DocumentCode :
1839507
Title :
A reconfigurable IC for wireless monitoring of chemical or electrical neural activity
Author :
Roham, Masoud ; Mohseni, Pedram
Author_Institution :
Electr. Eng. & Comput. Sci. Dept., Case Western Reserve Univ., Cleveland, OH
fYear :
2008
fDate :
18-21 May 2008
Firstpage :
1978
Lastpage :
1981
Abstract :
A reconfigurable integrated circuit for single-channel wireless monitoring of chemical or electrical neural activity is described. It can perform both amperometry and fast-scan cyclic voltammetry (FSCV) when configured for neurochemical sensing, and can record extracellular action potentials as well as local field potentials (LFPs) when configured for electrophysiological studies. The chip architecture employs a third-order DeltaSigma modulator (DeltaSigmaM) and a frequency-shift-keyed (FSK) transmitter operating near 433 MHz. It also incorporates a programmable arbitrary waveform generator for FSCV measurements. The chip is fabricated using the AMI 0.5 mum 2P/3M n-well CMOS process, and achieves a measured current resolution of 94.1 pArms in a 5-kHz bandwidth for 300-V/s FSCV and an input-referred noise voltage of 4.69 muVrms in a bandwidth of 1.1-5 kHz. The modulator core, FSCV waveform generator, and RF transmitter draw ~28 muA, ~40 muA, and ~400 muA from a 2.5-V power supply, respectively.
Keywords :
CMOS integrated circuits; amperometric sensors; delta-sigma modulation; frequency shift keying; monitoring; transmitters; voltammetry (chemical analysis); CMOS; DeltaSigma modulator; amperometry; chemical neural activity; electrical neural activity; fast-scan cyclic voltammetry; frequency-shift-keyed transmitter; local field potentials; neurochemical sensing; reconfigurable integrated circuit; wireless monitoring; Bandwidth; Chemicals; Extracellular; Frequency shift keying; Monitoring; Power capacitors; Semiconductor device measurement; Signal generators; Transmitters; Wireless sensor networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-1683-7
Electronic_ISBN :
978-1-4244-1684-4
Type :
conf
DOI :
10.1109/ISCAS.2008.4541833
Filename :
4541833
Link To Document :
بازگشت