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Heart-beat electronic simulator

  • US 3,994,282 A
  • Filed: 04/10/1975
  • Issued: 11/30/1976
  • Est. Priority Date: 09/12/1974
  • Status: Expired due to Term
First Claim
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1. A heart-beat simulator comprising an astatic multivibrator with predetermined period and cycle ratio for providing a square wave output signal, a differentiating circuit having as its input the square wave output signal from said multivibrator for transducing said square wave input to an output signal comprising, substantially symmetrical periodic pulses decreasing from positive and negative peaks to zero, and a loudspeaker driven by the output signal from said differentiating circuit.

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