Appeal No. 98-0130 Page 6
Application No. 08/631,793
pulse position modulation circuitry with circuitry for passing
the control information by modulating a carrier. After this
were done, we would then have to make the first and second
circuit assemblies, each of which includes a communicator for
sending or receiving the control information, mechanically
separable as assemblies from one another for passing control
information by modulating a carrier.
Turning first to the issue of modifying Snow to replace
the pulse position modulation circuitry with circuitry for
passing the control information by modulating a carrier, we
note at the outset that whether or not the pulse position
modulation of Snow or the pulse width modulation of Gillett
include modulation of a carrier is not before us on review in
this appeal as both appellant and the examiner are in
agreement that neither the pulse position modulation of Snow
nor the pulse width modulation of Gillett includes modulation
of a carrier.2
2 Appellants state (Answer, page 12) “Furthermore, while Snow shows
passing control information from the primary side to the secondary side
through windings, Fig. 1, col. 3, ll.2-12, it is done by pulse modulation, not
by modulating a carrier. See Figs. 4A, 4B (showing pulse modulation without a
carrier). Gillett shows . . . control information is passed through pulse
width modulation, not by modulating a carrier. Fig. 2 (element 42); col. 3,
ll. 25-34.” Appellants additionally state (Reply Brief, page 2) that
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