Patent ID: 7904121

Claim:
A trigger signal generating device, comprising: a first power source terminal and a second power source terminal; a first current generator, receiving an input signal, to generate a first current with a first amplitude in accordance with the amplitude of the input signal; a second current generator, receiving the first current of the first current generator, to generate a second current with a second amplitude, the second current being flowed from the first power source terminal to the second power source terminal; a current mirror circuit to amplify the second current generated from the second current generator to obtain an amplified current; and a trigger signal generator to convert the amplified current into a trigger signal used for triggering a trigger device, the voltage amplitude of the trigger signal being corresponding to the current amplitude of the amplified current, wherein both of the first and second current generators are connected to either one of the first power source terminal and the second power source terminal, and wherein the first current generator includes a rectifier with an nMOS transistor which is configured such that a rectified voltage is applied to a drain and gate of the nMOS transistor and a standard voltage is applied to a gate of the nMOS transistor.