公开(公告)号：US6160339A

公开(公告)日：2000-12-12

申请号：US254405

申请日：1999-07-07

申请人： Michiaki Takagi ,  Takashi Yamazaki

发明人： Michiaki Takagi ,  Takashi Yamazaki

IPC分类号： H03H9/25 ,  H01L41/08

CPC分类号： H03H9/25

摘要： To provide a two-port SAW resonator in which spurious responses causes by higher-order vertical inharmonic modes are suppressed, a pair of reflectors and three IDTs are provided on the surface of a piezoelectric plate. The frequency-increase rate of the second and third IDTs is set to be smaller than that of the first IDT so that the frequency-increase rate of the first IDT is 2000 to 12000 ppm. In addition, by setting the number of pairs of the electrodes of the second and third IDTs at 2.75 to 3.75 or a quarter of the number of pairs of the electrodes of all the IDTs, spurious responses caused by higher-order vertical inharmonic modes are suppressed, and equivalent series resistance is reduced to approximately 20.OMEGA.. Therefore, a two-port SAW resonator having a superior frequency stability in a high-frequency band of 500 MHz or higher is realized.

摘要翻译： PCT No.PCT / JP98 / 01569 Sec。 371日期：1999年7月7日 102（e）日期1999年7月7日PCT提交1998年4月3日为了提供一种双端口SAW谐振器，其中由高阶垂直非谐波模式引起的寄生响应被抑制，一对反射器和三个IDT 压电板表面。 将第二IDT和第三IDT的频率增加率设定为小于第一IDT的频率增加率，使得第一IDT的增频率为2000〜12000ppm。 此外，通过将第二和第三IDT的电极对数设定在2.75至3.75或所有IDT的电极对中的四分之一，抑制由高阶垂直非谐波模式引起的杂散响应 ，等效串联电阻降低到约20欧米茄。 因此，实现了在500MHz以上的高频带中具有优异的频率稳定性的双端口SAW谐振器。

公开(公告)号：US5607236A

公开(公告)日：1997-03-04

申请号：US268406

申请日：1994-06-30

申请人： Michiaki Takagi ,  Mitsuru Nagai

发明人： Michiaki Takagi ,  Mitsuru Nagai

IPC分类号： G01K11/22

CPC分类号： G01K11/22

摘要： A quartz oscillator temperature sensor which measures temperature based on the change in resonance or oscillation frequency of a quartz oscillator with the change in temperature the oscillator can be constructed by cutting a piece of quartz from a wafer with a thickness of about 80 to 150 .mu.m by rotating the plane of the crystal defined by the electrical and mechanical axes 15.degree. to 25.degree. about the electrical axis and then forming the wafer into a quartz tuning fork. The tuning fork is housed in a case sealed with a stem and coupled to electrical leads with heat resistent solder formed with more than about 90 wt % Pb and less than 10% Sn. The area within the case should be at a substantially high vacuum.

摘要翻译： 一种石英振荡器温度传感器，其基于随着温度变化的石英振荡器的谐振或振荡频率的变化来测量温度，振荡器可以通过从具有约80至150μm的厚度的晶片切割一块石英 通过围绕电轴将由机电轴和机械轴15°至25°限定的晶体的平面旋转，然后将晶片形成石英音叉。 音叉放置在一个用一个杆密封的外壳中，并与电线连接，耐热焊料形成的铅含量大于约90％，小于10％。 外壳内的面积应处于基本高的真空度。