A switched-current double sampling bilinear z-transform filter technique

Author

Hughes, John B. ; Moulding, Kenneth W.

Author_Institution

Philips Res. Lab., Surrey, UK

Volume

5

fYear

1994

fDate

30 May-2 Jun 1994

Firstpage

293

Abstract

A filter technique, based on an integrator/summer which performs the bilinear z-transform and achieves two samples per clock period, is described. The operation of the integrator/summer is analysed and this is supported by simulation. As an example, a 3rd order lowpass elliptic ladder filter is designed. Measurement of an IC designed for a cut-off frequency of 8 MHz with sampling at 80 MHz confirm the technique and indicate that operation at sample frequencies beyond 100 MHz is feasible

Keywords

CMOS analogue integrated circuits; Z transforms; active filters; elliptic filters; integrating circuits; ladder filters; low-pass filters; signal sampling; switched current circuits; switched filters; 8 MHz; 80 to 100 MHz; SI filter IC; active filters; bilinear z-transform filter; double sampling type; integrator/summer; lowpass elliptic ladder filter; switched-current filter technique; Adders; Analytical models; Circuit simulation; Clocks; Cutoff frequency; Filters; Frequency measurement; Laboratories; Mirrors; Sampling methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on

Conference_Location

London

Print_ISBN

0-7803-1915-X

Type

conf

DOI

10.1109/ISCAS.1994.409362

Filename

409362