A readout circuit for an intra-ocular pressure sensor

被引：50

作者：

Coosemans, J ^{[1
]}

Catrysse, M ^{[1
]}

Puers, R ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept ESAT MICAS, B-3001 Heverlee, Belgium

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2004年 / 110卷 / 1-3期

关键词：

intra-ocular pressure; passive telemetry; micro coils; readout circuit;

D O I：

10.1016/j.sna.2003.09.015

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A readout circuit for a passive telemetric intra-ocular pressure (IOP) sensor is being developed. The intra-ocular sensor consists of capacitive pressure sensor in parallel with a planar coil. This inductor-capacitor (LC) resonant circuit transduces the pressure into a of resonance frequency. A voltage controlled oscillator (VCO) is used to excite the sensor over a large frequency range hereby detecting resonance of the internal sensor, and thus enabling the measurement of the intra-ocular pressure. This low power is extremely compact, making it suitable for long-term ambulant patient monitoring. The circuit allows wireless readout of the pressure transducers. Tests show promising results at mutual coil distances up to 7.5 mm. (C) 2003 Published by Elsevier B.V.

引用

页码：432 / 438

页数：7

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