A Bio-amplifier With Pulse Output

Abstract

A low-power fully integrated bioamplifier is presented that can amplify signals in the range from mHz to kHz while rejecting large DC offsets generated at the electrode-tissue interface. The novel aspect of this amplifier is that its analog output is represented by a series of pulses which provide a low-power, noise-resistant means for coding and transmission. The original analog signal can be reconstructed from the resulting pulse train with 13 bit precision at a remote site where power consumption is not so crucial. The fabricated analog amplifier exhibits a gain of 39.5dB from 0.3 Hz to 5.4k Hz. The power consumption of the whole system is less than 300 μW/channel from a 5-V supply. The fully integrated system was designed in the AMI 0.6μm CMOS process and it consumes 0.088 mm2/channel of chip area.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Bio-amplifier; CMOS; Low power; Pulse train

International Standard Serial Number (ISSN)

0589-1019

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Institute of Electrical and Electronics Engineers, All rights reserved.

Publication Date

01 Dec 2004

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