Appeal No. 96-2551
Application 08/037,767
§ 112 rejection of claims 5-9, which were rejected "for the
reasons discussed in claims 1 and 3," of claim 11, which was
rejected "for similar reasons as discussed above with respect to
claim 3," and of claims 12-14, which were rejected "for the
reasons discussed above with claim 11" (Answer at 5).
B. The § 102(b) rejection of claims 10 and 15.
Claims 10 and 15 are directed to precharging of the
first capacitor, which, as noted above in the discussion of claim
3, is performed by transistor Q5. Those claims read as follows:
10. In a drive circuit for a power switching
device wherein the drive circuit includes a transformer
having a primary winding and a secondary winding across
which a secondary pulse is developed when an input pulse
is provided to the primary winding at a particular time,
means coupled to the secondary winding for rectifying
the secondary pulse, a capacitor connected across the
rectifying means and a controlled switch having a
control electrode coupled to the secondary winding of
the transformer and first and second main current path
electrodes, the first main current path electrode
coupled to the capacitor and the second main current
electrode coupled to a control electrode of the power
switching device, the improvement comprising:
means coupled to the first capacitor and operable
before the particular time for precharging the
capacitor.
15. In a drive circuit for a power transistor
having main current path electrodes one of which is
coupled to a power source wherein the drive circuit
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