Title :
Circuitry for a wireless microsystem for neural recording microprobes
Author :
Yu, Hao ; Najafi, Khalil
Author_Institution :
Center for Wireless Integrated MicroSystems, Univ. of Michigan, MI, USA
Abstract :
Integrated circuits for use in a wireless microsystem used in neural recording are described. The implantable microsystem will be powered and transmit digitized data using RF telemetry. Recorded neural signals are amplified, multiplexed, digitized using a 2nd order sigma-delta modulator, and then transmitted to the outside world by an on-chip transmitter. The circuit is designed using a standard 1.5 μm CMOS process. Several circuit blocks have been designed, fabricated and show to operate as expected.
Keywords :
CMOS integrated circuits; biomedical electrodes; biomedical electronics; biomedical telemetry; demodulators; microelectrodes; sigma-delta modulation; synchronisation; ASK demodulator; RF telemetry; clock recovery circuitry; differential operational transconductance amplifiers; front-end circuitry; implantable microsystem; micromachined microelectrode; multichannel recording; neural recording microprobes; on-chip transmitter; sigma-delta modulator; standard CMOS process; switched capacitor common-mode feedback; wireless microsystem circuitry; Circuits; Coils; Delta-sigma modulation; Power supplies; Radio frequency; Regulators; Signal resolution; Telemetry; Transmitters; Voltage;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1019052
