form a dynamic range compressor or expander.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: February 8, 2000
    Inventors: Lawrence Edwin Connell, Mark Joseph Callicotte, William Joseph Roeckner