Patent ID: 8552895
Filing Date: 2013-10-08
Classification: H03M

Abstract:
1. A sigma-delta modulator, comprising: an integration circuit configured to include a first terminal and a second terminal, and to integrate a voltage supplied via the first terminal; a first DAC unit configured to, when a first reference voltage is supplied to one end of a first resistor, alternately supply a first voltage obtained at a remaining end of the first resistor to the first terminal and the second terminal; and a second DAC unit configured to, when a second reference voltage is supplied to one end of a second resistor, alternately supply a second voltage obtained at a remaining end of the second resistor to the second terminal or the first terminal; wherein the second DAC unit supplies the second voltage to the second terminal when the first DAC unit supplies the first voltage to the first terminal, and the second DAC unit supplies the second voltage to the first terminal when the first DAC unit supplies the first voltage to the second terminal.