Title :
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
fDate :
Aug. 30 2011-Sept. 3 2011
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;
Conference_Titel :
Engineering in Medicine and Biology Society, EMBC, 2011 Annual International Conference of the IEEE
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-4121-1
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2011.6090810
