Title :
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
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 2nd 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;
Conference_Titel :
Microelectronics and Electron Devices, 2004 IEEE Workshop on
Print_ISBN :
0-7803-8369-9
DOI :
10.1109/WMED.2004.1297352
