title: 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 39.5 dB from 0.3 Hz to 5.4 kHz. The power consumption of the whole system is less than 300 microW/channel from a 5-V supply. The fully integrated system was designed in the AMI 0.6 microm CMOS process and it consumes 0.088 mm(2) channel of chip area.
authors.affiliation: Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA.
authors.forename: Du
authors.initials: D
authors.lastname: Chen
authors.forename: John G
authors.initials: JG
authors.lastname: Harris
authors.forename: Jose C
authors.initials: JC
authors.lastname: Principe