公开(公告)号：US06798307B2

公开(公告)日：2004-09-28

申请号：US10403233

申请日：2003-03-28

申请人： Hiroaki Mizumura ,  Hidenori Harima

发明人： Hiroaki Mizumura ,  Hidenori Harima

IPC分类号： H03B532

CPC分类号： H03H9/1021 ,  H01L2224/48091 ,  H01L2224/73265 ,  H03B5/36 ,  H03H9/0547 ,  H03H9/0552 ,  H01L2924/00014

摘要： A sheet substrate for use in manufacturing surface-mount crystal oscillators has a plurality of container bodies fabricated thereon. Each of the container bodies is capable of accommodating at least one IC chip, and has a bottom face formed with a plurality of mount terminals and a top face which is capable of forming a crystal unit thereto. On the sheet substrate, each of the container bodies has a conductive path extending from the container body to an adjacent container body and connected to a mount terminal of the adjacent container body, and a chip carrying terminal connected to one end of the conductive path for use in electric connection with the IC chip.

摘要翻译： 用于制造表面贴装晶体振荡器的片状基片具有在其上制造的多个容器体。 每个容器体能够容纳至少一个IC芯片，并且具有形成有多个安装端子的底面和能够形成晶体单元的顶面。 在片状基板上，每个容器主体具有从容器主体延伸到相邻容器主体并连接到相邻容器主体的安装端子的导电路径，以及连接到导电路径的一端的芯片承载端子， 用于与IC芯片电连接。

公开(公告)号：US06798306B2

公开(公告)日：2004-09-28

申请号：US09739812

申请日：2000-12-20

申请人： Shigeru Kurosawa

发明人： Shigeru Kurosawa

IPC分类号： H03B532

CPC分类号： H03B5/36

摘要： A high-frequency oscillation circuit incorporates a crystal resonator 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 resonator and it oscillates with stability at the basic oscillation frequency of the crystal resonator.

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谐振器。 因此，该电路在晶体谐振器的基本振荡频率下处理1MHz〜2GHz以上的振荡频率，并且在晶体谐振器的基本振荡频率下稳定地振荡。

公开(公告)号：US06670860B2

公开(公告)日：2003-12-30

申请号：US09871902

申请日：2001-06-04

申请人： Yoshihiro Kobayashi ,  Takashi Endo

发明人： Yoshihiro Kobayashi ,  Takashi Endo

IPC分类号： H03B532

CPC分类号： H03B5/06

摘要： The invention provides an oscillator and a control method for controlling the oscillator which reliably oscillates even when the oscillator is driven at a low voltage. An oscillator repeats a startup operation and a suspension of the startup operation by turning on and off a switch with half a period of a Schmitt trigger oscillator circuit, until a piezoelectric oscillator circuit is put into a normal oscillation state. The oscillator thus creates a number of opportunities of transient response allowing the oscillation amplitude of the piezoelectric oscillator circuit to grow, and reliably oscillates.

公开(公告)号：US06657507B2

公开(公告)日：2003-12-02

申请号：US10038000

申请日：2002-01-02

申请人： Robert R. Fulton ,  Chinnugounder Senthilkumar ,  Tea Lee

发明人： Robert R. Fulton ,  Chinnugounder Senthilkumar ,  Tea Lee

IPC分类号： H03B532

CPC分类号： H03B5/32 ,  H03B5/04

摘要： An oscillator circuit including an integrated circuit amplifier, an integrated circuit active resistance circuit to set the gain of the amplifier, a crystal resonator to set the frequency of the signal generated by the oscillator circuit, and a pair of capacitors respectively situated at the inputs and outputs of the amplifier to assist in the starting of the oscillation signal. The active resistance circuit is responsive to an input signal in order to set the gain of the amplifier slightly above unity gain in order to meet the criterion for oscillation, but not too much above unity gain where the oscillator would unduly consume too much power. Thus, the oscillator has inherent low power characteristics. The active resistance circuit allows the amplifier gain to be set by software or other electronic means.

公开(公告)号：US06624708B1

公开(公告)日：2003-09-23

申请号：US10183112

申请日：2002-06-25

申请人： Kurt O. Wessendorf

发明人： Kurt O. Wessendorf

IPC分类号： H03B532

CPC分类号： H03B5/36

摘要： An oscillator circuit is disclosed which can be used to produce oscillation using a piezoelectric crystal, with a frequency of oscillation being largely independent of any shunt capacitance associated with the crystal (i.e. due to electrodes on the surfaces of the crystal and due to packaging and wiring for the crystal). The oscillator circuit is based on a tuned gain stage which operates the crystal at a frequency, f, near a series resonance frequency, fS. The oscillator circuit further includes a compensation circuit that supplies all the ac current flow through the shunt resistance associated with the crystal so that this ac current need not be supplied by the tuned gain stage. The compensation circuit uses a current mirror to provide the ac current flow based on the current flow through a reference capacitor that is equivalent to the shunt capacitance associated with the crystal. The oscillator circuit has applications for driving piezoelectric crystals for sensing of viscous, fluid or solid media by detecting a change in the frequency of oscillation of the crystal and a resonator loss which occur from contact of an exposed surface of the crystal by the viscous, fluid or solid media.

摘要翻译： 公开了一种可用于使用压电晶体产生振荡的振荡器电路，其振荡频率很大程度上与晶体相关的任何分流电容无关（即由于晶体表面上的电极以及由于封装和布线 为晶体）。 振荡器电路基于调谐增益级，其以接近串联谐振频率fS的频率f操作晶体。 振荡器电路还包括补偿电路，其将所有交流电流提供通过与晶体相关联的分流电阻，使得该交流电流不需要由调谐增益级提供。 补偿电路使用电流镜来提供基于通过参考电容器的电流流动的交流电流，其等效于与晶体相关联的分流电容。 振荡器电路具有通过检测晶体的振荡频率的变化以及由粘性流体与晶体的暴露表面的接触而发生的谐振器损耗来驱动用于感测粘性，流体或固体介质的压电晶体的应用 或固体介质。

公开(公告)号：US06606007B1

公开(公告)日：2003-08-12

申请号：US09919222

申请日：2001-07-31

申请人： Clyde Washburn

发明人： Clyde Washburn

IPC分类号： H03B532

CPC分类号： H03B5/36

摘要： A circuit and method are disclosed herein for a crystal oscillator, wherein the Q of the resonant network is not reduced through the loading effects of the oscillator's resistive bias network. The oscillator is configured as an operational transconductance amplifier (OTA) coupled to the resonant network. The OTA creates a negative resistance, which compensates for energy lost to resistance within the resonant network, thereby sustaining oscillation at the resonant frequency. Instead of using bias resistors to set and maintain the operating point of the oscillator, another OTA (with a high output impedance) injects a current into the resonant network to bias the oscillator. Advantageously, this technique avoids the reduction in Q that occurs when bias resistors are connected across the high effective parallel resistance of the resonant crystal. The higher Q benefits frequency stability and phase jitter characteristics of the oscillator.

摘要翻译： 本文公开了一种用于晶体振荡器的电路和方法，其中谐振网络的Q不通过振荡器的电阻偏置网络的负载效应而减小。 振荡器被配置为耦合到谐振网络的工作跨导放大器（OTA）。 OTA产生负电阻，其补偿在谐振网络内的电阻损失，从而在谐振频率下维持振荡。 代替使用偏置电阻来设置和保持振荡器的工作点，另一个OTA（具有高输出阻抗）将注入电流到谐振网络中以偏置振荡器。 有利的是，这种技术避免了当偏置电阻跨越谐振晶体的高有效并联电阻连接时发生的Q的减小。 较高的Q优点是振荡器的频率稳定性和相位抖动特性。

公开(公告)号：US06559728B1

公开(公告)日：2003-05-06

申请号：US10025726

申请日：2001-12-19

申请人： Steven J. Fry

发明人： Steven J. Fry

IPC分类号： H03B532

CPC分类号： H03L1/04 ,  H05K1/0212 ,  H05K1/0237 ,  H05K1/141 ,  H05K3/321

摘要： A miniature ovenized crystal oscillator has a ceramic case that has a cavity, a bottom and a ledge that extends into the cavity. The case has several circuit lines. A substrate is located in the cavity and is supported by the ledge. The substrate has a top and bottom surface and several circuit lines. A crystal is mounted to the bottom surface of the substrate and is connected to the substrate circuit lines. A signal conditioning circuit is mounted to the top surface of the substrate and is connected to the substrate circuit lines. The case circuit lines are connected to the substrate circuit lines by a conductive epoxy. A heater is mounted to the bottom of the ceramic case. A thermal adhesive is located between the heater and the crystal. The thermal adhesive thermally links the crystal and the heater.

摘要翻译： 微型加热晶体振荡器具有陶瓷壳体，其具有延伸到腔体中的空腔，底部和凸缘。 这种情况有几条电路线。 衬底位于腔中并由凸缘支撑。 衬底具有顶表面和底表面以及几条电路线。 晶体被安装到基板的底表面并连接到基板电路线。 信号调理电路安装到基板的顶表面并连接到基板电路线。 壳体电路线通过导电环氧树脂连接到衬底电路线。 加热器安装在陶瓷外壳的底部。 热粘合剂位于加热器和晶体之间。 热粘合剂热连接晶体和加热器。

公开(公告)号：US06556092B1

公开(公告)日：2003-04-29

申请号：US09627814

申请日：2000-07-28

申请人： Richard Ferrant

发明人： Richard Ferrant

IPC分类号： H03B532

CPC分类号： H03K3/012 ,  H03K3/0307

摘要： A low consumption oscillator having an inverter connected to a high supply potential and to a low supply potential via two respective resistors, with the resistors formed of capacitors having strong leakages.

摘要翻译： 低功耗振荡器，其具有通过两个相应的电阻器连接到高电源电位和低电源电压的反相器，电阻器由具有强泄漏的电容器形成。

公开(公告)号：US06362700B1

公开(公告)日：2002-03-26

申请号：US09670477

申请日：2000-09-26

申请人： Steven J. Fry

发明人： Steven J. Fry

IPC分类号： H03B532

CPC分类号： H03L1/023 ,  H03B5/04 ,  H03L1/022 ,  H03L1/028 ,  H03L1/04

摘要： A temperature compensated crystal oscillator using an AT cut crystal produces a reference frequency. The temperature compensated crystal oscillator is located inside a temperature controlled oven. The temperature controlled oven provides a stable temperature to the temperature compensated crystal oscillator such that deviations from the reference frequency are reduced.

摘要翻译： 使用AT切割晶体的温度补偿晶体振荡器产生参考频率。 温度补偿晶体振荡器位于温度控制炉内。 温度控制炉为温度补偿晶体振荡器提供了稳定的温度，从而降低了与参考频率的偏差。

公开(公告)号：US06215370B1

公开(公告)日：2001-04-10

申请号：US09004686

申请日：1998-01-08

申请人： Eiichi Hasegawa ,  Haruhiko Otsuka

发明人： Eiichi Hasegawa ,  Haruhiko Otsuka

IPC分类号： H03B532

CPC分类号： H03K3/0307 ,  H03B5/36 ,  H03K3/012

摘要： A crystal oscillator circuit includes a CMOS invertor having an input terminal and an output terminal, a crystal resonator connected between the input terminal and the output terminal respectively at a first connection node and a second connection node, and a feedback resistor connected between the input terminal and the output terminal of the CMOS invertor. A first capacitor is provided between the first connection node and a power source terminal at a predetermined potential and a second capacitor is provided between the second connection node and a power source terminal at the predetermined potential. At least one resistor is disposed in series with at least one of the first capacitor and the second capacitor and has a resistance so as to limit a crystal current in the crystal resonator while maintaining negative resistance for stable oscillation. In an embodiment, a resistor is provided in series with each capacitor. Furthermore, an embodiment of the invention includes an integrated circuit permitting the above circuit structure with the crystal resonator and first and second capacitors accommodated external of the integrated circuit. Alternatively, the first and second capacitors may be accommodated on the integrated circuit.

摘要翻译： 晶体振荡器电路包括具有输入端子和输出端子的CMOS反相器，分别在第一连接节点和第二连接节点处连接在输入端子和输出端子之间的晶体谐振器，以及连接在输入端子之间的反馈电阻器 和CMOS反相器的输出端子。 在第一连接节点和预定电位的电源端子之间提供第一电容器，并且在第二连接节点和处于预定电位的电源端子之间设置第二电容器。 至少一个电阻器与第一电容器和第二电容器中的至少一个串联布置，并且具有阻抗以限制晶体谐振器中的晶体电流，同时保持用于稳定振荡的负电阻。 在一个实施例中，提供与每个电容器串联的电阻器。 此外，本发明的实施例包括允许具有晶体谐振器的上述电路结构的集成电路，以及容纳在集成电路外部的第一和第二电容器。 或者，第一和第二电容器可以容纳在集成电路上。