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

Author

Al-Ashmouny, Khaled ; Chang, Sun-Il ; Yoon, Euisik

Author_Institution

Electr. Eng. & Comput. Sci. Dept., Univ. of Michigan, Ann Arbor, MI, USA

fYear

2011

fDate

Aug. 30 2011-Sept. 3 2011

Firstpage

2945

Lastpage

2948

Abstract

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.

Keywords

amplification; amplifiers; biomedical equipment; biomedical measurement; low-power electronics; neurophysiology; energy-efficiency; fully-integrated low-power 3-bit programmable gain amplifier; multichannel neural recording systems; multiplexed 16-channels neural recording system; multiplexed-input neural recording system; power 8.66 muW; voltage 1 V; Bandwidth; Capacitors; Electronics packaging; Energy efficiency; Gain; Integrated circuits; Multiplexing; Electronics;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

Boston, MA

ISSN

1557-170X

Print_ISBN

978-1-4244-4121-1

Electronic_ISBN

1557-170X

Type

conf

DOI

10.1109/IEMBS.2011.6090810

Filename

6090810