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Programmer-for-implanted-pacer

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Programmer for implanted pacer

Details

Inventors: Keller, Jr., John W.; Digby, Dennis; Coombes, Alan;
Assignee: Biotronik Mess- und Therapiegerate GmbH & Co. (Berlin, DE)
Primary Examiner: Kamm; William E.
Assistant Examiner:
Attorney, Agent or Firm: Spencer & Kaye

A plurality of programming bits are placed into a parallel in-serially out register. When the programmer is activated, a monostable resets a counter, and energizes an oscillator which clocks the counter. Three subintervals from the counter are utilized for pulse width modulation of the programming signals. Once for each bit, the output is energized and begins transmitting pulses at the lowest subinterval rate. Depending upon the logic state of each bit, the transmission pulse is terminated either at the second or the third subinterval time.

DETAILED DESCRIPTION According to the invention we provide an external programmer for supplying a fixed number of pulse-width modulated signal bits as a program to an implanted, programmable body function control apparatus which comprises means for preselecting and storing a fixed number of signal bits in a code representative of the program to be supplied to said implanted apparatus and for supplying said code as an output of said means when actuated, counter means for actuating the said code output, means for actuating the counter, and means responsive to said code output for transmitting said program to said implanted apparatus as a sequence of a said fixed number of pulse-width modulated signal bits.

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