H - Electricity
02
M
321/27, 321/83
H02M 1/08 (2006.01) H02M 3/335 (2006.01) H02M 3/337 (2006.01) H02M 3/338 (2006.01) H02M 7/217 (2006.01)
Patent
CA 1085917
ABSTRACT A power supply provides a low-level DC voltage to one or more DC load circuits by first rectifying either of the two standard AC voltages and thereafter reducing the rectified 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 activated by a control transformer operating in combination with a control circuit. The control circuit timely produces various pulse conditions in the control transformer which turns the switching transistors on or off in a prescribed manner.
285628
Honeywell Information Systems Inc.
Smart & Biggar
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