Title :
A CMOS instrumentation amplifier for wideband bioimpedance spectroscopy systems
Author :
Zhao, Yi-Qiang ; Demosthenous, Andreas ; Bayford, Richard H.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. Coll. London
Abstract :
Electrical bioimpedance spectroscopy is a fast and relatively easily applicable method for tissue characterization. This paper describes a CMOS instrumentation amplifier based on the principle of current feedback for use in this application. The amplifier was designed in a 0.35 mum CMOS technology and dissipates 420 muW from plusmn1.5 V power supplies. Simulations showed that it has a bandwidth of 2 kHz-1 MHz, a mid-band gain of 20 dB, a CMRR of 101 dB at 1 MHz, and an input-referred noise voltage floor of 11.5 nV/radicHz
Keywords :
CMOS integrated circuits; bioelectric phenomena; biological tissues; biomedical measurement; electric impedance measurement; instrumentation amplifiers; spectroscopy; 0.35 micron; 1 MHz; 1.5 V; 2 to 1000 kHz; 20 dB; 420 muW; CMOS instrumentation amplifier; current feedback; electrical bioimpedance spectroscopy; tissue characterization; wideband bioimpedance spectroscopy systems; Bandwidth; Bioimpedance; Broadband amplifiers; CMOS technology; Feedback; Gain; Instruments; Power amplifiers; Power supplies; Spectroscopy;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693774
