title: A neural amplifier with high programmable gain and tunable bandwidth.
abstract: A neural recording amplifier having programmable gain and bandwidth is presented. The gain can be digitally programmed using 6 bits from 100x to 1100x in steps of 100x. The low-frequency cutoff can be varied from less than 10Hz to above 100Hz to accept or reject field potentials while the high-frequency cutoff is fixed at 9kHz. The input referred noise of this amplifier is 4.8microV(rms) and it consumes 50microW operating from +/-1.5V. Implemented in a 0.5microm technology, the amplifier occupies an area of 0.098mm(2). This amplifier has been successfully demonstrated in-vivo and compared to a commercial amplifier.
authors.affiliation: Engineering Research Center for Wireless Integrated MicroSystems (WIMS ERC), Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, USA. geadara@umich.edu
authors.forename: Gayatri E
authors.initials: GE
authors.lastname: Perlin
authors.forename: Amir M
authors.initials: AM
authors.lastname: Sodagar
authors.forename: Kensall D
authors.initials: KD
authors.lastname: Wise
mesh_terms: D000465:Algorithms; D000669:Amplifiers, Electronic; D004558:Electric Stimulation / Q000295:instrumentation* / Q000379:methods; D004566:Electrodes; D004567:Electrodes, Implanted; D004867:Equipment Design; D006801:Humans; D008839:Microelectrodes; D008962:Models, Theoretical; D009415:Nerve Net; D009474:Neurons / Q000473:pathology