A Simplified Model for Passive-Switched-Capacitor Filters With Complex Poles

This brief demonstrates a method to realize complex conjugate poles using passive-switched-capacitor networks. In addition, a simplified continuous-time model will be introduced so that accurate transfer functions and output noise can be obtained without the need for complicated charge-balance equations and thereby allow a better intuitive understanding of these structures. The developed theory is demonstrated through the design of a second-order low-pass Butterworth biquad with applications intended in the design of wireless RF receivers.

[1]  Stefano Manetti,et al.  Switched-capacitor lowpass filter without active components , 1980 .

[2]  Gabor C. Temes,et al.  Introduction to Circuit Synthesis and Design , 1977 .

[3]  Gernot Hueber,et al.  DiscreteTime Processing of RF Signals , 2011 .

[4]  Robert Bogdan Staszewski,et al.  3.8 A fully integrated highly reconfigurable discrete-time superheterodyne receiver , 2014, 2014 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC).

[5]  Ahmad Mirzaei,et al.  Analysis of first-order anti-aliasing integration sampler , 2008, IEEE Transactions on Circuits and Systems I: Regular Papers.

[6]  Mario Salerno,et al.  Commutated capacitor bank as a filter resonator , 1978 .