Title :
A CMOS chopper-stabilized differential difference amplifier for biomedical integrated circuits
Author :
Chan, P.K. ; Ng, K.A. ; Zhang, X.L.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
A new CMOS chopper-stabilized differential difference amplifier (CHSDDA) that exploits the combination of chopper technique with differential difference amplifier is proposed, with advantages for use in instrumentation circuits requiring floating differential input and single-ended output. When configured as an instrumentation amplifier (IA), it operates as the analog front-end (AFE) for an electroencephalogram (EEG) recording system in integrated biomedical systems. The measurement results have shown that it achieves 1/f noise reduction, CMRR more than 120 dB (0-700 Hz), dc offset less than 16.5 μV and current drain of 150 μA at a 3 V single supply using a standard 0.6 μm CMOS technology.
Keywords :
1/f noise; CMOS integrated circuits; biomedical electronics; biomedical measurement; choppers (circuits); circuit stability; electroencephalography; instrumentation amplifiers; integrated circuit measurement; integrated circuit noise; 0 to 700 Hz; 0.6 micron; 1/f noise reduction; 150 muA; 3 V; CMOS chopper stabilization technique; CMOS technology; CMRR; EEG recording system; analog front end; biomedical integrated circuits; dc offset; differential difference amplifier; electroencephalogram recording system; floating differential input; instrumentation amplifier; instrumentation circuits; single ended output; Biomedical measurements; CMOS integrated circuits; CMOS technology; Choppers; Current measurement; Differential amplifiers; Electroencephalography; Instruments; Integrated circuit measurements; Noise measurement;
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
DOI :
10.1109/MWSCAS.2004.1354284
