A CMOS ultrasound range-finder microsystem
Authors:
- Qiuting HuangQHQiuting Huang
- 1 December 2000
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 35 (12) , 2005-2017
Abstract
A miniaturized ultrasound range finder in a standard 0.8-/spl mu/m CMOS technology is described. It uses thermally excited silicon membrane transducers to generate or detect ultrasound at 100 kHz and can measure distances up to 11 cm with an accuracy of 2.5 mm. The distance sensor is based on a quasi-continuous measurement requiring coherent ultrasound waves, that are delivered by an electro-mechanical phase locked loop. Circuit and system techniques as well as package considerations are presented which allow the range finder to be implemented as a fully integrated 0.8-/spl mu/m CMOS microsystem.Keywords
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