NDLI: A note on some early work in the field of switched-capacitor networks

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A note on some early work in the field of switched-capacitor networks

Content Provider	IEEE Xplore Digital Library
Author	Weinrichter, H.
Copyright Year	1979
Abstract	Some early work in the field of switched-capacitor filters, which has been done in Europe since about 1960, is discussed. In particular, reasons are given as to why the early (and some later) approaches in Europe went in quite a different direction from switched-capacitor filter design in the United States. In contrast to the later approaches, which were dominated by the idea of substituting switched capacitors instead of resistances, mostly in order to realize unidirectional signal-flow graph filters, the early European concepts concentrated on the simulation of pure reactances by means of capacitances and special switches, which could achieve lossless charge transfer in order to simulate doubly terminated reactance filters. Modern descendants of this type of filters are the switched-capacitor filters using voltage inverter switches. Since these filters are operated bidirectionally, very useful equivalences to time-invariant circuits and network theorems concerning stability and passivity can be derived. An outline of the fundamental ideas that have led to such equivalences is presented.
Starting Page	3
Ending Page	8
Page Count	6
File Size	1278845
File Format	PDF
ISSN	01636812
Volume Number	6
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1984-12-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Charge transfer Capacitors Filtering theory RLC circuits Digital filters Microwave filters
Content Type	Text
Resource Type	Article

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