Disable/enable control for laser driver eye safety
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United States of America Patent
Stats
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May 8, 2007
Grant Date -
Jul 22, 2004
app pub date -
Jan 17, 2003
filing date -
Jan 17, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A circuit for disabling an energy-generating component. The circuit comprises an input operable to receive a disable signal and a disable circuit operable to disable the component in response to the disable signal for a predetermined duration of time sufficient to maintain an average power generated by the component at or below a predetermined level. The disable circuit further comprises a signal-detection circuit operable to detect the presence of disable signals having a respective rising edge and falling edge, a mask-signal generating circuit coupled to the signal detection circuit and operable to generate a mask signal when one of the edges of a first disable signal is detected; and a latching circuit coupled to the mask-signal generating circuit and operable to generate a mask disable signal if the mask signal is being generated and the other edge of a subsequent disable signal is detected.
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