Integrated active low-pass filter of the first order

Details Integrated active low-pass filter of the first order Integrated active low-pass filter of the first order

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.

REFERENCES:
patent: 4453130 (1984-06-01), Bennett
patent: 4513265 (1985-04-01), Sokoloff
patent: 4633223 (1986-12-01), Senderowicz
patent: 4754226 (1988-06-01), Lusignan et al.
patent: 4769612 (1988-09-01), Tamakoshi et al.
IEEE J. Solid-State Circuits, vol. SC-15, pp. 301-305, Jun. 1980, "A Synchronous Switched Capacitor Filter", by Dessoulavy et al.
IEEE J. Solid-State Circuits, vol. SC-16, pp. 724-729, Dec. 1981, "Simplified MOS Switched Capacitor Ladder Filter Structures", Allstot et al.
IEEE J. Solid-State Circuits, vol. 71, pp. 967-986, Aug. 1983, "Technological Design Considerations for Monolithic MOS Switched-Capacitor Filtering Systems", by Allstot et al.
IEEE J. Solid-State Circuits, vol. 71, pp. 926-940, Aug. 1983, "Principles of Operation and Analysis of Switched-Capacitor Circuits", by Yannis Tsvidis.
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.

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