INDUCTIVELY POWERED TELEMETRY SYSTEM FOR TEMPERATURE, ECG, AND ACTIVITY MONITORING

  • 1 January 1978
    • journal article
    • research article
    • Vol. 5  (2) , 53-76
Abstract
An implant telemetry system for the simultaneous monitoring of temperature, activity and ECG from small animals, e.g., rats, was designed with the novel feature that instead of a battery the system is energized by an inductive field. A 250 kHz resonant coil surrounds the cage (30 .times. 30 .times. 20 cm) and provides the approximately 100 .mu.W of power required to operate the implant transmitter while allowing the animal unrestrained movement in the cage. The implant can also be battery-operated if desired. RF [radio freqency] transmission is in the 8-10 MHz band, allowing the use of a simple, essentially single IC chip, receiver.

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