Patent ID: 8184669

Claim:
A high current radiation system, the system comprising: a high current radiation source to generate radiation having an output spectrum based, at least in part, on level of current delivered to the radiation source; an analog circuit to receive an input signal representative of present current level delivered to the high current radiation source and an other input representative of a desired current level, the analog circuit further configured to generate, based, at least in part, on the input signal representative of the present current level delivered to the high current radiation source and the other input representative of the desired current level, an output signal to control the level of the current 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; wherein the analog comparator is configured to: generate a first logical signal when a voltage level of the other 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 second logical signal when the voltage level of the other input is below the voltage level of the input signal representative of the present current level delivered to the high current radiation source.