Design of low power CMOS subthreshold current mode instrumentation amplifier based on CCII
This paper describes the design of a low power current mode instrumentation amplifier dedicated to biomedical applications based on current conveyor. All MOSFETs operate in the subthreshold region yielding high energy efficiency using a single ended 0.4V supply. It's designed using standard CMOS technology which can be easily integrated into VLSI circuits. The design procedure is explained and verified by post layout results presented using TSMC 90 nm technology. Chopping technique is applied to reduce flicker noise to 3.59 mVrms for bandwidth 0.2 150 Hz. A high common mode rejection ratio of 107 dB is achieved while consuming 5.5 mW with maximum gain 41 dB. The chip area is 0.023 mm2. The obtained results demonstrate that well designed current mode circuits in subthreshold are an attractive solution for portable biomedical applications.
2016 IEEE 59th International Midwest Symposium on Circuits and Systems (MWSCAS)