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Electrical stimulator

  • US 5,575,809 A
  • Filed: 06/11/1993
  • Issued: 11/19/1996
  • Est. Priority Date: 06/12/1992
  • Status: Expired due to Fees
First Claim
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1. An electrical stimulator, comprising:

  • a pulse wave sensor;

    a differentiating means for differentiating a pulse wave electric signal provided by said pulse wave sensor;

    a peak hold means for holding every peak value of a differential signal wave provided by said differentiating means;

    a comparing means for comparing an output differential wave of said differentiating means with a peak hold output of said peak hold means, and outputs a pulse lasting during a period commencing when said differential wave causes a potential difference of one polarity with respect to said peak hold output and ending when a potential difference of an opposite polarity occurs between said differential wave and said peak hold output;

    an electrical stimulation pulse output means for outputting electrical stimulation pulses during at least part of each of the periods set according to the output pulses of said comparing means, and for stopping the output of electrical stimulation pulses at least at the rise or fall of each of the output pulses of said comparing means.

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