Patents Assigned to Digital Lab Studios, LLC
  • Patent number: 5543759
    Abstract: An audio amplification circuit includes a ganged pair of logarithmic potentiometers, each potentiometer of the pair having an input terminal, an output terminal, and a wiper terminal. The input terminals of each potentiometer are adapted for connection to an audio input signal from an audio device such as a microphone. A preamplifier stage having an input is connected to the wiper terminals of both logarithmic potentiometers. An amplification stage has a matched pair of operational amplifiers with each operational amplifier having an input connected to the output of the preamplifier stage. Each operational amplifier has a feedback loop which includes the resistance of at least one of the logarithmic potentiometers between the output terminal and the wiper terminal of said logarithmic potentiometer. The outputs of the matched pair of operational amplifiers constitute the outputs of the amplification stage. The outputs may be daisy-chained together, and a floating output stage is also provided.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: August 6, 1996
    Assignees: Digital Lab Studios, LLC, Horizon Music, Inc.
    Inventors: Richard J. Comeau, II, Richard Fay