Appeal No. 97-0951
Application 08/148,452
fixed ratio between a reference voltage at Zener diode 70
and the output voltage V . Current limiting circuitry 24
o
senses the current that the power supply provides to the
load and disables the MOSFET 80 when the current exceed a
predetermined value. Appellants' sketches of the circuits
of the invention, Wong, and Banura (Br13) fairly show the
differences between the circuits. Banura discloses a
current limiting transistor 80, but since Banura is not
directed to controlling the current through an inverter or
to controlling the current for charging and discharging the
capacitance on a node in a slew rate control environment, we
must agree with Appellants' arguments (Br14) that there is
no indication why or how these two circuits could be
combined.
The Examiner has not indicated how the references could
possibly be combined. The Examiner concludes that "[i]t
would have been obvious to one having ordinary skill in the
art at the time the invention was made to provide the
invention of Wong with a current limiting transistor and a
current regulator circuit of Banura, in order to provide an
efficiency, that includes a low loss current limiter with a
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