AI Article Synopsis
- Wireless sensing offers a promising method for continuously measuring physiological data, such as intraocular pressure (IOP) in glaucoma patients.
- A compact, ultra-low-power operational amplifier has been designed to facilitate this measurement and can be integrated into implantable wireless systems.
- The amplifier achieves a power consumption of just 736 nW with a chip area of 0.023 mm², making it suitable for low-power applications while maintaining adequate output impedance for driving low-impedance loads.
Article Abstract
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.
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| http://dx.doi.org/10.1109/IEMBS.2007.4353729 | DOI Listing |
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