Title :
A general compensation for a switched-capacitor double-integrator biquad
Author :
Sasikumar, M. ; Rao, K. Radhakrishna ; Reddy, M.A.
Author_Institution :
Dept. of Electrical Engng., Indian Inst. of Technol., Madras, India
fDate :
3/1/1984 12:00:00 AM
Abstract :
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.
Keywords :
active filters; error compensation; integrating circuits; operational amplifiers; switched capacitor networks; switched filters; active switched-capacitor filters; compensation; double-integrator biquad; finite frequency-dependent gain characteristics; finite gain-bandwidth product; high pole frequencies; high quality factors; operational amplifiers; transfer-function error-reduction; Bandwidth; Capacitors; Equations; Operational amplifiers; Resistors; Switches; Switching circuits;
Journal_Title :
Circuits & Systems Magazine
DOI :
10.1109/MCAS.1984.6323981
