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SC amplifier and SC integrator with an accurate gain of 2

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3 Author(s)
Kye-Shin Lee ; Dept. of Electr. Eng., Univ. of Texas, Richardson, TX, USA ; Yunyoung Choi ; F. Maloberti

A fully differential switched-capacitor (SC) amplifier and integrator with an accurate gain of 2 are proposed. Both circuits are based on a novel capacitor mismatch compensation scheme which uses the same capacitor as the charge sampling and summing element. Therefore, the gain error which is linearly proportional to the capacitor mismatch in conventional SC circuits becomes proportional to the square of the mismatch. In addition, the proposed scheme does not require additional active blocks, and the valid output is generated within two clock cycles.

Published in:

IEEE Transactions on Circuits and Systems II: Express Briefs  (Volume:52 ,  Issue: 4 )