Disable/enable control for laser driver eye safety

Details Disable/enable control for laser driver eye safety Disable/enable control for laser driver eye safety

2008-01-01

2008-01-01

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular component circuitry

Having fault protection circuitry

C372S038100

Reexamination Certificate

active

07315558

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.

REFERENCES:
patent: 5272716 (1993-12-01), Soltz et al.
patent: 5999549 (1999-12-01), Freitag et al.
patent: 2003/0002109 (2003-01-01), Hochberg et al.
patent: 0441709 (1991-08-01), None
patent: 0486172 (1992-05-01), None
patent: EP1202454 (2002-05-01), None
patent: GB2365236 (2000-02-01), None

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