DAC DEVICE AND AUDIO SYSTEM

摘要

In a DAC device, a distortion correction function g1(x) of a harmonic obtained from a result of a frequency analysis on an analog output signal of a DAC circuit is obtained. A correction value is determined based on the correction function g1(x) in accordance with an input digital signal, and is previously stored in a memory. A nonlinear correction circuit reads a corresponding correction value from the memory in accordance with the value of a digital signal output from a digital filter, and transmits the correction value to a subtractor. The subtractor subtracts the correction value from the digital signal output from the digital filter.

主权项

1. A DAC device comprising:
a subtraction section configured to subtract a correction value from an input digital signal; a DAC circuit configured to receive the digital signal from which the correction value has been subtracted by the subtraction section, and to convert the digital signal to an analog signal; and a correction value output section, wherein when the input digital signal is output to the DAC circuit without passing through the subtraction section, the correction value output section outputs a distortion component included in an analog signal output from the DAC circuit in accordance with the input digital signal, as a correction value to the subtraction section by using a distortion correction function in accordance with the input digital signal obtained based on information on an analog element in the DAC circuit.