Appeal No. 96-2551
Application 08/037,767
magnitude of the secondary pulse of the first polarity and the
first magnitude." This "wherein" clause describes the effect of
activating the "first controlled switch [Q3] in response to the
development of a secondary pulse of the first [i.e., negative]
polarity and the first magnitude." The examiner contends the
passage in question is "not understood" because
[i]t is not seen possible that either the "first
capacitor" or the "second capacitor" can discharge.
When either a positive or a negative pulse is provided
from the secondary winding (turning on either Q3 or Q4,
respectively), a positive voltage is provided between
nodes 30 and 32 due to rectifier [diodes] D1-D4 and
diodes D5 and D6. With a positive voltage being applied
across nodes 30 and 32, and thus across the "first
capacitor" and the "second capacitor," the "first
capacitor" cannot discharge. [Answer at 7; emphasis in
original.]
This analysis ignores the fact that the diodes do not conduct
immediately upon receipt of a negative or a positive secondary
pulse and turn-on of control transistor Q3 or Q4. The diodes do
not begin to conduct until after some charge has been transferred
via Q3 or Q4 between the capacitors and control electrode 24 of
transistor Q1. See the specification at page 3, line 20 to page
4, line 7, and page 12, lines 7-8. The examiner has not
explained, and it is not apparent to us, why appellant's circuit
-8-
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