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Microphone output limiter

  • US 6,266,423 B1
  • Filed: 04/15/1998
  • Issued: 07/24/2001
  • Est. Priority Date: 04/15/1998
  • Status: Expired due to Term
First Claim
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1. A microphone output limiter, comprising:

  • a. a microphone having a pair of output terminals;

    b. a pre-amplifier having a pair of input terminals operably connected to said pair of microphone output terminals;

    c. a threshold level detector having a pair of input lines, each separately connected to said pre-amplifier input terminals, said threshold level detector having an output line;

    d. a variable impedance device having an input circuit connected to said threshold level detector output line and a pair of output lines operably connected to said pre-amplifier input terminals; and

    e. said variable impedance device producing a shunt load impedance at said pair of input terminals of said pre-amplifier in response to a control signal from said threshold level detector, which control signal is generated whenever said microphone generates a signal that exceeds a preselected level set within said threshold level detector.

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