| 摘要 |
Techniques for applying a periodic signal to an interpolated digital signal at the input of a delta-sigma modulator to reduce noise tones a DC noise level in the output of a delta-sigma DAC. The duty cycle of the periodic signal can be adjusted to substantially cancel the DC noise level. In one embodiment, the DC noise level is first determined by, e.g., a calibration process. Then, the duty cycle of the periodic signal is adjusted according to the determined DC noise level. |
