Compensation sample and hold for voltage regulator amplifier

Details Compensation sample and hold for voltage regulator amplifier Compensation sample and hold for voltage regulator amplifier

2005-10-25

2005-10-25

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

Input level responsive

Using a linearly acting final control device

C323S273000, C323S274000

Reexamination Certificate

active

06958596

ABSTRACT:
The problem of charge leakage in the AC compensation filter for the error amplifier of a pulse width modulation (PWM)-based DC—DC converter is effectively obviated by controllably sampling and storing the voltage across the AC compensation filter, in response to a transition of the operation of a DC power supply from run or active mode to quiescent or sleep mode. The sampled voltage is retained as a compensation voltage throughout the quiescent mode, so that it will be immediately available to the PWM circuitry at the termination of the quiescent interval. This serves to ensure a relatively smooth (low noise) power supply switch-over during a subsequent transition from quiescent to active mode.

REFERENCES:
patent: 5650715 (1997-07-01), Massie
patent: 6545513 (2003-04-01), Tsuchida et al.

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