Top-down design of a switched-current video filter

Author

Hughes, J.B.

Author_Institution

Philips Res. Lab., Redhill, UK

Volume

147

Issue

1

fYear

2000

fDate

2/1/2000 12:00:00 AM

Firstpage

73

Lastpage

81

Abstract

A case study for the design of switched-current filters is presented. While the emphasis is on the step-by-step numerical design of a video filter, the design flow is applicable to any switched current filter. The chosen design example is a low pass elliptic ladder filter with the following specification: passband 0.5 dB equiripple, stop-band attenuation >30 dB, -3 dB frequency of 8 MHz, sampling frequency of 80 MHz. Signal-to-noise ratio of 60 dB. All aspects of the design are covered from filter specification: through filter synthesis, circuit definition and finally transistor sizing for CMOS implementation

Keywords

CMOS analogue integrated circuits; circuit CAD; circuit optimisation; integrated circuit design; network synthesis; radiofrequency filters; signal flow graphs; switched current circuits; switched filters; 8 MHz; 80 MHz; CMOS implementation; SFG; SI filter; dynamic range optimisation; filter specification; filter synthesis; low pass elliptic ladder filter; numerical design; switched-current video filter; top-down design; transistor sizing;

fLanguage

English

Journal_Title

Circuits, Devices and Systems, IEE Proceedings -

Publisher

iet

ISSN

1350-2409

Type

jour

DOI

10.1049/ip-cds:20000014

Filename

836514