Appeal No. 95-1865
Application 07/970,816
error… ” Independent claim 15 requires, inter alia, receive clocks “which are phase offset from
one another; detecting the phase error between the receive clock applied to said receiver of said
transceiver of said second channel medium and the data signal received thereby; and adjusting the
phase of a transmit clock applied to said first transceiver of said second channel medium in
response to said detected phase error to minimize said phase error.”
While each of the independent claims requires at least phase delay or offset between
clocks in different channels and the detection of phase error for adjusting phase to minimize phase
error, the examiner admits [answer-page 4], correctly, that the prior art of Figures 1-4 do not
teach the claimed phase delay means, the detector means and the means for adjusting. However,
the examiner then provides for this deficiency of the prior art by asserting [answer-page 4] that “it
has been known in the field of time division multiplexing that the phases of the clocks of the two
signals being multiplexed must be phased-offset [sic] by a predetermined phase… so that both
signals from two different channels could timeshare a single analog-to-digital (A/D) converter.”
The examiner then concludes [answer-page 4] that it would have been obvious “to apply a ‘phase
delay means’ between the transceivers (3 and 4) of the Prior Art so that the receive clocks
between both of the transceivers is always obtained with fixed phase offset; thus a single A/D
converter could be timeshared for both channels.”
4
Page: Previous 1 2 3 4 5 6 7 8 Next
Last modified: November 3, 2007