Pulse order recognition circuit
AssigneeKent County Council
InventorMalcolm S. Bourner
Life of this patent
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Abstract
A circuit which has two inputs at which respective ones of two time-displaced pulses may be received. The circuit also has an output at which a signal is produced if the pulses arrive in one order but not if they arrive in the opposite order. The circuit may have a second output at which a signal is produced if they arrive in said opposite order but not if they arrive in said one order. If spaced apart movement sensors are used to provide the two input signals, the circuit having two outputs indicates in which of two directions an object such as a vehicle passes the sensors. If only a single output is employed the circuit indicates each object passing in one direction but ignores objects passing in the opposite direction. Further applications of the circuit are disclosed.
Claims11
A pulse order recognition circuit having a quiescent condition and comprising first and second inputs for receiving when the circuit is in said quiescent condition respective ones of two electrical pulses displaced relative to each other in time, at least one output, means for providing at said output an output signal in response to the earlier of said pulses being received at said first input and the later of said pulses being received at said second input, means for preventing said output signal from being provided at said output in response to the earlier of said pulses being received at said second input and the later of said pulses being received at said first input, said providing means and said preventing means being adapted to so operate irrespective of whether the two pulses overlap in time, or not, and means responsive to said later pulse for resetting the circuit to said quiescent condition ready to receive a further two said pulses.
Dependencies are inferred from the claim text.