Patent ID: 8629797
Filing Date: 2014-01-14
Classification: H03M

Abstract:
1. A switched capacitor circuit configured to be operable in two or more kinds of operation modes including a first operation mode and a second operation mode, wherein the switched capacitor circuit comprises an amplifier and two or more internal capacitors with switches for controlling connection/disconnection of the capacitor; in the first operation mode that precedes the second operation mode, the switched capacitor circuit generates a first analog output voltage by using the first internal capacitor connected between an input terminal and output terminal of the amplifier by using its switches, the other internal capacitances connected between an input terminal of the amplifier and each analog input voltage supply by using its switches; and in the second operation mode that follows the first operation mode, the switched capacitor circuit generates a second analog output voltage with larger feedback factor of the amplifier than it in the first operation mode, by disconnecting some of the internal capacitors, except the first internal capacitor, from the first operation mode.