公开(公告)号：US20030058056A1

公开(公告)日：2003-03-27

申请号：US10254620

申请日：2002-09-25

发明人： Kouichi Moriya ,  Kuichi Kubo ,  Katsuyuki Sato ,  Yoshinori Narita

IPC分类号： H03B005/32

CPC分类号： H03B5/368 ,  H01L2924/16195

摘要： A surface mounting quartz crystal oscillator has an IC chip containing an oscillator circuit, and a quartz crystal unit which are sealed in a container body by a metal cover, wherein stray capacitances C1, C2 are equivalently in parallel with oscillation capacitors Ca, Cb connected to one and the other ends of the crystal unit, respectively. A gap between the IC chip and a crystal blank of the crystal unit, and a gap between the crystal blank and metal cover are set in accordance with a changing amount of the oscillation frequency due to a change in the stray capacitances C1, C2 in a direction in which a change in equivalent series capacitance is reduced, as viewed from the crystal unit, while maintaining a spacing between the IC chip and metal cover.

摘要翻译： 表面安装石英晶体振荡器具有含有振荡电路的IC芯片和通过金属盖密封在容器主体中的石英晶体单元，其中杂散电容C1，C2等效地与连接到 分别是晶体单元的一端和另一端。 根据由于杂散电容C1，C2的变化引起的振荡频率的变化量，设定晶体单元的IC芯片和晶体坯料之间的间隙以及晶体坯料与金属盖板之间的间隙 在从晶体单元观察时，等效串联电容的变化减小的方向，同时保持IC芯片和金属盖之间的间隔。

公开(公告)号：US20030020556A1

公开(公告)日：2003-01-30

申请号：US10205999

申请日：2002-07-26

发明人： Kuichi Kubo ,  Fumio Asamura

IPC分类号： H03B005/32

CPC分类号： H03L1/023

摘要： A temperature-compensated crystal oscillator with good phase noise characteristics has a crystal unit, a voltage-variable capacitive element inserted in a closed oscillating loop including the crystal unit, and an amplifier for keeping oscillation in the closed oscillating loop. The frequency vs. temperature characteristics of the temperature-compensated crystal oscillator can be compensated for by the temperature compensating voltage input thereto. The temperature compensating voltage is applied to an anode of the voltage-variable capacitive element, and a voltage to prevent a current from flowing through the voltage-variable capacitive element is applied to a cathode of the voltage-variable capacitive element. The voltage-variable capacitive element preferably comprises a variable-capacitance diode.

摘要翻译： 具有良好相位噪声特性的温度补偿晶体振荡器具有晶体单元，插入包括晶体单元的闭合振荡环中的可变电容元件和用于在闭合振荡环中保持振荡的放大器。 温度补偿晶体振荡器的频率对温度特性可以通过输入到其的温度补偿电压进行补偿。 将温度补偿电压施加到电压可变电容元件的阳极，并且将防止电流流过可变电容元件的电压施加到电压可变电容元件的阴极。 电压可变电容元件优选地包括可变电容二极管。

公开(公告)号：US20020125964A1

公开(公告)日：2002-09-12

申请号：US09801452

申请日：2001-03-08

发明人： Darrell Lee Ash

IPC分类号： H03B005/32 ,  H03H009/145

CPC分类号： H03B5/326

摘要： To secure the benefits of a low phase noise, wide tune range SAW oscillator in noisy environments, the tunable two port SAW resonator circuit within the oscillator is employed in differential mode, connected to a differential amplifier circuit to create a differential oscillator. In the absence of any need for ground or power supply voltage level references, low phase noise/edge jitter is maintained even in hostile environments while providing sufficient tune range to track small frequency changes. The resulting differential mode SAW oscillator is thus well-suited for use, for instance, in clock recovery within SONET applications.

摘要翻译： 为了确保在噪声环境中的低相位噪声，宽调谐范围的SAW振荡器的优点，振荡器内的可调谐双端口SAW谐振电路被用于差分模式，连接到差分放大器电路以产生差分振荡器。 在不需要接地或电源电压电平基准的情况下，即使在恶劣环境中也能保持低相位噪声/边缘抖动，同时提供足够的调谐范围来跟踪小的频率变化。 因此，所得到的差分模式SAW振荡器非常适用于例如SONET应用中的时钟恢复。

公开(公告)号：US20020125963A1

公开(公告)日：2002-09-12

申请号：US09801411

申请日：2001-03-08

发明人： Darrell Lee Ash

IPC分类号： H03B005/32 ,  H03H009/145

CPC分类号： H03B5/326

摘要： A two port, single pole SAW resonator is employed for a local oscillator to eliminate the secondary frequency responses of the prior art without adding additional inductances and capacitances within an amplifier stage. The stray capacitance which is seen within the equivalent circuit of a single pole, two port SAW resonator at a port for the SAW resonator is tuned out by coupling an appropriately sized inductance in parallel with that stray capacitance. Access to the series resonator within the SAW resonator equivalent circuit is thus provided, permitting direct tuning of the resonant frequency for the SAW resonator. The high Q of the SAW resonator ensures low phase noise/edge jitter, while direct tuning of the series resonator enables a wide tune range. The tunable SAW resonator circuit is thus well-suited for use in a low phase noise tunable oscillator employed, for instance, in clock recovery within SONET applications.

摘要翻译： 双端口SAW谐振器用于本地振荡器以消除现有技术的次级频率响应，而不在放大器级内增加额外的电感和电容。 在用于SAW谐振器的端口处的单极两端SAW谐振器的等效电路中看到的杂散电容通过将适当尺寸的电感与该杂散电容并联来调谐。 因此提供了进入SAW谐振器等效电路内的串联谐振器，允许直接调谐SAW谐振器的谐振频率。 SAW谐振器的高Q值确保了低相位噪声/边缘抖动，而串联谐振器的直接调谐可实现较宽的调谐范围。 因此，可调谐SAW谐振器电路非常适合用于例如在SONET应用中的时钟恢复中使用的低相位噪声可调谐振荡器。

公开(公告)号：US20020084862A1

公开(公告)日：2002-07-04

申请号：US10022278

申请日：2001-12-20

发明人： Naoki Fujii ,  Hiroshi Tomohiro ,  Mikio Nakajima ,  Keiichi Kami

IPC分类号： H03B005/32

CPC分类号： H03H3/04 ,  Y10T29/42 ,  Y10T29/49004 ,  Y10T29/49155 ,  Y10T29/49789 ,  Y10T29/49798

摘要： A manufacturing method for a ceramic oscillator capable of controlling the oscillation frequency with a high accuracy is disclosed. In this method, a mother substrate is polarized, electrodes in discrete ceramic oscillator units are formed, the mother substrate is cut into discrete ceramic oscillator units, an outer package is applied to each of the ceramic oscillators, and thus a ceramic oscillator as a finished product is achieved. Herein, the polarization processing for the mother substrate is executed by finishing the application of a high DC voltage, when the antiresonant frequency fa of the mother substrate in a thickness vibration mode is measured while the voltage is applied to the mother substrate, and the antiresonant frequency fa which is being measured has reached a target value of the antiresonant frequency of the mother substrate during polarization corresponding to a target oscillation frequency of the ceramic oscillator as a finished product.

摘要翻译： 公开了一种能够高精度地控制振荡频率的陶瓷振荡器的制造方法。 在这种方法中，母基板被极化，形成分立的陶瓷振荡器单元中的电极，将母基片切割成离散的陶瓷振荡器单元，外部封装被施加到每个陶瓷振荡器，因此陶瓷振荡器作为成品 产品实现。 这里，当在施加电压施加到母基板上测量厚度振动模式下的母基板的反谐振频率fa时，通过完成高直流电压的施加来执行​​母体基板的偏振处理，并且反谐振 正在测量的频率fa已达到对应于作为成品的陶瓷振荡器的目标振荡频率的极化期间母体衬底的反谐振频率的目标值。

公开(公告)号：US20020075089A1

公开(公告)日：2002-06-20

申请号：US09739812

申请日：2000-12-20

发明人： Shigeru Kurosawa

IPC分类号： H03B005/32

CPC分类号： H03B5/36

摘要： A high-frequency oscillation circuit incorporates a crystal oscillator having a natural oscillation frequency in a high-frequency area within a closed circuit including one or more logic elements. Therefore, this circuit copes with an oscillation frequency of 1 MHz to 2 GHz or more in basic oscillation frequency of a crystal oscillator and it oscillates with stability at the basic oscillation frequency of the crystal oscillator.

摘要翻译： 高频振荡电路包括在包括一个或多个逻辑元件的闭合电路内的高频区域中具有固有振荡频率的晶体振荡器。 因此，该电路在晶体振荡器的基本振荡频率下处理1MHz〜2GHz以上的振荡频率，并且在晶体振荡器的基本振荡频率下稳定地振荡。

公开(公告)号：US20040251979A1

公开(公告)日：2004-12-16

申请号：US10459929

申请日：2003-06-12

发明人： Meng-An (Michael) Pan

IPC分类号： H03B005/32

CPC分类号： H03B5/36 ,  H03B5/06

摘要： A fast starting on-chip crystal oscillation circuit includes a power supply (Vdd) integrated circuit pad, a power return (Vss) integrated circuit pad, a 1st crystal integrated circuit pad, a 2nd crystal integrated circuit pad, a 1st transistor, a 2nd transistor, an inverter, a resistor, and two capacitors. The 1st and 2nd crystal IC pads couple a 1st and 2nd node of an external crystal oscillator to the fast starting on-chip crystal oscillation circuit. The 1st transistor, when activated, couples a power source connection of the inverter to the Vdd IC pad. The 2nd transistor, when activated, couples a power return connection of the inverter to the Vss IC pad. The input of the inverter is coupled to the 1st crystal IC pad and the output of the inverter is coupled to the 2nd crystal IC pad. The resistor is coupled in parallel with the inverter while the 1st capacitor is coupled to the input of the inverter and to the Vss IC pad. The 2nd capacitor is coupled to the output of the inverter and to the Vss IC pad. When the 1st and 2nd transistors are activated, an impulse voltage occurs between the 1st and 2nd crystal IC pads to initiate the oscillation of the crystal oscillator.

摘要翻译： 快速启动片上晶体振荡电路包括电源（Vdd）集成电路焊盘，功率返回（Vss）集成电路焊盘，第一晶体集成电路焊盘，第二晶体集成电路焊盘， 1晶体管，2晶体管，反相器，电阻器和两个电容器。 第一和第二晶体IC焊盘将外部晶体振荡器的第1和第2个节点耦合到快速启动片上晶体振荡电路。 第1晶体管在激活时将逆变器的电源连接耦合到Vdd IC焊盘。 第2晶体管在被激活时将逆变器的电源返回连接耦合到Vss IC焊盘。 反相器的输入耦合到第1晶体IC焊盘，反相器的输出耦合到第2晶体IC焊盘。 电阻器与反相器并联耦合，而第1个电容器耦合到反相器的输入端和Vss IC焊盘。 第二电容器耦合到反相器的输出端和Vss IC焊盘。 当第1和第2晶体管被激活时，在第1和第2晶体IC焊盘之间产生脉冲电压，以引发晶体振荡器的振荡。

公开(公告)号：US20040189412A1

公开(公告)日：2004-09-30

申请号：US10741169

申请日：2003-12-19

申请人： Murata Manufacturing Co., Ltd.

发明人： Akira Kato

IPC分类号： H03B005/32

CPC分类号： H03B5/04 ,  H03B5/368

摘要： A temperature compensated piezoelectric oscillator that is capable of reducing the deterioration of phase noise caused by electrical-current noise, and an electronic device using the temperature compensated piezoelectric oscillator is arranged such that a connection point of a first resistor and a second resistor, which are connected in series between an external frequency control terminal and ground, is connected to the cathode of a variable capacitance diode. Furthermore, a capacitor for bypassing current noise, in which the impedance at a frequency that is lower than the oscillation frequency is sufficiently low so as to be capable of bypassing electrical-current noise generated from the resistors to ground, is provided between the connection point of the resistors and the ground. Electrical-current noise applied to the variable capacitance diode can be reduced, and the phase noise of the oscillation signal can be reduced.

摘要翻译： 能够降低由电流噪声引起的相位噪声恶化的温度补偿型压电振荡器和使用该温度补偿型压电振荡器的电子装置被配置为使得第一电阻器和第二电阻器的连接点为 串联连接在外部频率控制端子和地之间，连接到可变电容二极管的阴极。 此外，用于绕过电流噪声的电容器，其中在低于振荡频率的频率处的阻抗足够低以便能够绕过从电阻器接地产生的电流噪声，连接点 的电阻和地面。 可以减小施加到可变电容二极管的电流噪声，并且可以减小振荡信号的相位噪声。

公开(公告)号：US20040155718A1

公开(公告)日：2004-08-12

申请号：US10749182

申请日：2003-12-30

发明人： Hirofumi Kawashima

IPC分类号： H03B005/32

CPC分类号： H03H9/1021 ,  H03B5/32 ,  H03H3/02 ,  H03H9/0547 ,  H03H9/215 ,  H03H2003/026 ,  H03H2003/0492 ,  H04R17/00 ,  H04R31/00 ,  Y10T29/42 ,  Y10T29/49004 ,  Y10T29/49005 ,  Y10T29/4913 ,  Y10T29/49574

摘要： The electronic apparatus comprises a display portion and a quartz crystal oscillator at least, and said electronic apparatus comprises at least one quartz crystal oscillator. Also, the at least one oscillator comprises a quartz crystal oscillating circuit comprising an amplification circuit and a feedback circuit. The feedback circuit is constructed by a flexural mode, quartz crystal tuning fork resonator or a length-extensional mode quartz crystal resonator and for example, the quartz crystal tuning fork resonator comprising tuning fork tines and tuning fork base that are formed integrally, is shown with novel shape and electrode construction. Also, the quartz crystal tuning fork resonator, capable of vibrating in a fundamental mode and having a high frequency stability can be provided with a small series resistance and a high quality factor, even when the tuning fork resonator is miniaturized. In addition, from a relationship of an amplification rate and a feedback rate, an output signal of the quartz crystal oscillating circuit having an oscillation frequency of the fundamental mode vibration for the quartz crystal tuning fork resonator can be provided with the high frequency stability.

摘要翻译： 电子设备至少包括显示部分和石英晶体振荡器，并且所述电子设备包括至少一个石英晶体振荡器。 而且，至少一个振荡器包括一个石英晶体振荡电路，它包括一个放大电路和一个反馈电路。 反馈电路由弯曲模式，石英音叉谐振器或长度拉伸模式石英晶体谐振器构成，例如，包括音叉形成的整流的音叉叉形音叉和音叉基座，例如， 新颖的形状和电极结构。 此外，即使音叉谐振器小型化，也能够以基波模式振动并且具有高频稳定性的石英晶体音叉谐振器具有小的串联电阻和高品质因数。 此外，根据放大率和反馈率的关系，可以提供具有石英音叉谐振器的基模振荡的振荡频率的石英振荡电路的输出信号，具有高频稳定性。

公开(公告)号：US20040130405A1

公开(公告)日：2004-07-08

申请号：US10478448

申请日：2003-11-21

发明人： Chandra Mohan ,  Kent Joseph Nysewander

IPC分类号： H03B005/32

CPC分类号： H03B5/362 ,  H03B5/366

摘要： A voltage controlled Colpitts type crystal oscillator includes a first crystal and a transistor coupled to the first crystal to provide positive feedback for generating an output oscillatory signal. A variable capacitance is coupled to the first crystal for producing a change in a frequency of the oscillatory signal when a corresponding change in the variable capacitance occurs. A first inductance is coupled in a resonant circuit that includes the variable capacitance and the first crystal having a value selected to provide a pulling range of at least 0.4% with respect to the frequency of the oscillatory signal. In one embodiment of the invention, a second crystal is coupled to the first crystal and included in the resonant circuit. An energy dissipating impedance is coupled in the resonant circuit to the first crystal for decreasing a Q characteristic of the first crystal to increase the pulling range of the oscillator. The first inductance separates the second crystal from each of the first crystal and the energy dissipating impedance to decrease an effect of the energy dissipating impedance on a Q characteristic of the second crystal.

摘要翻译： 电压控制的Colpitts型晶体振荡器包括第一晶体和耦合到第一晶体的晶体管，以产生用于产生输出振荡信号的正反馈。 当可变电容发生相应的变化时，可变电容耦合到第一晶体以产生振荡信号的频率变化。 第一电感耦合在包括可变电容的谐振电路中，并且第一晶体具有被选择用于相对于振荡信号的频率提供至少0.4％的牵引范围的值。 在本发明的一个实施例中，第二晶体耦合到第一晶体并包含在谐振电路中。 能量消散阻抗在谐振电路中耦合到第一晶体，用于降低第一晶体的Q特性以增加振荡器的拉伸范围。 第一电感将第二晶体与第一晶体中的每一个分离，并且消能阻抗减小了能量消散阻抗对第二晶体的Q特性的影响。