Appeal 2006-3382
Application 10/461,709
feeding back from the output, and “the error signal of amplifier 108 is not
selectably set by a user because only the gain of the amplifier may be set
by the user.” (Reply Br. 8). The Examiner contends that the “user” does
set the selectable current command signal, since the user specifies the
relative size of the voltage splitting resistors on the output (Goluszek,
Fig. 5), which drives the firing of current error amplifiers 104 and 112,
and the controllers 102, 110. In giving claims their broadest reasonable
interpretation, and in avoiding reading limitations from the Specification
that do not appear in the claims, we find that the claims do read on the
Goluszek reference when viewed as expressed by the Examiner. The
claims do not require that the command signal can be easily modified
during use, as by a potentiometer, but only that they can be user selected.
Concerning the rejection of claims 8, 15-16, 19, 22, 31, 36, and 39 under
35 U.S.C. 103(a) for being obvious over Goluszek in view of Wang.
1. Examiner contends that Goluszek does not show the details of the
Pulse Width Modulator as being comprised of a set-reset RS flip flop.
Wang does show that the PWM can be so comprised, in the context of
a switching regulator control circuit. (Answer 8). Appellant does not
argue against that specific contention, but relies instead on the general
issues raised above concerning Goluszek’s design and the pulses
entering the second stage. (Br. 13). We find that the Examiner’s
combination of references does render the noted claims obvious over
the art.
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