Multiplexer and time duration measuring circuit

A device for multiplexing data to a master storage from a plurality of pulse sources which randomly develop pulses, comprising:

• a first multiplexer unit including a plurality of input circuits equal in number to the sources, each of said input circuits being coupled to a separate one of said sources and having first and second stable states indicated by different outputs therefrom and having a disabled state wherein said input circuits are prevented from switching from said one stable state to the other stable state, with all of said input circuits at said first stable state, one of said input circuits being responsive to the leading edge of a pulse of particular time duration from the source coupled thereto to assume said second stable state, disabling means coupled to said input circuits and responsive to the change in output of one of said input circuits assuming said second stable state to drive all of said input circuits to assume said disabled state, with all of said input circuits at said disabled state said input circuit at said second stable state being responsive to the trailing edge of said pulse to assume said first stable state said particular time duration after assuming said second stable state, and register means coupled to said input circuits and responsive to the output thereof to develop an output data signal indicating which of said input circuits assumes said second stable state and indicating said particular time duration, the master storage being coupled to said register means and being responsive to said output data signal to store said output signal.