Patent ID: 7817074

Claim:
A D/A converter comprising: a delta-sigma modulation circuit including a quantizer for receiving a digital signal and quantizing the digital signal according to a quantization reference value; a local D/A conversion circuit for converting an output of the delta-sigma modulation circuit to an analog signal and outputting the analog signal; and a control circuit for correcting the quantization reference value of the quantizer, wherein the quantization reference value is set for every one of plural discrete output values that could be output from the quantizer, wherein the control circuit corrects the quantization reference value by multiplying the quantization reference value of the quantizer by a factor α, wherein the factor α is determined based on a distortion occurring in circuit following and connected to the delta-sigma modulation circuit, and wherein an output of the circuit following and connected to the delta-sigma modulation circuit is changed to α times an ideal output value thereof due to the distortion occurring in the circuit following and connected to the delta-sigma modulation circuit.