Appeal No. 1998-3036
Application No. 08/404,920
appellant’s invention (i.e., the elimination of undesirable reflections in a signal line by
controlling the impedances within an integrated circuit (column 1, lines 60 to 66)), Dunlop
teaches that “[e]ffective control of impedance values in integrated circuit applications is
achieved with an integrated circuit transistor whose size is digitally controlled” (column 2,
lines 54 and 55). Dunlop utilizes only digital signals to control the impedance values in an
integrated circuit while the claimed invention utilizes both digital and analog signals to
control impedance values. For this reason, the obviousness rejection is reversed.
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