公开(公告)号：US2085008A

公开(公告)日：1937-06-29

申请号：US4793335

申请日：1935-11-02

Applicant: RCA CORP

Inventor： CROSBY MURRAY G

IPC: H03D3/16

CPC classification number: H03D3/16

公开(公告)号：US11140725B2

公开(公告)日：2021-10-05

申请号：US16601962

申请日：2019-10-15

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Filip Mestanov ,  Stephen Rayment

IPC: H03D3/16 ,  H04W76/10 ,  H04W12/06 ,  H04W36/14 ,  H04L29/06 ,  H04W48/12 ,  H04W12/50 ,  H04W8/00 ,  H04W8/02 ,  H04W48/00

Abstract: Embodiments include methods performed by a network node in a wireless communication network. The node is part of a first BSS that is one of a plurality of BSS in a Mobility Domain (MD) that supports a Fast BSS Transition procedure. Such methods include transmitting one or more Fast Initial Link Setup Discovery (FD) frames. Each FD frame includes an identifier of the first MD, which enables receiving devices to determine, without receiving any non-FD frames from the network node, whether to associate with the network node via the Fast BSS Transition procedure. Such methods include associating with a first device through the Fast BSS procedure, wherein the first wireless communication device was previously associated with one of the BSS in the MD. Other embodiments include complementary methods performed by devices, as well as network nodes and devices configured to perform such methods.

公开(公告)号：US4583047A

公开(公告)日：1986-04-15

申请号：US659232

申请日：1984-10-09

Applicant: Jeannine Le Goff epouse Henaff ,  Jacques Veillard ,  Daniel Pommier

Inventor： Jeannine Le Goff epouse Henaff ,  Jacques Veillard ,  Daniel Pommier

IPC: H04N7/20 ,  H03D3/16 ,  H04B7/185 ,  H04L27/18 ,  H04L27/233 ,  H03D3/00

CPC classification number: H03H9/68 ,  H03D3/16 ,  H04L27/2331

Abstract: The circuit comprises a surface acoustic wave device. On the substrate (32)f the surface acoustic wave device, are provided two pairs of input transducers (33, 34, 35, 36) connected, in parallel, to the input of the circuit. The transducers (33, 34, 35, 36) initiate surface acoustic waves corresponding to the signals applied on two pairs of paths (41, 42, 43, 44) ending at two pairs of reception transducers (37, 38, 39, 40). The outputs of the output transducers of the first pair (37, 38) are connected to the two inputs of a mixer (28) whose output yields the received digital signal. The outputs of the second pair of transducers (39, 40) are connected to the inputs of two limiters (26, 27) whose outputs are connected to the two inputs of a mixer (29) whose output yields the analog signal. The difference in path lengths of the first pair (41, 42) introduces a delay of the order of one bit and the difference in path lengths of the second pair (43, 44) introduces a delay equal to the inverse of twice the bandwidth between the peaks of the discriminator thus constituted.

Abstract translation: 电路包括声表面波装置。 在声表面波装置的基板（32）上设置两对并联连接到电路的输入端的输入传感器（33,34,35,36）。 换能器（33,34,35,36）发起对应于施加在以两对接收换能器（37,38,39,40）结束的两对通路（41,42,43,44）上的信号的表面声波， 。 第一对（37,38）的输出换能器的输出端连接到输出产生接收到的数字信号的混频器（28）的两个输入端。 第二对换能器（39,40）的输出连接到两个限制器（26,27）的输入端，输出端连接到输出产生模拟信号的混频器（29）的两个输入端。 第一对（41,42）的路径长度的差异引入了一个比特的顺序的延迟，并且第二对（43,44）的路径长度的差引入了等于两倍于 因此构成鉴别器的峰值。

公开(公告)号：US4581556A

公开(公告)日：1986-04-08

申请号：US642809

申请日：1984-08-21

Applicant: Takashi Yamamoto

Inventor： Takashi Yamamoto

IPC: H03D3/16 ,  H03H9/56 ,  H01L41/08

CPC classification number: H03H9/566

Abstract: A piezoelectric resonating device utilizes double thickness vibration mode of the energy-trapped type and comprises a piezoelectric plate, input and output electrodes disposed at one surface of the piezoelectric plate and a common ground electrode disposed at the other surface of the plate. The common ground electrode is disposed to face against the input and output electrodes and the input and output electrodes are formed by a plurality of electrode segments. A plurality of piezoelectric resonating segments are coupled together each comprising the respective electrode segments and the common ground electrode.

Abstract translation: 压电谐振装置利用能量捕获型的双重振动模式，并且包括压电板，设置在压电板的一个表面处的输入和输出电极以及设置在板的另一个表面上的公共接地电极。 公共接地电极被设置为面对输入和输出电极，并且输入和输出电极由多个电极段形成。 多个压电谐振段被耦合在一起，每个压电谐振段包括相应的电极段和公共接地电极。

公开(公告)号：US4418320A

公开(公告)日：1983-11-29

申请号：US419264

申请日：1982-09-17

Applicant: James H. Guyton

Inventor： James H. Guyton

IPC: H03D3/16

CPC classification number: H03D3/16

Abstract: A high frequency discriminator is disclosed with a phase shift circuit using a piezoelectric crystal and a series connected load resistor. The voltage across the load resistor is shifted in phase an amount corresponding to the deviation of the input signal voltage from its center frequency. This phase shifting circuit may be connected in cascade with a 90.degree. phase shift circuit to produce the quadrature voltage for the discriminator. The discriminator provides very low distortion in the output.

Abstract translation: 公开了一种使用压电晶体和串联负载电阻的相移电路的高频识别器。 负载电阻两端的电压相位偏移与输入信号电压与其中心频率的偏差相对应。 该相移电路可以与90°相移电路级联连接，以产生鉴频器的正交电压。 鉴频器在输出端提供非常低的失真。

公开(公告)号：US4207535A

公开(公告)日：1980-06-10

申请号：US888123

申请日：1978-03-20

Applicant: Aristotelis S. Arvanitis

Inventor： Aristotelis S. Arvanitis

IPC: H03D3/16

CPC classification number: H03D3/16

Abstract: A two-pole fixed-tuned monolithic crystal frequency discriminator circuit is provided wherein a tuned circuit is utilized connected between the center pin of the two-pole crystal device and ground. In this manner, two bandpass filters are effectively provided wherein the respective outputs thereof may be rectified and combined so as to obtain the desired audio output. The result is a two-pole discriminator device with the linear portion of the conventional "S" curve having a substantially wider response characteristic than for any heretofore known monolithic crystal discriminator. Additionally, it does not need further tuning adjustments and it exhibits substantially better temperature stability and small size as well as a cost saving in manufacture as compared to a comparable three-pole device.

Abstract translation: 提供了一种双极固定调谐单片晶体鉴频器电路，其中利用连接在两极晶体器件的中心引脚和地之间的调谐电路。 以这种方式，有效地提供了两个带通滤波器，其中其各自的输出可以被整流和组合，以获得所需的音频输出。 结果是两极识别器件，其传统的“S”曲线的线性部分的响应特性比迄今为止已知的单片晶体鉴别器具有更大的响应特性。 另外，与可比较的三极器件相比，它不需要进一步的调谐调整，并且其显示出显着更好的温度稳定性和小尺寸以及制造成本。

公开(公告)号：US4054841A

公开(公告)日：1977-10-18

申请号：US686387

申请日：1976-05-14

Applicant: Jeannine Le Goff Henaff ,  Gilbert Lainey ,  Michel France Carel

Inventor： Jeannine Le Goff Henaff ,  Gilbert Lainey ,  Michel France Carel

IPC: H03H9/42 ,  H04L27/18 ,  H04L27/233 ,  H03D3/16

CPC classification number: H03H9/68 ,  H04L27/2331

Abstract: A differential demodulator of phase-modulated digital data trains includes a device, for example a piezoelectric substrate, which transmits acoustic surface waves and includes comb-shaped input and output transducers on the substrate. The delay in the transmission of acoustic surface waves between the input and output transducers is used in the process of demodulating the phase modulated digital data trains.

Abstract translation: 相位调制数字数据列的差分解调器包括传输声表面波并在基片上包括梳形输入和输出换能器的装置，例如压电基片。 在对相位调制数字数据列进行解调的过程中，使用输入和输出换能器之间的声表面波传输的延迟。

公开(公告)号：US4041335A

公开(公告)日：1977-08-09

申请号：US288977

申请日：1972-09-14

Applicant: Takashi Nagata ,  Michio Ishibashi ,  Yasuo Nakajima

Inventor： Takashi Nagata ,  Michio Ishibashi ,  Yasuo Nakajima

IPC: C04B35/46 ,  C04B35/48 ,  C04B35/50 ,  C04B35/51 ,  H01L41/053 ,  H03B5/36 ,  H03D3/16 ,  H03H9/09 ,  H03H9/17 ,  H01L41/04

CPC classification number: H03H9/176 ,  C04B35/493 ,  C04B35/499 ,  H03B5/362 ,  H03D3/16 ,  H03H9/09 ,  C04B2235/3206 ,  C04B2235/3234 ,  C04B2235/3248 ,  C04B2235/3251 ,  C04B2235/3255 ,  C04B2235/768

Abstract: A damped piezoelectric ceramic resonator. The resonator is a thin flat plate of piezoelectric ceramic material which has parallel major planar surfaces and is polarized in one direction in such a way that said direction is at an angle of from 0.degree. to 60.degree. with respect to said major surfaces, the thickness dimension of said plate being such as to impart thereto a resonance of vibrations in a thickness-shear mode at a particularly selected frequency higher than one megacycle. Operating electrodes are applied to said major planar surfaces. Vibration damping means is attached tightly to the contour of the edge of said flat plate so as to suppress unwanted resonance vibrations in said flat plate during operating. The vibration damping means is a ring of a rubber material having a hardness from 20 to 70 on the Shore A Scale and is under a tension of 20-500 gm/cm.

Abstract translation: 阻尼压电陶瓷谐振器。 谐振器是压电陶瓷材料的薄平板，其具有平行的主平面并且在一个方向上被极化，使得所述方向相对于所述主表面成0°至60°的角度，厚度 所述板的尺寸使得能够以高于一兆兆瓦的特别选择的频率赋予厚度 - 剪切模式的振动共振。 操作电极施加到所述主平面上。 振动阻尼装置紧紧地附接到所述平板的边缘的轮廓，以便在操作期间抑制所述平板中的不期望的共振振动。 振动阻尼装置是在肖氏A刻度上具有20至70的硬度并且处于20-500gm / cm 2的张力的橡胶材料的环。

公开(公告)号：US4013970A

公开(公告)日：1977-03-22

申请号：US659555

申请日：1976-02-19

Applicant: Takashi Nagata ,  Yasuo Nakajima ,  Teruo Kitani

Inventor： Takashi Nagata ,  Yasuo Nakajima ,  Teruo Kitani

IPC: H03D3/16

CPC classification number: H03D3/16

Abstract: A frequency discriminating apparatus is constituted by a piezoelectric ceramic resonator, a reference capacitor, a pre-amplifier including a broad tuning circuit, a pair of amplitude detectors, and a differential amplitude limiter. The piezoelectric ceramic resonator is made of a piezoelectric lead titanate ceramic plate having a pair of electrodes covering the entire area of the major surfaces thereof, and the plate is poled with a poling field of not less than 50 kV/cm in the thickness direction. The thickness of the plate is chosen so as to cause the plate to vibrate in the thickness-extensional vibration of the 3rd harmonic overtone at a preselected frequency when an electrical signal is applied to the pair of electrodes. The differential amplitude limiter differentially adds the two signals detected by the two amplitude detectors and limits the peak output voltage amplitudes to a predetermined amplitude. The center frequency for the frequency discrimination by this apparatus can be stably maintained according to this apparatus, and the apparatus can be easily manufactured in the form of integrated circuits without necessitating many value adjustments of circuit elements.

公开(公告)号：US4006424A

公开(公告)日：1977-02-01

申请号：US656225

申请日：1976-02-09

Applicant: Charles W. Pond

Inventor： Charles W. Pond

IPC: H03D3/16

CPC classification number: H03D3/16

Abstract: Frequency discriminators are disclosed employing a crystal filter having a predetermined voltage versus frequency characteristic including a discriminator operating portion slightly below the filter lower cutoff frequency along which the voltage varies substantially linearly as a function of frequency. Detector circuitry rectifies the output voltage from the crystal filter, while voltage level shifting circuitry algebraically combines the output voltage from the detector with a dc voltage such that the algebraic sum of the dc voltage and the detector output voltage is zero when the instantaneous frequency of the input signal to the discriminator is at the discriminator center frequency. The discriminator is constructed without the use of any crystal resonator having a series resonant frequency within the discriminator passband; hence spurious series resonances occur outside of the discriminator passband, thereby facilitating wideband operation.

Abstract translation: 公开了使用具有预定电压对频率特性的晶体滤波器的频率鉴别器，其包括稍微低于滤波器下限截止频率的鉴别器操作部分，沿着该鉴频器操作部分，电压随频率基本上线性变化。 检测器电路对晶体滤波器的输出电压进行整流，而电压电平移位电路代表性地将检测器的输出电压与直流电压组合，使得当直流电压和检测器输出电压的代数和为零时， 到鉴频器的输入信号处于鉴别器中心频率。 在鉴别器通带内不使用具有串联谐振频率的任何晶体谐振器构成鉴别器; 因此杂散串联谐振发生在鉴别器通带之外，从而便于宽带操作。