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Abstract #21247 Published in IGR 10-2
A compact nanopower low output impedance CMOS operational amplifier for wireless intraocular pressure recordings
Dresher RP; Irazoqui PPConference proceedings : Annual International Conference of the IEEE Engineering in Medicine and Biology Society 2007; 2007: 6056-6059
Wireless sensing has shown potential benefits for the continuous-time measurement of physiological data. One such application is the recording of intraocular pressure (IOP) for patients with glaucoma. Ultra-low-power circuits facilitate the use of inductively-coupled power for implantable wireless systems. Compact circuit size is also desirable for implantable systems. As a first step towards the realization of such circuits, we have designed a compact, ultra-low-power operational amplifier which can be used to record IOP. This paper presents the measured results of a CMOS operational amplifier that can be incorporated with a wireless IOP monitoring system or other low-power application. It has a power consumption of 736 nW, chip area of 0.023 mm2, and output impedance of 69 Omega to drive low-impedance loads.
Dr. R.P. Dresher, Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609 USA. rdresher@purdue.edu
Classification:
6.1.1 Devices, techniques (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)