Appeal No. 1997-0600
Application 08/291,207
said power switching element performing an OFF
operation and an ON operation in response to an output of said
control circuit to turn off and on a main current flowing
across said pair of main electrodes;
wherein a path of an OFF driving current, which said
control circuit supplies to said control electrode to bring
said power switching element to said OFF operation, includes
said inductor; said off driving current flowing in the oppo-
site direction as said main current of said power switching
element in said inductor; and
wherein a path of an ON driving current, which said
control circuit supplies to said control electrode to bring
said power switching element to said ON operation, excludes
said inductor.
The Examiner relies on the following reference:
Kuroki 4,639,823 Jan. 27, 1987
Claims 2 through 7, 10 and 11 stand rejected under
35 U.S.C. § 103 as being unpatentable in view of the prior art
circuit shown in figure 6 of the Appellants' specification and
Kuroki.
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