Title :
Switched-current filter models for frequency analysis in the continuous-time domain
Author_Institution :
Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
A simulation and modeling methodology for switched-current (SI) filters is described, and some results are presented. These results, which differ from the response that a true sampled-data filter would predict from z-plane analysis, demonstrate the need to investigate the complete response of an SI filter to a continuous-time input waveform. It is shown that current mirrors with a large gm:go ratio are required for SI filters, and that the stopband response of many SI filters is strongly dependent on the sampling time of the input sample-and-hold circuit
Keywords :
continuous time filters; sampled data filters; switched current circuits; switched filters; SI filter; continuous-time domain; current mirrors; frequency analysis; input waveform; sample-and-hold circuit; sampling time; stopband response; switched-current filters; Circuit simulation; Clocks; Filtering theory; Filters; Frequency domain analysis; MOSFETs; Mirrors; Switches; Switching circuits; Voltage;
Conference_Titel :
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1281-3
DOI :
10.1109/ISCAS.1993.394001