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A BiFET automatic gain control amplifier for hearing aids

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2 Author(s)
Sykes, F.E. ; Res. & Dev., GENNUM Corp., Burlington, Ont., Canada ; Armstrong, S.

This paper describes an audio band automatic gain control (AGC) amplifier implemented in Bipolar/JFET(Vp=0.3 V) technology and is targeted for high performance hearing aid applications. A unique AGC topology was used where the AGC function is split into feedback and feedforward sections. The amplifier provides variable compression ratios from 1:1 to 4:1 compression, 4 pole bandsplit filter, and dualtime constant average signal detection. The single IC consumes only 0.3 mW from a 1 V supply

Published in:

Custom Integrated Circuits Conference, 1996., Proceedings of the IEEE 1996

Date of Conference:

5-8 May 1996

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