Title :
A neural amplifier with high programmable gain and tunable bandwidth
Author :
Perlin, Gayatri E. ; Sodagar, Amir M. ; Wise, Kensall D.
Author_Institution :
Engineering Research Center for Wireless Integrated MicroSystems (WIMS ERC), Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, 48109, USA
Abstract :
A neural recording amplifier having programmable gain and bandwidth is presented. The gain can be digitally programmed using 6 bits from 100× to 1100× in steps of 100×. 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 4.8μVrms and it consumes 50μW operating from ±1.5V. Implemented in a 0.5μm technology, the amplifier occupies an area of 0.098mm2. This amplifier has been successfully demonstrated in-vivo and compared to a commercial amplifier.
Keywords :
Bandwidth; CMOS technology; Circuits; Electrodes; High power amplifiers; Low-noise amplifiers; Operational amplifiers; Power amplifiers; Signal processing; Silicon on insulator technology; Algorithms; Amplifiers, Electronic; Electric Stimulation; Electrodes; Electrodes, Implanted; Equipment Design; Humans; Microelectrodes; Models, Theoretical; Nerve Net; Neurons;
Conference_Titel :
Engineering in Medicine and Biology Society, 2008. EMBS 2008. 30th Annual International Conference of the IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4244-1814-5
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2008.4649873
