Title :
Switched-capacitor decimation filters with direct form polyphase structure having very small sensitivity characteristics
Author :
Petraglia, Antonio ; Pereira, Jacqueline S.
Author_Institution :
Dept. of Electr. Eng., Fed.. Univ. of Rio de Janeiro, Brazil
Abstract :
A novel approach for the realization of switched-capacitor decimation filters is proposed. The design process is based on the optimum allocation of poles and zeros of a transfer function, so that the best compromise is achieved between filter complexity and sensitivity with respect to capacitance ratio errors. Analytical boundaries enclosing the feasible frequency responses for a given nominal design and specified capacitance ratio tolerance are used, enabling quick and reliable statistical sensitivity comparisons without the need for Monte Carlo simulations. Results are shown for an illustrative design example of a video-frequency decimation filter. A prototype filter has been built and tested in the laboratory to validate the theory, and measurement results are included
Keywords :
Monte Carlo methods; circuit simulation; frequency response; pole assignment; sensitivity analysis; switched capacitor filters; video signal processing; zero assignment; Monte Carlo simulations; capacitance ratio errors; capacitance ratio tolerance; design process; direct form polyphase structure; feasible frequency responses; filter complexity; optimum allocation; poles; sensitivity characteristics; statistical sensitivity comparisons; switched-capacitor decimation filters; video-frequency decimation filter; zeros; Capacitance; Error analysis; Filtering theory; Filters; Frequency; Poles and zeros; Process design; Prototypes; Testing; Transfer functions;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780622