Current feed-through adaptive voltage position control for a voltage regulator
AssigneeRichtek Technology Corporation
InventorsHsin-Hsin Ho, Liang-Pin Tai, Hung-I Wang, Jian-Rong Huang, Jiun-Chiang Chen
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Abstract
In a voltage regulator including an error amplifier to generate a first signal related to an output voltage of the voltage regulator, a current sense circuit to generate a second signal related to an inductor current of the voltage regulator, and a PWM comparator to generate a PWM signal in response to the first and second signals to regulate the output voltage, a current feed-through adaptive voltage position control comprises supplying ramp signal and offset signal to modify the PWM signal to thereby elliminate the offset of the output voltage.
Claims12
A voltage regulator comprising:
- an error amplifier for generating a first signal related to an output voltage of the voltage regulator;
- a current sense circuit for generating a second signal related to an inductor current of the voltage regulator;
- a PWM comparator for generating a PWM signal in response to the first and second signals to regulate the output voltage;
- a ramp injection circuit for supplying a ramp signal;
- and
- an offset injection circuit for supplying an offset signal;
- wherein the ramp signal and offset signal are used to modify the PWM signal.
A current feed-through adaptive voltage position control for a voltage regulator, comprising the steps of:
- generating a PWM signal in response to a first signal related to an output voltage of the voltage regulator and a second signal related to an inductor current of the voltage regulator for regulating the output voltage;
- wherein the PWM signal is modified by a ramp signal and an offset signal.
Dependencies are inferred from the claim text.