| 摘要 |
A digital-to-analog (D/A) converter used for a digital audio equipment, comprises a binary D/A converting circuit and a calculation processing circuit for receiving an analog signal derived from the binary D/A converting circuit. This D/A converter is capable of considerably reducing a load given to an LPF (low-pass filter) or, of omitting such an LPF. The binary D/A converting circuit outputs an analog signal value corresponding to each sampling point of a digital signal as a first analog output value, and also outputs an analog output signal value delayed by only 1 sampling period as a second analog output value. A difference calculating unit of the calculation processing circuit calculates a difference value between the first analog output value as a first analog input value, and the second analog output value as a second analog input value. The resultant difference value is integrated by an integrating unit and the integrated difference value is outputted as an analog output value from the calculation processing circuit. A portion of the output value of the integrating unit is returned to the input side of the difference calculating unit to be added to the second analog input signal value.
|
