Switched capacitor high-pass filter

Details Switched capacitor high-pass filter Switched capacitor high-pass filter

H - Electricity

03

H

333/50

H03H 7/01 (2006.01) H03H 19/00 (2006.01)

Patent

CA 1206542

SWITCHED CAPACITOR HIGH-PASS FILTER Abstract: A switched capacitor MOS high-pass filter includes a blocking capacitor which accepts an input signal at one side. A first electronic toggle switch connects the gate of a depletion-mode buffer transistor alternately to the other side of the blocking capacitor and to ground in response to a pair of non-overlapping switching pulse trains. A depletion- mode transistor provides current to the buffer transistor. One side of an output capacitor is connected to the source of the buffer transistor. A second toggle switch connects the other side of the output capacitor alternately to an output terminal and to ground. Also disclosed is a filter which includes a correction network to eliminate from the output signal the effect of a feed-through error voltage generated by the action of the first switch.

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