Switched capacitor arrangement

Details Switched capacitor arrangement Switched capacitor arrangement

H - Electricity

03

M

354/153

H03M 1/06 (2006.01) G06G 7/184 (2006.01) G06G 7/186 (2006.01) H03F 3/345 (2006.01) H03M 3/02 (2006.01)

Patent

CA 1293813

ABSTRACT An integrator of a Sigma-Delta modulator includes an amplifier having an inverting input terminal and an output terminal. An integrating capacitor is coupled between the input and output terminals. An input signal is coupled via a switched capacitor arrangement to the input terminal. The switched capacitor arrangement includes first and second transmission gates, operating at a first frequency, and a second capacitance that are coupled in series. In each period of the operation of the transmission gates, the first transmission gate is turned off before the second transmission gate for preventing a charge injected by the second transmission gate when the second transmission gate is turned off from being coupled to the input terminal of the amplifier.

582157

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