Xenon power supply

A xenon power supply having constant power output comprising:

• a DC power supply having a first output;
• a controllable switch comprising:
• a power input which receives power from said first output;
• a control input for controlling the flow of electrical current through said controllable switch;
• and
• a second output;
• a capacitor connected to said second output such that a DC voltage is produced at said second output;
• a pulse width modulator having a pulse width modulated output in communication with said control input such that, when said pulse width modulator output is in a first binary state, electrical current will flow through said controllable switch and when said pulse width modulator output is in a second binary state, no electrical current will flow through said controllable switch;
• and
• a power measurement means for measuring the electrical power produced at said second output,
• wherein the pulse width of the waveform produced at said pulse width modulated output is adjusted to produce a substantially constant power at said second output.

A xenon power supply comprising:

• a first DC power supply having a first output;
• a plurality of current paths each current path of said plurality of current paths comprising:
• a first input for receiving power from said first output;
• an inductor;
• a controllable switch having a switch input;
• and
• a second output;
• a pulse width modulator having a pulse width modulated output in communication with said switch inputs of said plurality of current paths to control said controllable switch,
• wherein, said pulse width modulator operates at a frequency such that the electrical current flowing through each current path of said plurality of current paths is substantially limited by said inductor.