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Method for measuring parameters of quartz crystal unit and a non- reactive constant resistance element for carrying out the same
Method for measuring parameters of quartz crystal unit and a non- reactive constant resistance element for carrying out the same
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机译:石英晶体单元的参数测量方法和用于执行该方法的非电抗恒电阻元件
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摘要
The present invention discloses a method of constructing a non- reactive high frequency constant resistance unit to be used for measuring parameters of quartz crystal units described in U.S. Pat. No. 3, 832,631 and U.S. Pat. No. 3,872,385. First, a non-reactive frequency of a crystal unit A is determined, a radio-frequency current is supplied to the series circuit A+ B composed of said crystal unit A and a circuit B which is adjustable to non-reactiveness, and the circuit B is adjusted so that the phase of the terminal voltage across said series circuit A+B coincides with the phase of the terminal voltage across the circuit B. Next, said crystal unit A is replaced by an element A, whose construction is similar to the said circuit B, and is adjustable to non-reactiveness, and the element A is adjusted so that the phase of the terminal voltage across said series circuit A+B coincides with the phase of the terminal voltage across the circuit B. Lastly, the construction of A is fixed, whereby said element A is always available as a substitute for A, for checking the non-reactiveness of the circuit B.
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