Patent ID: 7116537

Claim:
A surge current prevention circuit comprising: a power switch including an input terminal connected to a power supply, an output terminal connected to a load, and a control terminal for controlling current; a first control device having an output terminal connected to the input terminal of the power switch; a second control device having an output terminal connected to the output terminal of the power switch; a first current supply having an input terminal connected to an input terminal of the first control device, a third control device having a control terminal connected to the input terminal of the first current supply and the input terminal of the first control device, wherein the second control device has an input terminal connected to an output terminal of the third control device, and the output terminal of the second control device is connected to the load; a second current supply connected to an input terminal of the third control device, wherein the control terminal of the power switch and control terminals of the first and second control devices are connected to the second current supply; and an input control device through which the control terminals of the power switch and the first and second control devices are grounded.