Conference paper
A low-noise/low-power preamplifier for capacitive microphones
In
Proceedings of the Ieee International Symposium on Circuits and Systems
—
1996, Volume 1, pp. 477-480
Abstract
A design for a microphone preamplifier for application in hearing aids is presented. The amplifier operates at a supply of 1-1.5 V, the current drain is 40 μA. The maximum sound level allowed is more than 120 dB SPL (Sound Pressure Level), with a typical noise level of 25 dB(A) SPL (A-weighted). The amplifier is optimized for a capacitive microphone with a capacitance of 1.2 pF.
The amplifier is fully integrated in a 0.7 μm n-well CMOS technology. Design details concerning noise performance are analytically described
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 1996 |
| Pages: | 477-480 |
| Proceedings: | 1996 IEEE International Symposium on Circuits and Systems |
| Journal subtitle: | Connecting the World |
| ISBN: | 0780330730 and 9780780330733 |
| Types: | Conference paper |
| DOI: | 10.1109/ISCAS.1996.539988 |
Keywords
