The Generation of Binomially-Distributed Pseudo-Random Electrical Signals

摘要

1,172,617. Random pulse generators. SOLARTRON ELECTRONIC GROUP Ltd. 16 Sept., 1968 [18 Sept., 1967], No. 42450/67. Heading G4D. The amplitudes of successive pulses are arranged according to a binomial distribution. Two stages of a clock-controlled shift register 10 feed a half-adder 13 which acts as input to the shift register. Whenever the outputs of stages 1 and r are 1 and 0, or 0 and 1, so a binary counter 25 is advanced or reversed. The counter supplies potential through weighted resistors and an amplifier 16 to an output. If there are n stages in the register the cycle produces 2n-1 pulses and n+1 different values of output. A correction circuit (Fig. 4, not shown) may be added so that the counter is reset each time all stages of the shift register are at 1.