| 摘要 |
<p>A direct current power supply includes a rectifying circuit, a current regulating circuit and a smoothing circuit connected in series. Output connections are provided from the smoothing circuit. The rectifying circuit (36, Figs. 1A, 2, 3, 4; 36 min , Figs. 1B, 8) provides an unfiltered rectified output. The current regulating circuit (19, Figs. 1A, 1B, 8; 50, Fig. 2; 57, Fig. 3; 69, Fig. 4) is responsive to instant amplitude of the unfiltered rectified output from the rectifying circuit and passes current to the smoothing circuit (23, Figs. 1A, 1B, 2-4; 23 min , Fig. 6; 23 sec , Fig. 7; 73, Fig. 8) during periods when the unfiltered rectified output is between a first level, defined by voltage across the smoothing circuit, and a higher second level. The current regulating circuit blocks current to the smoothing circuit during periods when the unfiltered rectified output is greater than the second level.</p> |
