A self-tuning digital telemetry IC for use in a microprocessor-based implantable instrument

Author

Fernald, Kenneth W. ; Paulos, John J. ; Stackhouse, Blaine A. ; Heaton, Robert A.

Author_Institution

Intermedics Inc., Angleton, TX, USA

Volume

27

Issue

12

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

1826

Lastpage

1832

Abstract

An implantable digital telemetry integrated circuit that uses an automatic resonant-frequency search technique to adapt to antenna variations is presented. A VCO and an amplitude detector are used to search for the antenna´s resonant frequency at the start of each transmission. The chip is designed to meet the communication requirements of a microprocessor-based telemetry system for the fast prototyping of implantable instruments for biomedical research applications. A full implementation of the telemetry IC, measuring 2.5 mm×2.9 mm, was fabricated in a 1.2 μm low-voltage CMOS process and tested with good results

Keywords

CMOS integrated circuits; bioelectric potentials; biomedical electronics; biomedical measurement; digital integrated circuits; medical computing; prosthetics; telemetering equipment; 1.2 micron; VCO; amplitude detector; antenna variations; automatic resonant-frequency search technique; bidirectional telemetry IC; biomedical research; biopotentials; fast prototyping; low-voltage CMOS process; microprocessor-based implantable instrument; self-tuning digital telemetry IC; Adaptive arrays; Detectors; Digital integrated circuits; Instruments; Prototypes; Resonance; Resonant frequency; Telemetry; Transmitting antennas; Voltage-controlled oscillators;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.173112

Filename

173112