DocumentCode
907648
Title
Switched current filters
Author
Hughes, J.B. ; Macbeth, I.C. ; Pattullo, D.M.
Author_Institution
Philips Res. Labs., Redhill, UK
Volume
137
Issue
2
fYear
1990
fDate
4/1/1990 12:00:00 AM
Firstpage
156
Lastpage
162
Abstract
`Switched Currents´ is a new analogue sampled-data signal processing technique that can be implemented without the need for linear floating capacitors. This feature enables signal processors to be integrated in a standard digital VLSI process (CMOS), making the technique ideally suited for mixed analogue/digital ICs. Switched current cells are described, and a configuration for a universal integrator is developed that is exactly equivalent to a switched capacitor counterpart. With this integrator, complete switched current filters may be constructed from switched capacitor prototypes. This is demonstrated by the `exact´ design and simulation of a sixth order lowpass filter with a cutoff frequency of 5 MHz
Keywords
CMOS integrated circuits; VLSI; active filters; integrating circuits; linear integrated circuits; switched filters; CMOS; analogue sampled-data; cutoff frequency; mixed analogue/digital ICs; monolithic active filters; signal processing technique; sixth order lowpass filter; standard digital VLSI process; switched capacitor prototypes; switched current filters; universal integrator;
fLanguage
English
Journal_Title
Circuits, Devices and Systems, IEE Proceedings G
Publisher
iet
ISSN
0956-3768
Type
jour
Filename
217051
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