Departmental Bulletin Paper 49Design of Low 1 /f Noise Folded Cascode Operational Amplifier by Using Chopper Stabilization Technique

Fadila Norasarin Eritha  ,  Tanno, Koichi

46pp.233 - 239 , 2017-07-31 , 宮崎大学工学部
Biological signals have low voltage and low frequency. Very low noise, high gain, fast speed and stable amplifier are necessary to process these signals. Unfortunately, 1/f noise found at below 1 kHz is unavoidable problem if the amplifier is built by CMOS process. To overcome this problem, CMOS is folded and then cascaded. In order to reduce 1/f noise, chopper stabilization technique is implemented. The circuit were evaluated by using HSPICE simulation with 0.6 μm CMOS process. Using this technique, 1/f noise can be reduced 46.55 dB in average.

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