| 摘要 |
A power supply having a protection circuit for interrupting the current flow from the power supply upon the occurrence of an excessive current drain from the output of the power supply and for automatically restoring the power supply output upon a termination of the excessive current drain and a subsequent recycling of the power supply input. In a specific embodiment, the protection circuit interrupts the output of a direct current (D.C.) to direct current (D.C.) inverter to protect the oscillator and other circuit components from a current overload produced by an excessive current drain which produces a drop in the output voltage. A transistor in series with the output current is maintained in a conducting state by a control transistor supplying base current thereto. The control transistor is turned off by a drop in the output voltage while a start-up capacitor provides a current path to the base of the control transistor to restart the power supply output upon by a recycling of the input to the power supply.
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