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External transmitter for implanted medical device

  • US 6,477,425 B1
  • Filed: 12/23/1999
  • Issued: 11/05/2002
  • Est. Priority Date: 12/23/1999
  • Status: Expired due to Term
First Claim
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1. A battery powered external power source for powering an implanted medical device having a receiver coil, of the type that inductively couples energy to the receiver coil through the skin of a patient, wherein the power source includesa first battery operated power supply and a second battery operated power supply, an FPGA powered by the first battery operated power supply, a class D amplifier powered by the second battery operated power supply, a local oscillator providing an input signal to the FPGA and, an antenna driven by the class D amplifier to inductively couple energy to the receiver coil, wherein the FPGA produces a modulation controlled pulse of RF frequency energy as an input for amplification by said amplifier to drive the antenna.

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