Appeal No. 1997-3996
Application 08/519,952
accordance with a result of the comparison;
a power source for supplying a power voltage;
a switching circuit for switching the power voltage on and off in accordance with the pulse
signal outputted from said pulse width control circuit to provide a power output signal;
a smoothing circuit for smoothing the power output signal of said switching circuit, and for
applying the smoothed output signal as a constant power source voltage to an external circuit, and as
the reference voltage to said pulse width control circuit; and
a reference clock signal source in the external circuit providing a reference clock signal at a
fixed frequency to the oscillator circuit,
wherein an oscillating operation of said oscillator circuit is synchronized with the reference clock
signal from the circuit.
The following references, along with appellant’s admitted prior art of Figure 5 and pages 1 to 3
of the specification, are relied on by the examiner:
Komori 4,590,525 May 20, 1986
Kikuchi 4,630,000 Dec. 16, 1986
Driscoll et al. (Driscoll) 4,812,959 Mar. 14, 1989
Claims 1 to 18 stand rejected under 35 U.S.C. § 103. As evidence of obviousness, the
examiner relies upon appellant’s admitted prior art in view of Komori, Kikuchi, and Driscoll.
Rather than repeat the positions of appellant and the examiner, reference is made to the Brief
and the Answer for the respective details thereof.
OPINION
It is our view, after consideration of the record before us, that the evidence relied upon and the
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