G - Physics – 05 – B
Patent
G - Physics
05
B
328/177, 328/86
G05B 19/04 (2006.01) G05B 19/045 (2006.01)
Patent
CA 1274002
Abstract An apparatus for generating a trigger signal in response to a selected pattern of events in- cludes event synchronizers for generating synchro- nized event signals of states indicating the cur- rent state of each event on the falling edge of each pulse of lock signal. A programmable enco- der provides a set of event encoding signals of states set according to selected patterns of syn- chronized event signal states. A set of bus dri- vers actively drives the potential of each conductor of a bus high on the falling edge of each clock signal pulse and actively drives the potential of selected conductors of the bus low on the rising edge of each clock signal pulse, the conductors being selected according to the pattern of event indicating signal states generated by the encoder. A set of signal detectors produces output signals of states indicating whether the potential of each conductor has been driven low since the last rising edge of each clock signal pulse, and a programmable decoder supplies a trigger initiating signal on detection of selected patterns of signal detector output signal states. A trigger synchronizer gene- rates the trigger signal of state set according to the current state of the trigger initiating signal on the rising edge of each clock pulse.
563949
Kersenbrock Michael D.
Kirby Eades Gale Baker
Tektronix Inc.
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