Appeal No. 1997-1505 Page 15
Application No. 08/580,778
We find that Grandfield discloses (col. 1 lines 56-66) that
A phase lock loop is provided which is responsive
to the reference frequency signal and to an operating
frequency signal to provide a current reference
signal
at the output of the loop. The current reference signal
is provided to a current to frequency converter which
generates the operating frequency signal. A current
mirror, also coupled to the phase lock loop output
provides an output current essentially equal to the
current reference signal which is suitable for
providing the injector current for I L devices.2
It is clear from the above that Grandfield is directed to a
current reference device and does not disclose or suggest a
reference voltage generator. In our view, Grandfield
therefore would not have suggested to one of ordinary skill in
the art to have provided the current averaging data separator
of Wahler with a reference voltage generator including
adjustment of the loop frequency until a desired reference
voltage is generated.
The examiner asserts (answer, page 5) that Wahler
discloses “means for locking (means, not shown, providing
÷N).” (answer, page 9) and that the “fixed signal ÷N provided
to divider 16" of Wahler “can reasonably be considered
‘locking’ such as recited in the present claims.” We find
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