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100 条记录 (耗时 0.019 秒)

    Multifrequency control from a single crystal
    1.
    发明授权
    Multifrequency control from a single crystal 失效
    来自单晶的多频控制

    公开(公告)号：US4227158A

    公开(公告)日：1980-10-07

    申请号：US008459

    申请日：1979-02-01

    申请人： George F. Schroeder ,  Lincoln S. Ferriss

    发明人： George F. Schroeder ,  Lincoln S. Ferriss

    IPC分类号： H03D3/16 ,  H03L7/02

    CPC分类号： H03L7/02 ,  H03D3/16

    摘要： A piezo-electric crystal vibrating in several modes controls several frequencies generated by voltage controlled oscillators simultaneously. The output of each voltage controlled oscillator is fed to a summing amplifier which drives the crystal. The output of the crystal is fed to individual phase detectors; each phase detector is also supplied with the output of a voltage controlled oscillator and generates a voltage proportional to the phase difference between the voltage controlled oscillator and the crystal output for correcting the output frequency of each oscillator.

    摘要翻译： 以多种模式振动的压电晶体同时控制由压控振荡器产生的多个频率。 每个压控振荡器的输出被馈送到驱动晶体的求和放大器。 晶体的输出被馈送到各个相位检测器; 每个相位检测器还被提供有压控振荡器的输出，并且产生与压控振荡器和晶体输出之间的相位差成比例的电压，用于校正每个振荡器的输出频率。

    Acoustic surface wave devices using Tl.sub.3 TaS.sub.4 and Tl.sub.3 TaSe.sub.4 crystals
    2.
    发明授权
    Acoustic surface wave devices using Tl.sub.3 TaS.sub.4 and Tl.sub.3 TaSe.sub.4 crystals 失效
    声表面波器件使用Tl {hd 3 {b TaS {HD 4 {B和Tl {hd 3 {b TaSe {hd 4 {b crystal

    公开(公告)号：US3940717A

    公开(公告)日：1976-02-24

    申请号：US540193

    申请日：1975-01-10

    申请人： Thelma J. Isaacs ,  Robert W. Weinert

    发明人： Thelma J. Isaacs ,  Robert W. Weinert

    IPC分类号： H03D3/16 ,  H03H9/02 ,  H03H9/26 ,  H01L41/08 ,  H01L41/18 ,  H03H9/30

    CPC分类号： H03H9/02834 ,  H03D3/16 ,  H03H9/02543

    摘要： An acoustic surface wave device is disclosed which comprises a crystal of Tl.sub.3 TaS.sub.4, Tl.sub.3 TaSe.sub.4, or mixtures thereof having at least one surface suitable for the propagation of surface waves, a surface wave generating transducer mounted on the surface, and a surface wave receiving transducer mounted on the surface positioned to receive a surface wave generated by the surface wave generating transducer.The device transmits surface waves at a low velocity and high coupling efficiency and can be used in a delay line, a filter, an FM discriminator, an oscillator, or other device.

    摘要翻译： 公开了一种声表面波装置，其包括具有至少一个表面波传播的表面的Tl3TaS4，T13TaSe4或其混合物的晶体，安装在表面上的表面波发生换能器和安装在其上的表面波接收换能器 该表面被定位成接收由表面波发生换能器产生的表面波。

    Piezoelectric phase detector
    3.
    发明授权
    Piezoelectric phase detector 失效
    压电相位检测器

    公开(公告)号：US3882332A

    公开(公告)日：1975-05-06

    申请号：US17343471

    申请日：1971-08-20

    申请人： ROCKWELL INTERNATIONAL CORP

    发明人： FRYMOYER EDWARD M

    IPC分类号： H03D3/16 ,  H04R17/00

    CPC分类号： H03D3/16

    摘要： A phase detector using crystal filters in two signal paths subject to signal phase detection with a single piezoelectric material unit common to and interconnecting the crystal filters of the two signal paths. A signal combining electrode also on the single piezoelectric material unit is connected to a following amplitude detection circuit section.

    摘要翻译： 一种相位检测器，在两个信号路径中使用晶体滤波器，该信号通过信号相位检测与单个压电材料单元共同并互连两个信号路径的晶体滤波器。 单个压电材料单元上的信号组合电极连接到随后的振幅检测电路部分。

    Surface wave frequency discriminator
    4.
    发明授权
    Surface wave frequency discriminator 失效
    表面波频率分辨器

    公开(公告)号：US3835422A

    公开(公告)日：1974-09-10

    申请号：US32254473

    申请日：1973-01-10

    申请人： THOMSON CSF

    发明人： HARTEMANN P

    IPC分类号： H03D3/16 ,  H03H9/26 ,  H03D3/26

    CPC分类号： H03D3/16

    摘要： The present invention relates to frequency discriminators. The frequency discriminator in accordance with the invention comprises a pair of surface wave electromechanical filters deposited upon a single substrate; the spectral responses of the filters are offset in frequency and have a triangular profile so that by subtraction of the detected voltages at the output of these filters, an S characteristic is obtained.

    摘要翻译： 本发明涉及频率鉴别器。 根据本发明的鉴频器包括沉积在单个衬底上的一对表面波机电滤波器; 滤波器的频谱响应在频率上偏移并且具有三角形轮廓，使得通过在这些滤波器的输出处减去检测到的电压，获得S特性。

    Surface wave discriminator system
    10.
    发明授权
    Surface wave discriminator system 失效
    表面波鉴别系统

    公开(公告)号：US3987367A

    公开(公告)日：1976-10-19

    申请号：US499025

    申请日：1974-08-20

    申请人： Pierre Hartemann

    发明人： Pierre Hartemann

    IPC分类号： H03D3/16

    CPC分类号： H03D3/16

    摘要： The invention relates to surface wave discriminator systems comprising a substrate on the surface of which are arranged two electromechanical filters each incorporating two delay lines of dissimilar delay length. The amplitudes of the alternating voltages transmitted by said filters obey laws of variation as a function of the modulating quantity which take the form of sinusoidal half waves, offset by a quarter of a period, making it possible after differential detection to obtain a frequency or phase discrimination characteristic.

    摘要翻译： 本发明涉及表面波鉴别器系统，其包括一个表面上的衬底，两个机电滤波器被布置在两个机电滤波器中，每个机电滤波器包括两个不同延迟长度的延迟线。 由所述滤波器发送的交流电压的振幅遵循作为调制量的函数的变化规律，该调制量采取正弦波形的形式，偏移四分之一周期，使得在差分检测之后获得频率或相位成为可能 歧视特征。