Appeal No. 99-0872
Application 08/885,399
R single crystal substrates, where R is an
integer greater than zero; each single
crystal substrate having a surface at which
circuitry can be formed; and
at the surface of each of the R single crystal
substrates, digital-to-analog circuitry, the
digital-to-analog circuitry on each substrate’s
surface having digital input leads and at least S
analog output leads, where S is an integer not less
than 32; the digital-to analog circuitry providing,
on each analog output lead, an analog drive signal
with an amplitude that varies with a value indicated
by a digital drive signal received from the digital
input leads; the R single crystal substrates
together having T analog output leads, where T is an
integer not less than P; each of the P analog input
leads of the multiplexer circuitry being paired with
and connected to one of the T analog output leads so
that the R single crystal substrates together
provide the input analog drive signals.
Opinion
The rejection of claims 1-12 is reversed.
A reversal of any rejection on appeal should not be
construed as an affirmative indication that the appellants’
claims are patentable over prior art. We address only the
sufficiency of the findings and rationale as set forth by the
examiner and on which the examiner’s rejection is based.
According to the appellants, two problems tug at opposite
ends of trying to produce an efficient driver for active
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