Switched capacitor filter

Details Switched capacitor filter Switched capacitor filter

2005-05-10

2005-05-10

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S337000

Reexamination Certificate

active

06891429

ABSTRACT:
Embodiments of the present invention relate to a switched-capacitor filter which comprises a first stage which itself comprises a first switched capacitor, a second stage which itself comprises a second switched capacitor, a switched capacitive element that couples the output of the first stage to the input of the second stage, and a non-switched capacitive element coupled from the output of the second stage to the input of the first stage to provide damping of the switched-capacitor filter. Both stages are implemented as inverting analog amplifiers and the filter is especially well suited to semiconductor manufacture. The switched capacitor filter is implemented as part of a user module in a programmable system on a chip, or PSoC.

REFERENCES:
patent: 4315227 (1982-02-01), Fleischer et al.
patent: 4492935 (1985-01-01), Fleischer et al.
patent: 4531106 (1985-07-01), Ganesan
patent: 4802236 (1989-01-01), Walczak et al.
patent: 5479130 (1995-12-01), McCartney
patent: 6023191 (2000-02-01), Connell et al.

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