An implantable digital telemetry integrated circuit using an automatic resonant-frequency search technique

An integrated circuit is presented which uses a voltage-controlled oscillator (VCO) and amplitude detector to search for the resonant frequency prior to each transmission, thus guaranteeing resonant operation despite variations in either antenna or integrated circuit characteristics. A block diagram...

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Bibliographic Details
Main Authors: Fernald, K.W., Paulos, J.J., Stackhouse, B.A., Heaton, R.A.
Format: Conference Proceeding
Language:English
Subjects:
Detectors
Digital integrated circuits
Driver circuits
Phase modulation
Phase shift keying
Resonance
Resonant frequency
Telemetry
Voltage control
Voltage-controlled oscillators
Online Access:Request full text
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Description
Summary:An integrated circuit is presented which uses a voltage-controlled oscillator (VCO) and amplitude detector to search for the resonant frequency prior to each transmission, thus guaranteeing resonant operation despite variations in either antenna or integrated circuit characteristics. A block diagram of the transmitter is shown. The transmitter design is combined with a simpler on-off keying receiver and the necessary digital logic to support bidirectional digital telemetry.< >
DOI:10.1109/ISSCC.1992.200414