Abstract
Circuits for radiation instrumentations utilizing the FCED (facing coupled Esaki diode) pair have been investigated experimentally. The circuits developed for trial purposes are as follows: (1) a voltage comparator with very small hysteresis; (2) a majority logic circuit having memory action; (3) a simple flip-flop circuit consisting of passive elements; (4) a normalizing circuit to normalize the input to a time position synchronizing with a clock signal; (5) a variable-width coincidence circuit which can continuously and accurately vary coincidence time width; (6) a shift register circuit with a very wide range of shifting interval. Subsequently, it was confirmed that these circuits applying the FCED principle work quite well and are of practical use. Further, in the case of an on-line experiment using a computer treating random phenomena, as in radiation instrumentation, these circuits serve as a good converter between the experimental system and the computer.
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