| 摘要 |
<p>The damaging effects caused by an abrupt rise of the supply voltage on particularly sensitive circuits when power is returned to the distribution network after a blackout, are prevented by providing the power supply with means for controlling a gradual rise of the output voltage thereof in accordance with a pre-established ramp when the power supply is switched-on. These mean utilize a microprocessor driving at least one low-to-high type level shifter having a load formed by a network of resistors with scaled values, for generating an output analog voltage signal corresponding to a digital value presented by the microprocessor at the logic gate driving the level shifter circuit. The analog voltage signal, properly buffered, is applied to a control terminal of the power supply.</p> |
