Power supply monitor
First Claim
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1. Apparatus comprising (i) duty cycle modulated power regulating means for, in accordance with a duty cycle, alternately allowing, for a variable time Tx, and inhibiting, for a variable time Ty, contribution of an unregulated DC source to the regulating means output, said Tx varying in response to variation in said unregulated DC source so that a substantially constant voltage-time area per (Tx +Ty) interval is maintained at the regulating means output, and (ii) detection means for monitoring said duty cycle and providing a signal indicative of the value of said duty cycle.
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Abstract
In a duty cycle modulated power regulating apparatus, loss of regulation is anticipated by monitoring the duty cycle of the regulating means.
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Citations
16 Claims
- 1. Apparatus comprising (i) duty cycle modulated power regulating means for, in accordance with a duty cycle, alternately allowing, for a variable time Tx, and inhibiting, for a variable time Ty, contribution of an unregulated DC source to the regulating means output, said Tx varying in response to variation in said unregulated DC source so that a substantially constant voltage-time area per (Tx +Ty) interval is maintained at the regulating means output, and (ii) detection means for monitoring said duty cycle and providing a signal indicative of the value of said duty cycle.
Specification