Appeal No. 95-3876
Application 08/222,009
transistors Q3-Q6 in the Figure 1 and Figure 7 embodiments can
be reconciled.
Claim 14, the sole independent claim on appeal,
reads as follows:
14. A flash device comprising:
a power source;
a main capacitor adapted to be charged by the
power source;
a flash firing unit operable to consume charge
stored in the main capacitor to emit flash light;
an insulated gate bipolar transistor disposed in
a discharge loop for the main capacitor through the
flash firing unit;
means for receiving a flash firing command
signal;
first circuit means for generating a flash
exciting signal based on the flash firing command
signal;
a second circuit means for generating an
enabling voltage for the insulated gate bipolar
transistor;
trigger means for exciting the flash firing unit
in response to the flash exciting signal; and
control means for applying the enabling voltage
to a gate of the insulated gate bipolar transistor
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Last modified: November 3, 2007