Switched capacitor filter circuit employing two switched capacit

Details Switched capacitor filter circuit employing two switched capacit Switched capacitor filter circuit employing two switched capacit

1992-03-19

1994-07-05

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328151, 307521, 307353, H03K 500, H03K 5159

Patent

active

053270924

ABSTRACT:
A switched capacitor filter circuit which enables easy adjustment of a post-filter circuit to reduce the power consumption of a switched capacitor filter at a main side. In the switched capacitor filter circuit, a plurality of capacitors having capacitive values weighted by interpolating operation coefficients are provided, and a second SCF, operated at a sufficiently high sampling frequency to suppress unnecessary frequency components through a lower-order analog filter, is used as a post-filter. Further an output of a first SCF at the main side is simultaneously stored in the plurality of capacitors at in the form of charges stored therein so that the charges are sequentially extracted at equi-intervals of a sampling frequency higher than that of the first SCF to perform non-cyclic filtering operation, whereby higher-order interpolating operation of an output of the first SCF is carried out to suppress unnecessary frequency components corresponding to a multiple of the sampling frequency contained in the first SCF output.

REFERENCES:
patent: 4366456 (1982-12-01), Ueno et al.
patent: 4375625 (1983-03-01), Lee
patent: 4546324 (1985-10-01), Bingham et al.
patent: 4644304 (1987-02-01), Temes
patent: 4849662 (1989-07-01), Holberg et al.
patent: 4908579 (1990-03-01), Tawfik et al.

Affiliated with

Also associated with

Rating

Switched capacitor filter circuit employing two switched capacit 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 circuit employing two switched capacit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switched capacitor filter circuit employing two switched capacit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-798540