Switched capacitor filter

Details Switched capacitor filter Switched capacitor filter

1980-05-16

1981-09-15

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

328167, H03H 1900

Patent

active

042900344

ABSTRACT:
A switched capacitor filter circuit which closely matches single pole RC filters at voice frequency. The filter pole is determined by the ratio of a first and second capacitor (C.sub.1 and C.sub.2). Any resulting loss is compensated for by an operational amplifier (13) in combination with third and fourth capacitors (C.sub.3 and C.sub.4) operating as a voltage divider circuit. A switch (16) may be provided for discharging one of the latter capacitors during nonsampling intervals. A further switch (17) may also be provided to cancel charge due to gate-to-drain overlap of the first switch.

REFERENCES:
patent: 3469213 (1969-09-01), Baker
patent: 3514726 (1970-05-01), Poschenrieder
Brodersen et al-"MOS Switched-Capacitor Filters", Proc. of the IEEE, vol. 67, No. 1, Jan. 1979; pp. 61-75.
Fried-"Analog Sample-Data Filters", IEEE Journal of Solid-State Circuits, vol. SC-7, Aug. 1972; pp. 302-304.

Affiliated with

Also associated with

Rating

Switched capacitor filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switched capacitor filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switched capacitor filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-392965