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Self-biased cross-coupled low-cost fully-differential CMOS operational amplifier

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2 Author(s)
Chen, C.-L. ; Dept. of Electron. Eng., Kun-Shan Univ. of Technol., Tainan, Taiwan ; Chang, Y.-C.

A low-cost fully-differential operational amplifier (opamp) using a novel self-biased cascode output stage and cross-coupled input stage is proposed. Fabricated in only an 84×67 μm2 area with TSMC 0.35 μm technology, and loaded with more than 100 pF capacitance, the opamp possesses 60 dB DC gain, 3 V/μs slew rate, 7.8 MHz unity-gain bandwidth, and -48 dB total harmonic distortion.

Published in:

Electronics Letters  (Volume:41 ,  Issue: 9 )