摘要 |
A discrete-time analog circuit comprises: a voltage-current conversion circuit that converts an input voltage signal into a current signal and outputs the current signal; and a charge inverting circuit that is connected to an output terminal of the voltage-current conversion circuit to perform charge sharing. The charge inverting circuit includes 2M capacitors (M is an integer greater than or equal to 1) that are provided parallel to each other. In accordance with a predetermined sampling interval, one of the 2M capacitors repeats: (1) sharing input charge that is input by the current signal, (2) holding at least part of the input charge, (3) inverting a polarity of the held charge and connecting to the output terminal to share the held charge, and (4) holding remaining charge. At time period when one of the 2M capacitors is connected to the output terminal, the other capacitor(s) of the 2M capacitors is not connected to either of an input terminal and the output terminal. |