Dithering Laser Drive Apparatus
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United States of America Patent
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Issued Date -
Apr 7, 2011
app pub date -
Oct 6, 2009
filing date -
Oct 6, 2009
priority date (Note) -
Abandoned
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Abstract
A laser drive apparatus includes a plurality of transistors driven by different comparators. The different comparators receive an analog drive value and different ramp signals and produce pulse width modulated output signals. A calibration feedback circuit may be used to calibrate a power supply that provides a power supply voltage. A dither circuit may be used to reduce the number of bits received by the laser drive apparatus.
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