| 摘要 |
A power source for an electronic system re-uses a cyclically recurring event in the system as an on/off control for establishing a well- regulated series of rectified DC pulses which recur at a predictable and high frequency. The cycle of an SCR (20) 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 determined by the flyback, the resulting conduction period is the net controlling regulation characteristic of the system. <IMAGE> |
