Efficient fast pulsed laser or light-emitting diode driver

Details Efficient fast pulsed laser or light-emitting diode driver Efficient fast pulsed laser or light-emitting diode driver

2007-08-28

2007-08-28

Owens, Douglas W. (Department: 2821)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C315S169100, C323S282000

Reexamination Certificate

active

11054349

ABSTRACT:
A capacitor is connected to the output of a multiphase power converter, and a current-driven device (e.g., LED or laser diode) is also connected to the power converter output. A solid state switch (FET or IGBT) is connected in series with the current-driven device. Means are provided for sensing current through the current-driven device. An error amplifier compares sensed current through the current-driven device with a current level demand signal and controls the output of the power converter. Means are provided for turning the switch on and off and may be (i) a fast comparator receiving a voltage reference signal at one input and the current level demand signal at another input, and outputting the switch on/off signal to the switch or (ii) an externally-generated logic signal provided directly to the switch.

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Model 779A,High Power CW or Pulsed Laser Diode Driver, Analog Modules, Inc., Longwood Florida (www.analogmodules.com).

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