H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/29
H02M 3/00 (2006.01) H02M 3/335 (2006.01)
Patent
CA 1112721
ABSTRACT OF THE DISCLOSURE A switching regulator includes a DC voltage source having a pair of DC output terminals, a switching transformer having first and second primary windings connected in series, a magnetic core and a secondary winding, a first switching tran- sistor connected in series between the pair of DC output terminals through the first primary winding, a second switching transistor connected in series between the pair of DC output terminals through the first and second primary windings, a rectifier circuit connected across the secondary winding. A pulse width modulator is provided to produce a PWM (pulse width modulated) control signal the duty of which is proportional to the voltage or the rectifier circuit and the PWM control signal is selectively supplied to one of the first and second switching transistors in accordance with the low or high circumstance of the load. Further, a reference pulse signal having a standard pulse width is provided, which is compared with the PWM control signal so as to selectively supply the PWM control signal to one of the first and second switching transistors. -1-
316606
Gowling Lafleur Henderson Llp
Sony Corporation
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