A 1.5V 7.5uW programmable gain amplifier for multiple biomedical signal acquisition
暂无分享,去创建一个
This paper presents a programmable analog front-end IC for multiple biomedical signal acquisition. By chopper-stabilized technique with an AC feedback circuit, the proposed circuit rejects differential electrode offset, common-mode disturbance and solves the problem of flicker noise. In TSMC 0.18µm CMOS process, the proposed circuit occupies an active area of 0.38mm2. With digital controls, the voltage gain, low-pass and high-pass cutoff frequency could be adjusted in the range of 52db–88db, 0.5Hz–10Hz and 100Hz–400Hz, respectively. With a supply voltage of 1.5V, the proposed circuit achieves an input-referred noise of 90nV∗Hz⁁−0.5, a noise-efficient factor of 6.1 while consuming a total current of 5µA.
[1] W. Santa,et al. A 2 μW, 95nV/rtHz, chopper-stabilized instrumentation amplifier for chronic measurement of bio-potentials , 2007, 2007 IEEE Instrumentation & Measurement Technology Conference IMTC 2007.
[2] P. K. Chan,et al. A CMOS analog front-end IC for portable EEG/ECG monitoring applications , 2005, IEEE Transactions on Circuits and Systems I: Regular Papers.
[3] R. R. Harrison,et al. A low-power low-noise CMOS amplifier for neural recording applications , 2003, IEEE J. Solid State Circuits.