A low-power low-noise sensor IC

Author

Guo, Haidong ; Champion, Corbin L. ; Rector, David M. ; La Rue, George S.

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA

fYear

2004

fDate

2004

Firstpage

60

Lastpage

63

Abstract

An IC for acquisition of 16 electrophysiology signals in mice is described. Each channel includes programmable gains from 10 to 1000, a 7 kHz low-pass 4th-order Butterworth filter and a sample and hold. Simulations predict 14-bit accuracy up to 7 kHz. The integrated noise from 1 Hz to 7 kHz is 1.9 μV/Hz¹2 /. The +/-0.3V dc input offset of each channel is cancelled with 7-bit DACs controlling the bulk of the first opamp input transistors and 6-bit DACs on the 2^nd stage. Total power dissipation is 13.5 mW using a 3V supply. Die area is 6 mm² in a 0.25 μ process.

Keywords

Butterworth filters; CMOS analogue integrated circuits; bioelectric potentials; biomedical electronics; digital-analogue conversion; integrated circuit noise; low-pass filters; low-power electronics; operational amplifiers; sample and hold circuits; 13.5 mW; 3 V; 7 kHz; digital-to-analog converters; electrophysiology signals; low-pass Butterworth filter; low-power low-noise IC; multichannel CMOS IC; neural amplifier; operational amplifier; power dissipation; programmable gains; sample and hold; sensor amplifier channel; sensor integrated circuit; small animals; state machine; Animals; Biological neural networks; Cellular neural networks; Electrodes; Electrophysiology; Filters; Integrated circuit noise; Mice; Power dissipation; Predictive models;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics and Electron Devices, 2004 IEEE Workshop on

Print_ISBN

0-7803-8369-9

Type

conf

DOI

10.1109/WMED.2004.1297352

Filename

1297352