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A general compensation for a switched-capacitor double-integrator biquad

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3 Author(s)
M. Sasikumar ; Department of Electrical Engineering, Indian Institute of Technology, Madras, India ; K. Radhakrishna Rao ; M. A. Reddy

The finite frequency-dependent gain characteristics of operational amplifiers (op amps) is an important limiting factor in the performance of active switched-capacitor filters at high pole frequencies and high quality factors. A compensation scheme is given to reduce transfer-function errors in a switched-capacitor biquad, due to the finite gain-bandwidth product of the op. amps. Experimental and theoretical results show that the scheme is very useful.

Published in:

IEEE Circuits & Systems Magazine  (Volume:6 ,  Issue: 1 )