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1.发明授权Method for testing a crystal wherein the crystal is connected in series with a conductive core to form a single current conducting loop 失效用于测试晶体中的晶体的方法用串联连接到导电芯以形成单个导电环路
公开(公告)号：US3490036A
公开(公告)日：1970-01-13
申请号：US3490036D
申请日：1968-01-15
申请人： WESTERN ELECTRIC CO
发明人： GRENIER ROBERT P
CPC分类号： G01R29/22
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2.发明授权Method and system for adjusting electrical components using alternately applied signals 失效使用异步应用信号调整电气元件的方法和系统
公开(公告)号：US3600675A
公开(公告)日：1971-08-17
申请号：US3600675D
申请日：1969-12-30
申请人： WESTERN ELECTRIC CO
发明人： GRENIER ROBERT P
摘要： A crystal filter or similar electrical component is adjusted by application to the filter of a characteristic adjusting medium, such as evaporated or sputtered gold, in order to provide a desired differential insertion loss with respect to output signals corresponding to two input signals generated at two frequencies of interest. The two input signals are applied sequentially to the filter with the signal levels of the input signals calibrated to differ by a quantity equal to the desired differential insertion loss. An initial calibration, utilizing a signal attenuator, provides this differential. Treatment then occurs, with the output of the crystal being continuously monitored by a signal amplitude measuring device. An AC monitoring signal, representing the alternating output signal levels corresponding to the sequentially applied input signals, is generated from the signal amplitude measuring device. A phase reversal in the AC monitoring signal is sensed by a phase detector, which generates a control signal to terminate the treatment operation. The phase reversal occurs at the instant that the desired differential insertion loss value is attained.
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3.发明授权System for generating a smoothly and continuously varying signal having a variable frequency 失效用于产生具有可变频率的平滑且连续变化的信号的系统
公开(公告)号：US3383625A
公开(公告)日：1968-05-14
申请号：US58422666
申请日：1966-10-04
申请人： WESTERN ELECTRIC CO
发明人： GRENIER ROBERT P
IPC分类号： H03B23/00
CPC分类号： H03B23/00
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