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Digital cardiac pacemaker clocking means

  • US 4,275,738 A
  • Filed: 11/06/1978
  • Issued: 06/30/1981
  • Est. Priority Date: 11/06/1978
  • Status: Expired due to Term
First Claim
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1. A digitally controlled cardiac pacemaker pulse generator powered by an electrical power source for providing cardiac stimulating pulses at a defined rate and at a defined pulse width, said pulse generator comprising:

  • clock means for providing a series of clock pulses;

    a resettable first counter for counting clock pulses applied thereto;

    means for coupling said series of clock pulses to said first counter;

    a second counter for counting pulses applied thereto;

    counter interface means responsive to said first counter for providing a counting pulse to said second counter each time said first counter reaches a first count and for resetting said first counter;

    rate decoding means responsive to the count of said second counter reaching a defined value for providing a signal manifesting that a cardiac stimulating pulse is to be provided;

    pulse width decoding means responsive to said rate decoding means signal and the count of said first counter reaching a defined value for providing a signal manifesting the desired pulse width of said cardiac stimulating pulse; and

    output means responsive to said rate decoding means signal and said pulse width decoding means signal for providing said cardiac stimulating pulse.

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