Patent ID: 9143148
Filing Date: 2015-09-22
Classification: G09G,H03M

Abstract:
1. An amplification circuit comprising: an operational amplifier with a first input terminal connected to a reference node; a first capacitor provided between a first node and the reference node; a second capacitor provided between a second node and the reference node; a first switch element provided between the first node and an input node of an input voltage; a second switch element provided between the first node and a supply node of a first analog reference voltage; a third switch element provided between the second node and an output node of an output voltage; a fourth switch element provided between the second node and a supply node of a second analog reference voltage; and a fifth switch element provided between the output node of the output voltage and the reference node, wherein the input voltage changes in a range between a first voltage and a second voltage, the second voltage and a third voltage are supplied to the operational amplifier as a first power supply voltage and a second power supply voltage, respectively, the first analog reference voltage is a direct-current voltage between the first voltage and the second voltage, the second analog reference voltage is a direct-current voltage between the second voltage and the third voltage, and the first voltage, the second voltage and the third voltage are different from one another, and the second voltage is a voltage between the first voltage and the third voltage.