By Topic

Optimal capacitance assignment of switched-capacitor biquads

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
$31 $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

2 Author(s)
Wing-Hung Ki ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Temes, G.C.

An algorithm is presented for the optimal capacitance assignment of conventional switched-capacitor biquads. It maximizes the dynamic range and minimizes the total capacitance simultaneously, with results presented in analytical forms. This is made possible by the development of a canonical representation of second-order transfer functions in the z-domain, which gives simple relations among three sets of parameters: (1) the pole-and zero-frequencies, and pole- and zero-Q's of the s-domain prototype; (2) the key parameters of the bilinear-transformed z-domain transfer function; and (3) the capacitance ratios of the final switched-capacitor realization. Analytical results are derived and compared with those from using existing assignment techniques. This shows a reduction of 12% in total capacitance for some biquads. An extension of the algorithm to very large time-constant biquads is also discussed; the improvement is even larger for these circuits

Published in:

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on  (Volume:42 ,  Issue: 6 )