Appeal No. 2005-0261
Application No. 09/682,473
Representative claim 8 is reproduced as follows:
8. A method of driving a clock tree on an
integrated circuit (IC), the method comprising the
steps of:
providing an IC having a clock tree;
distributing a clock signal in the form of a
differential sinusoidal signal pair in a portion of the
clock tree, the differential sinusoidal signal pair
comprising a first sinusoidal signal and a second
sinusoidal signal; and
generating a local clock signal from the
differential pair by employing both the first
sinusoidal signal and the second sinusoidal signal to
form the local clock signal.
The examiner relies on the following references:
Matsumoto et al. (Matsumoto) 5,448,188 Sep. 5, 1995
Wissell et al. (Wissell) 6,184,736 Feb. 6, 2001
Claims 8 and 13 stand rejected under 35 U.S.C. § 103(a). As
evidence of obviousness the examiner offers Wissell in view of
Matsumoto.
Rather than repeat the arguments of appellants or the
examiner, we make reference to the briefs and the answer for the
respective details thereof.
OPINION
We have carefully considered the subject matter on appeal,
the rejection advanced by the examiner and the evidence of
obviousness relied upon by the examiner as support for the
rejection. We have, likewise, reviewed and taken into
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