Patent ID: 6323798
Filing Date: 2001-11-27
Classification: H03M

Abstract:
A switched capacitor type digital-analog converter comprising:an input capacitor group which includes an input capacitor receiving an input signal and the shared input capacitors receiving the input signal which are used to control a capacitance of the input capacitor group;a first switch group applying a first voltage to the plurality of shared capacitors; a second switch group applying a second voltage to the input capacitor and the shared input capacitors;a reference voltage switch applying a reference voltage to the input capacitor and the shared input capacitors;a comparator comparing an output value of the input capacitor group and the reference voltage; an output capacitor including a capacitance which is smaller than a total capacitance of the input capacitor group, and arranged between the input capacitor group and an output of the comparator; and a short circuited switch shorting an input of the output capacitor to an output of thereof.