Pulse repetitive frequency discrimination system

TLDR: In this article, the authors proposed a method to detect and separate a string of constant-period pulses from mixed pulses by considering a time interval between two pulses belonging to mixed pulses to be a divisor and performing processing by dividing times from one end pulse to respective pulses by it in sequence.

Abstract: PURPOSE:To detect and separate a string of constant-period pulses from a string of mixed pulses by considering a time interval between two pulses, belonging to mixed pulses, to be a divisor and by performing processing by dividing times from one end pulse to respective pulses by it in sequence CONSTITUTION:A mixed pulse string from terminal 1 is applied via pulse-interval integrating circuit 2 to memory circuit 3 and time intervals from the 1st pulse of the pulse string to respective pulses are stored Among data from circuit 3, the maximum pulse interval is detected 4 and sent to divisor selecting circuit 5 Circuit 5 selects and sends this to dividing circuit 6, which divides by this interval the time intervals up to respective pulses read out from circuit 3, and from the results, a divisibility frequency is detected 7 and sent to divisibility frequency deciding circuit 8 and dividing circuit 6 Once circuit 8 decides that the divisibility frequency does not reach a fixed number, circuit 5 selects a new divisor to repeat the division and when the divisibility reaches the fixed number, a pulse interval selected at that time as the divisor is output as a repetitive frequency, so that circuit 6 removes the pulse string from circuit 3