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1.发明授权Method and apparatus for providing a modified temperature compensation signal in a TCXO circuit 失效用于在TCXO电路中提供修改的温度补偿信号的方法和装置
公开(公告)号：US5428319A
公开(公告)日：1995-06-27
申请号：US158548
申请日：1993-11-29
摘要： A modified temperature compensation signal (110) is provided in a temperature compensated crystal oscillator (TCXO) circuit (100) in the following manner. A temperature dependent current generator (104) produces a temperature compensation signal (108) whose amplitude changes responsive to changes in ambient temperature. The temperature compensation signal (108) is scaled, based on a plurality of discrete frequency adjust values (212), to produce the modified temperature compensation signal (110).
摘要翻译： 在温度补偿晶体振荡器（TCXO）电路（100）中以下列方式提供改进的温度补偿信号（110）。 温度依赖电流发生器（104）产生温度补偿信号（108），其温度响应于环境温度的变化而变化。 基于多个离散频率调整值（212）对温度补偿信号（108）进行缩放，以产生修改的温度补偿信号（110）。
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2.发明授权
公开(公告)号：US4658223A
公开(公告)日：1987-04-14
申请号：US688085
申请日：1984-12-31
申请人： Dennis F. Marvin , Roger Steele
发明人： Dennis F. Marvin , Roger Steele
CPC分类号： H03L1/028 , H03B5/362 , H03B2200/0008
摘要： A method within adjusting values of a passive temperature compensation network for use in an oscillator includes the steps of determining the frequency variation of the oscillator from nominal over a specified temperature range, determining the maximum frequency variation over the temperature range, and recalculating the performance of the circuit over the temperature range utilizing reduced values for the temperature compensation components therein. The oscillation frequency can be utilized as the controlled parameter to a laser based component trimming system. Power is applied to the oscillator and the compensation component is trimmed until the circuit oscillates at the specified target frequency.
摘要翻译： 调整用于振荡器的被动温度补偿网络值的方法包括以下步骤：确定振荡器在规定温度范围内的标称频率变化，确定温度范围内的最大频率变化，并重新计算振荡器的性能 该温度范围内的电路利用其中的温度补偿部件的减小的值。 振荡频率可以用作基于激光的组件修整系统的受控参数。 电源被施加到振荡器，补偿元件被修整，直到电路以指定的目标频率振荡。
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公开(公告)号：US5180942A
公开(公告)日：1993-01-19
申请号：US835792
申请日：1992-02-14
CPC分类号： H03H9/08 , H05K1/0201 , H05K2201/062 , H05K2201/09063 , H05K2201/10083
摘要： Heat-generating ovenized crystal oscillators can be directly mounted to a circuit board. Thermal isolation of an OCO from heat-sinking circuit board material and other temperature-sensitive components on a circuit board is accomplished by means of perforations (12) in the circuit board that surround the mounting area of the OCO on the board.
摘要翻译： 产生热量的晶体振荡器可以直接安装在电路板上。 散热电路板材料和电路板上的其他温度敏感元件的OCO热隔离是通过电路板中穿过板上OCO安装区域的穿孔（12）实现的。
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4.发明授权Electronic switch with static control voltage for dynamically switching capacitance in a frequency-adjustable crystal oscillator 失效具有静态控制电压的电子开关，可在频率可调的晶体振荡器中动态切换电容公开(公告)号：US06559730B1
公开(公告)日：2003-05-06
申请号：US09609356
申请日：2000-07-05
IPC分类号： H03B532
CPC分类号： H03B5/366 , H03J2200/10
摘要： A controllable crystal oscillator includes a crystal resonator having first and second electrodes, a gain stage having first and second terminals connected to the first and second electrodes for starting and maintaining the oscillation, first and second capacitor banks connected to the first and second terminals for providing a capacitive load to the resonator, and first and second dynamic switches interconnected between the terminals and the respective capacitor banks for cycling the capacitor banks in and out of connection.
摘要翻译： 可控晶体振荡器包括具有第一和第二电极的晶体谐振器，增益级，其具有连接到第一和第二电极的第一和第二端子，用于启动和保持振荡，第一和第二电容器组连接到第一和第二端子，用于提供 耦合到谐振器的电容性负载，以及在端子和相应的电容器组之间互连的第一和第二动态开关，用于使电容器组循环和连接。
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公开(公告)号：US5481229A
公开(公告)日：1996-01-02
申请号：US346452
申请日：1994-11-29
申请人： Lawrence E. Connell , Timothy J. Collins , Anthony F. Keller , Dennis F. Marvin , Michael L. Bushman
发明人： Lawrence E. Connell , Timothy J. Collins , Anthony F. Keller , Dennis F. Marvin , Michael L. Bushman
CPC分类号： H03L1/023
摘要： A temperature compensated crystal oscillator (10), has a crystal oscillator circuit (12), a voltage controlled reactance element (30), a temperature compensation network (50), and a programmable DC-DC converter network (60) having an output (62) connected to the voltage controlled reactance element (30), or the temperature compensation network (50) or both. The DC-DC converter network (60) provides the capability of operating over an extended voltage range, by increasing the supply voltage to a level necessary to operate the voltage controlled reactance element (30). Much of this structure is adapted for use in an integrated circuit, and provides the advantages of minimizing power and current consumption.
摘要翻译： 温度补偿晶体振荡器（10）具有晶体振荡器电路（12），压控电抗元件（30），温度补偿网络（50）和可编程DC-DC转换器网络（60） 连接到电压控制电抗元件（30）或温度补偿网络（50）或两者。 DC-DC转换器网络（60）通过将电源电压增加到操作电压控制电抗元件（30）所需的电平来提供在扩展电压范围上工作的能力。 这种结构中的大部分适用于集成电路，并且提供最小化功率和电流消耗的优点。
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公开(公告)号：US4587497A
公开(公告)日：1986-05-06
申请号：US685424
申请日：1984-12-24
CPC分类号： H03B5/32 , H03B2200/0012
摘要： A low current oscillator/buffer amplifier configuration is disclosed which provides a simple, inexpensive, low power oscillator with reduced harmonic output. Buffer 60 is coupled to the resonant tank circuit 58 of oscillator 50 by means of impedance transform network 70. This technique of tapping directly from the tank provides a buffered output signal having low harmonic content. Furthermore, impedance transform network 70 permits coupling feedback amplifier 52 to buffer amplifier 62 in a totem-pole amplifier stage configuration. This feature provides a significant current savings over conventional oscillator/buffer circuits. The instant invention is particularly well adapted for use as reference frequency oscillators in portable radio applications.
摘要翻译： 公开了一种低电流振荡器/缓冲放大器配置，其提供具有减少的谐波输出的简单，便宜的低功率振荡器。 缓冲器60通过阻抗变换网络70耦合到振荡器50的谐振回路58.这种直接从储罐提供的技术提供具有低谐波含量的缓冲输出信号。 此外，阻抗变换网络70允许以图腾柱放大器级配置将反馈放大器52耦合到缓冲放大器62。 与传统的振荡器/缓冲电路相比，该功能节省了大量的电流。 本发明特别适用于便携式无线电应用中的参考频率振荡器。
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