By Topic

Finite gain compensated double-sampled switched-capacitor integrators for high-Q bandpass filters

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
A. Baschirotto ; Dipartimento di Elettronica, Pavia Univ., Italy ; R. Castello ; F. Montecchi

A technique for the compensation of the operational amplifier (op-amp) finite gain error in the switched-capacitor (SC) integrator is proposed. Two possible SC integrators implementing the proposed technique are given. Both implementations allow the use of the double-sampling technique to increase by a factor of two the maximum speed of operation. The compensation operation consists in memorizing a sequence of output values of the SC integrator, and using them in the proper clock period to compensate the error due to the nonideal virtual ground. The compensation is mostly effective in a narrow frequency range centered around one specific frequency. The circuits implementing this technique are therefore particularly useful for high-Q high-frequency bandpass filters. The case of a biquadratic bandpass filter is reported as an example

Published in:

IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications  (Volume:39 ,  Issue: 6 )