Appeal No. 1997-0058
Application No. 08/300,399
White with the active transconductance amplifier slew rate
limiting circuit of Sasaki et al. to obtain a more precise
output waveshape as clearly suggested in column 1 of Sasaki et
al." Claims 8, 11, and 12 all require a gain stage, or
amplifier, and as discussed above, White does not disclose an
amplifier. Sasaki states (column 1, lines 43-45) that "[w]ith
slew-rate control, ECL drivers offer good timing margins, good
signal integrity, and introduce little noise." However, as
explained by appellants (Brief, page 17), "there is absolutely
no suggestion that the digital driver circuit of Sasaki et al.
be interchanged with components of the power supply circuit of
White." In other words, the examiner has failed to provide a
proper motivation to combine the references. Therefore,
Sasaki does not cure the deficiencies of White, and we will
not sustain the rejection of claims 8, 11, and 12.
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