Power source circuit

Details Power source circuit Power source circuit

H - Electricity

02

M

321/100

H02M 3/28 (2006.01) H02M 3/315 (2006.01) H02M 7/155 (2006.01) H04N 3/18 (2006.01)

Patent

CA 1191545

ABSTRACT OF THE DISCLOSURE A power source for an electronic system re-uses a cyclically re- curring event in the system as an on/off control for establishing a well regu- lated series of rectified DC pulses which recur at a predictable and high fre- quency. The cycle of the SCR is the regulating determinant of the system. In the preferred embodiment, the recurring event is a scan and retrace cycle of a CRT display. An SCR is switched off by the flyback transformer of the CRT horizontal deflection circuit. Therefore, since this turn-off time is deter mined by the flyback, the resulting conduction period is the net controlling regulation characteristic of the system.

411903

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