Patent ID: 7961767

Claim:
A high current radiation system, the system comprising: a high current radiation source to generate radiation; an analog circuit to generate, based, at least in part, on an input signal representative of the present current level delivered to the high current radiation source and a user-controlled input representative of a desired current level, an output signal to control the current level to be delivered to the high current radiation source; and a current driver to control the current delivered to the high current radiation source based, at least in part, on the output signal of the analog circuit; wherein the analog circuit comprises an analog comparator implemented using at least one operational amplifier, the analog comparator configured to; generate a logical high signal when a voltage level of the user-controlled input exceeds a voltage level of the input signal representative of the present current level delivered to the high current radiation source; and generate a logical low signal when the voltage level of the user-controlled input is below the voltage level of the input signal representative of the present current level delivered to the high current radiation source.