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A 8.6 μW 3-bit programmable gain amplifier for multiplexed-input neural recording systems

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3 Author(s)
Al-Ashmouny, K. ; Electr. Eng. & Comput. Sci. Dept., Univ. of Michigan, Ann Arbor, MI, USA ; Sun-Il Chang ; Euisik Yoon

We report a fully-integrated low-power 3-bit programmable-gain amplifier (PGA) that can be used as the second stage amplifier to adjust the gain for multi-channel neural recording systems. The design strategy maximizes energy-efficiency using a technique by optimizing a slew rate, gain and phase margin. The PGA consumes 8.66μW from 1-V single supply. This is an order of magnitude lower than the previous designs reported up to date. Analysis, simulation, and measurement results will be described in detail for a part of a multiplexed 16-channels neural recording system. In this implementation, while giving a full flexibility of gain control, the overhead for each channel is quite negligible: only 0.54μW in power and less than 0.002mm2 in area.

Published in:
Engineering in Medicine and Biology Society,EMBC, 2011 Annual International Conference of the IEEE

Date of Conference: Aug. 30 2011-Sept. 3 2011

Page(s):
2945 - 2948
ISSN :
1557-170X
E-ISBN :
978-1-4244-4122-8
Print ISBN:
978-1-4244-4121-1
INSPEC Accession Number:
12424723
Conference Location :
Boston, MA
Digital Object Identifier :
10.1109/IEMBS.2011.6090810
Product Type:
Conference Publications
PubMed ID :
22254958

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