Electrical transmission or interconnection systems – Plural load circuit systems – Selectively connected or controlled load circuits
Patent
1987-04-21
1989-01-31
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural load circuit systems
Selectively connected or controlled load circuits
307 38, 290 40R, 340310R, 34082506, 365239, H02J 100
Patent
active
048018139
ABSTRACT:
An apparatus for generating a trigger signal in response to a selected pattern of events includes event synchronizers for generating synchronized event signals of states indicating the current state of each event on the falling edge of each pulse of a clock signal. A programmable encoder provides a set of event encoding signals of states set according to selected patterns of synchronized event signal states. A set of bus drivers 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 generates the trigger signal of state set according to the current state of the trigger initiating signal on the rising edge of each clock pulse.
Bedell Daniel J.
Hulse Robert S.
Ip Paul
Shoop Jr. William M.
Tektronix Inc.
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