Switched capacitor circuit

Details Switched capacitor circuit Switched capacitor circuit

1986-09-19

1988-05-10

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

330 9, 328167, H03H 701

Patent

active

047438720

ABSTRACT:
A switched capacitor circuit comprises first and second switches connected in series between an input terminal and a first fixed potential terminal and third and fourth switches connected in series between an output terminal and the first fixed potential terminal. The group of the first and fourth switches and the group of the second and third switches are alternately rendered conducting and nonconducting. Two serial capacitors are connected between the junction of the first and second switches and the junction of the third and fourth switches and one parallel capacitor is connected between the junction of the two serially connected capacitors and the first fixed potential. The common junction of the three capacitors is connected to a second fixed potential terminal through a highly resistive element.

REFERENCES:
patent: 4306197 (1981-12-01), Gregorian
patent: 4344050 (1982-08-01), Callahan
patent: 4498063 (1985-02-01), Makabe et al.
patent: 4508982 (1985-04-01), Kapral et al.
patent: 4558292 (1985-10-01), Sasaki et al.
patent: 4623854 (1986-11-01), Kuraishi
T. Hui and D. J. Alstot, "MOS Switched Capacitor Highpass/Notch Ladder Filters," Proc. of International Symp on Circuits and Systems, Houston, TX, Apr. 1980, pp. 309-312.
"Modern Filter Design" by M. S. Ghausi & K. R. Laker (Prentice Hall 1981).

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