Power source circuit

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor

Patent

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Details

361 23, 361 58, 361115, H02H 300

Patent

active

060143002

ABSTRACT:
A power source circuit includes switch for connecting and disconnecting a power source to and from a circuit proper; stabilizing means for suppressing a variation of an input voltage to stabilize the input voltage; voltage increasing means for increasing the input voltage in amplitude; switching means for controlling a voltage increasing operation; rectifying means for rectifying a switching waveform; smoothing means for smoothing a rectified waveform; and control means for controlling an output voltage to be constant in amplitude. In the power source circuit, the start of operating the power source circuit is delayed behind the start of supplying electric power. Therefore, it is prevent a power source circuit from failing to operate under the condition that a power source of a large internal resistance is coupled thereto, and the rush current, for example, causes the power source voltage drop.

REFERENCES:
"Data-book of National Semiconductor (1996)", p. 12, Jan.

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