DocumentCode
424604
Title
A low-power AGC with level-independent phase margin
Author
Baker, Michael W. ; Lu, Timothy K T ; Sarpeshkar, Rahul
Author_Institution
Dept. of Electr. Eng. Comput. Sci., Massachusetts Inst. of Technol., Cambridge, MA, USA
Volume
1
fYear
2004
fDate
June 30 2004-July 2 2004
Firstpage
386
Abstract
We describe a 32-/spl mu/W 77dB-dynamic-range power-law-compression VLSI AGC circuit for use in audio applications particularly for hearing aids and cochlear implants. We demonstrate that in spite of the nonlinearities in the circuit, the feedback-loop phase margin is invariant with input level. This ensures that robust performance at one level guarantees robust performance at any level.
Keywords
VLSI; automatic gain control; control nonlinearities; feedback; stability; 32 muW; VLSI AGC circuit; circuit nonlinearities; feedback-loop phase margin; level-independent phase margin; low-power AGC;
fLanguage
English
Publisher
ieee
Conference_Titel
American Control Conference, 2004. Proceedings of the 2004
Conference_Location
Boston, MA, USA
ISSN
0743-1619
Print_ISBN
0-7803-8335-4
Type
conf
Filename
1383635
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