A Direct Reading Counting Rate Ratio Meter

概要

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A nonlogarithmic direct reading counting rate ratio meter was constructed, which proved to be more stable and precise than the logarithmic one using diode character. A counting rate f_1 of channel 1 was applied to the rate meter which Is very similar to the conventional meter only with an alteration in the charging circuit of the pumping condenser, which is made to give the charge modulated by a D.C. voltage proportional to 1/f_2(f_2 being the counting rate of channel 2). Thus arranged, the out-put of the rate meter became proportional to f_1/f_2, namely the rate ratio. The D.C. voltage proportional to 1/f_2 was generated by utilizing a low. pass filter and a saw-tooth generator. The height of the saw-tooth voltage was made to be proportional to the pulse interval, 1/f_2 by controlling the start and stop of the saw-tooth voltage with a pair of adjacent pulse from channel 2. The statistics of the 1/f_2 D.C. voltage and the rate ratio was also described.
社団法人日本物理学会の論文
1956-04-05