パラメータ励振作用による分周器を用いたトランジスタ水晶時計

概要

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When a nonlinear inductance is excited by a current of a certain frequency, a subharmonic of half the frequency of the current oscillates a tank circuit comprising the nonlinear inductance and a capacitance. The divided ratio of a frequency divider connected with a multistage is the product of the divided ratio of the individual stages. The input frequency is divided by 2ⁿ. This divider is very stable and of long life since it comprise inductances and condensers. In this paper, an application of the frequency divider which utilizes parametric oscillation is described. It can make use of a frequency divider of a crystal-controlled clock. The divider is excited by the current of the frequency 6400 c/s which is the output of the quartz crystal oscillator. The divided ratio of the frequency divider is 1/128, consequently, the output of the divider is 50 c/s. This is amplified with a transistor amplifier. The synchronous motor is rotated by the output 2 watts. The principle of the clock and its characteristics are also treated.
信州大学工学部の論文
1961-12-28