Appeal No. 1996-3276
Application 07/978,518
pulse-string signals, wherein each one of said plural groups
of said pulse-string signals represents a message, and wherein
there is a predetermined normal maximum number N of pulses
1MAX
in each said group of said pulse-string signals and a
predetermined normal minimum idle time T between successive
MIN
ones of said groups of said pulse-string signals, said
monitoring circuit comprising:
counting means receiving said communication signal, for
counting a number of pulses in each said group of said
pulse-string signals of said communication signal, and when
said counted number of pulses exceeds a predetermined maximum
number of pulses which is equal to at least said maximum
number N for
1MAX’
outputting an abnormal condition signal which represents an
abnormal condition of said communication device; and
idle time measuring means, receiving a reference clock
signal and being responsive to said communication signal, for
measuring an amount of idle time between successive ones of
said groups of said pulse-string signals of said communication
signal by counting a number of pulses of said reference clock
signal, and for resetting said counting means when said
measured idle time exceeds a predetermined minimum amount of
idle time which is at most said minimum idle time T .
MIN
The references relied on by the Examiner are:
Matsuura et al. (Matsuura) 4,555,702 Nov. 26, 1985
Ihara et al. (Ihara) 4,623,884 Nov. 18, 1986
Class B Data Communication Network Interface-SAE J1850, Aug.,
1991 (APA)
Claims 1 and 11 to 25 stand rejected under 35 U.S.C. §
103 over Ihara, Matsuura and APA.
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