Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Patent
1994-05-02
1997-04-22
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
327552, 327561, 327558, 327337, 333173, 330109, H03B 100, H03K 500
Patent
active
RE0354945
ABSTRACT:
An integrated, low-pass filter of the first order made using the switched capacitors technique utilizes advantageously a single switched capacitor and only two switches in contrast to the filters of the prior art which utilize two switched capacitors and four switches. The filter of the invention requires a smaller integration area and moreover exhibits a greater precision of its DC gain.
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IEEE J. Solid-State Circuits, vol. SC-15, pp. 301-305, Jun. 1980, "A Synchronous Switched Capacitor Filter", by Dessoulavy et al.
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IEEE J. Solid-State Circuits, vol. 67, pp. 61-75, Jan. 1979, "MOS Switched-Capacitor Filters", by Brodersen et al.
IEEE J. Solid-State Circuits, vol. SC-7, pp. 302-304, Aug. 1972, "Analog Sample-Data Filters", by David L. Fried.
IEEE J. Solid-State Circuits, vol. 26, No. 3, Mar. 1991, "Switched-Current Circuit Design Issues", by Fiez et al.
Proceedings of the IEEE, vol. 73, No. 8, Aug. 1985, "A Novel Two-Amplifier Universal Active Switched-Capacitor Filter", by Mohan et al.
Callahan Timothy P.
Formby Betty
Groover Robert
Le Dinh T.
SGS-Thomson Microelectronics S.R.L.
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