Appeal No. 1997-3444
Application 08/268,728
The means for biasing operates in a specifical manner: the
voltage is applied to the base and is then removed, leaving
the transistor self-latched (see Appellants' figures 8 and 9).
The biasing circuits of the Handbook do not remove the bias,
as claimed. The Examiner has not shown that the transistor is
latched at the boundary between the second and third operating
regions, as defined in claim 21; mere latching in the Handbook
is not sufficient to prove this condition. Further, the
limitation requires the output to be at the base of the
transistor, which is not the case in the Handbook.
Third, the Examiner has not shown how the Handbook
anticipates the limitation "so that when the voltage applied
to the base of said bipolar transistor is such that V is less
BE
than said threshold and said applied voltage is then removed
by said means for biasing, the bipolar transistor operates in
said first operating region and outputs from the base an
output voltage at a second level different than said first
level." Again, the biasing circuits in the Handbook do not
remove the bias and the output is not at the base of the
transistor. Also, the Examiner has not shown that the
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