Patents Assigned to Young Chang Company Limited
  • Stable, low-noise bimodal audio filter circuit
    Patent number: 6452443
    Abstract: An audio filter circuit is formed from a pair of cross-coupled, symmetric filters, each filter having a first stage comprising a single-pole, inverting low pass filter followed by a second stage comprising a two-pole, non-inverting Sallen-Key low pass filter. The circuit is readily switched between single-ended and double-ended output, while maintaining comparable noise and gain characteristics. The gain of the circuit is readily adjustable over a range of gains.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: September 17, 2002
    Assignee: Young Chang Company Limited
    Inventors: Timothy B. Thompson, Howard A. Chamberlin, Jr.