| 摘要 |
A modulation controller includes an error amplifier which receives a reference voltage and an output voltage (VOUT) from a switching regulator being controlled by the controller at its inputs and provides a VCOMP signal at its output, and at least one comparator, wherein a first input of the comparator is coupled to an output of the error amplifier and a second input coupled to receive a ramp signal. A VCOMP shift cancellation circuit is interposed between the first or second input of the comparator, wherein the VCOMP shift cancellation circuit improves diode conduction mode performance (DCM) of the regulator by reducing a variation in average VCOMP.
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