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Implantable externally programmable microprocessor-controlled tissue stimulator

  • US 4,592,360 A
  • Filed: 12/20/1982
  • Issued: 06/03/1986
  • Est. Priority Date: 10/09/1980
  • Status: Expired due to Term
First Claim
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1. An implantable tissue stimulator, comprisingat least one stimulation electrode,a slow clock,a fast clock,first and second presettable down counting means each producing a timed-output indicative of counting down to zero from a preset number, and each having a preset input and a clock input, said first and second counting clock inputs being connected to said slow clock and said fast clock respectively,means for enabling said fast clock in response to said timed-out output of said first counting means,logic means for beginning an output pulse in response to said timed-out output of said first counting means and ending said output pulse in response to the timed-out output of said second counting means,means for applying a stimulation output pulse corresonding to said output pulse from said logic means to said electrode,said means for enabling said fast clock including a fast clock enabler multiplexer having an output, anda clock selector multiplexer having a first input connected to the output of said fast clock enabler multiplexer and having a second input connected to said slow clock, said clock selector multiplexer applying selectively either the fast clock or slow clock to a clock input of a microprocessor.

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