Japanese journal of medical electronics and biological engineering
Online ISSN : 2185-5498
Print ISSN : 0021-3292
ISSN-L : 0021-3292
Fabrication of CMOS Custom LSI for Implantable Telemetry System
Hee Don SEOMasayoshi ESASHITadayuki MATSUO
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1987 Volume 25 Issue 2 Pages 128-134

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Abstract
A custom CMOS LSI for an implantable telemetry system has been developed for acquisition of biomedical informations. This implantable system consists of four parts separated from each other, that is, command receiver, missing pulse decoder, functional memory and conditioner.
They are all fabricated on one single silicon chip of 4×5mm2.
The CMOS LSI's of this system are designed and implemented to get as small size and as low power consumption as possible. A specific implanted sensor is selected by a signal from the external circuit and its output signal is transmitted to the receiver by telemetry.
Another function implemented in the system is baseline adjustment of the implanted sensors by external command signals.
Using an internal pulse powered command receiver the system is capable of disconnecting itself from power source when it is not in use.
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© Japanese Society for Medical and Biological Engineering
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