Patent ID: 7492612

Claim:
A high-voltage generator comprising: a switch device having a control terminal, a first current-conducting terminal and a second current-conducting terminal; a transformer having a primary coil, a secondary coil, and an auxiliary coil, wherein one end of the auxiliary coil is connected to the control terminal, and the other end of the auxiliary coil and the first current-conducting terminal of the switch device are connected to an input DC voltage, and wherein one end of the primary coil is connected to the second current-conducting terminal of the switch device and the other end of the primary coil is connected to ground; a voltage detection signal generator connected to the primary coil for receiving an output of the primary coil and generating a voltage detection signal indicative of an output voltage of the high-voltage generator; and a comparing unit connected between the voltage detection signal generator and the control terminal of the switch device for generating a voltage control signal according to the voltage detection signal and a switch control signal, wherein the voltage control signal is sent to the control terminal of the switch device to regulate the output voltage of the high-voltage generator.