Binary to pseudo-ternary code converting circuit - has load input of shift register connected to coincidence gate outputs and to multi-switch via delay element

摘要

Telecommunications circuitry is esp. for telephone exchanges in which sequential binary signals are transmitted in pseudo-ternary form form. The binary signals are fed to a shift register for intermeW intermediate storage. The signals are pulse controlled as they pass through the register and are supplied to a multi switch for conversion to pseudo-ternary signals. The multi switch re-delivers the logic one binary signals with alternating polarity and the logic null unchanged. The outputs of the shift register are separately coupled to the inputs of a coincidence gate. The latter monitors the binary signals entered into the shift register for re-delivering as a continuous series of n+1 binary signals of the opposite type-one or null, except for the last series. A binary signal of the same type-one or null- is formed instead and stored in the corresponding position in the register.