Voltage reduction circuits

Details Voltage reduction circuits Voltage reduction circuits

H - Electricity

02

M

321/76

H02M 1/18 (1980.01)

Patent

CA 1119666

ABSTRACT A power supply provides a low-level DC voltage to DC load circuits by first rectifying the standard AC voltage and thereafter reducing the recti- fied AC voltage to the low-level DC voltage. The reduction of the rectified AC voltage to the low-level DC voltage is accomplished by a power transformer which is switched on or off by a pair of switching transistors. The switching transistors are operated in a "push-pull" mode by a pair of control transform- ers operating in combination with a control circuit. The control circuit produces various pulse conditions in the control transformers which turn their respective switching transistors on and off in a prescribed manner. An over- current sensing and control device prevents damage to components. A power on/fail circuit signals the load as to the status of the regulated load volt- age and guarantees power for orderly shutdown after an input power outage.

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