| 摘要 |
In accordance with the teachings of the present invention, an apparatus and method are provided for DC output regulation using dual pulse modulation. A DC output is regulated by reducing the rms value of the output voltage by twice modulating the output. The DC voltage is first mixed with a lower frequency signal and then with a higher frequency signal in order to reduce the voltage seen by a load powered by the DC output. The rms value of the voltage can be adjusted by increasing or decreasing the number of high frequency pulses that are mixed with the on-time of the lower frequency pulses. This can be used to provide a soft start to a load during its warm-up period.
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