Switched-capacitance amplifier, a switched-capacitance filter and a charge-transfer filter comprising an amplifier of this type

摘要

The switched-capacitance amplifier comprises n capacitors C11 to C1n which are periodically switched in parallel and in series, the n parallel-switched capacitors being charged simultaneously by the same voltage VE. An amplified voltage nxVE is obtained between the end terminals A and B of the n series-switched capacitors. Periodic switching of the n capacitors in parallel and in series is performed by means of MOS transistors T11 to T1(2n-1) and T21 to T2(n-1) which operate in the switching mode. The n capacitors and the MOS transistors are integrated on the same semiconductor substrate.