Band pass filter with a switched capacitor

Details Band pass filter with a switched capacitor Band pass filter with a switched capacitor

1982-07-02

1985-05-28

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307296R, 307491, 307510, 307246, 328151, 333173, H03H 1112, H03K 17693

Patent

active

045202834

ABSTRACT:
A switched capacitor circuit has: first and second power sources; an operational amplifier driven by the power sources; a feedback capacitor connected to the inverting input terminal and the output terminal of the amplifier; a switched capacitor connected between a signal input terminal which receives an input signal voltage and the inverting input terminal of the amplifier; switching circuits for controlling the charging and discharging operations of the switched capacitor; and a bias circuit which is connected between the power sources and which applies a predetermined voltage to the non-inverting input terminal of the amplifier.

REFERENCES:
patent: 3814957 (1974-06-01), Way
patent: 4260946 (1981-04-01), Wheatley, Jr.
patent: 4313096 (1982-01-01), Fleischer
patent: 4333064 (1982-06-01), Kato et al.
patent: 4378538 (1983-03-01), Gignoux
Davis, "Switched-Capacitor Techniques Implement Effective IC Filters," EDN, Nov. 5, 1979, at 103-108.
Brodersen et al., "MOS Switched-Capacitor Filters", 67 IEEE Proc. 61-75 (Jan. 1979).
Bosshart, "A Multiplexed Switched Capacitor Filter Bank", IEEE JSSC, vol. SC-15, No. 6, Dec. 1980, pp. 939-945 (333/173).
Gregorian, "Filtering Techniques With Switched-Capacitor Circuits", Microelectronics Journal, vol. 11, No. 2, Mackintosh Pubs. Ltd., 4-1980, 13-21.

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