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1. 发明授权

US11689158B2 Apparatus for injecting energy into crystal in crystal oscillator, and crystal oscillator 有权
公开(公告)号：US11689158B2
公开(公告)日：2023-06-27
申请号：US17510081
申请日：2021-10-25
申请人： SHENZHEN GOODIX TECHNOLOGY CO., LTD.
发明人： Mengwen Zhang
IPC分类号： H03B5/32 , H03B5/08
CPC分类号： H03B5/32 , H03B5/08 , H03B2200/0094
摘要： Embodiments of the present application provide an apparatus for injecting energy into a crystal in a crystal oscillator, and a crystal oscillator. The apparatus includes: a crystal; a voltage-controlled oscillator configured to output an oscillation signal to the crystal; a ramp voltage generating circuit configured to generate a ramp voltage that changes over time; a first switch disposed between the ramp voltage generating circuit and the voltage-controlled oscillator; a first capacitor, where a first terminal of the first capacitor is connected to the first switch and the voltage-controlled oscillator, and a second terminal of the first capacitor is grounded; and a control circuit configured to control a status of the first switch according to a current through the crystal. Therefore, the apparatus can efficiently inject energy into the crystal.

2. 发明申请

US20190190447A1 FAST START-UP CIRCUIT FOR LOW POWER CRYSTAL OSCILLATOR 审中-公开
公开(公告)号：US20190190447A1
公开(公告)日：2019-06-20
申请号：US15844573
申请日：2017-12-17
申请人： Shraga Kraus , Neil Feldman
发明人： Shraga Kraus , Neil Feldman
IPC分类号： H03B5/06 , H03B5/36
CPC分类号： H03B5/06 , H03B5/364 , H03B2200/0008 , H03B2200/0012 , H03B2200/0094
摘要： A method and apparatus for speeding up the start-up process of a crystal oscillator. The energy required for starting oscillations is inserted to the crystal by a stimulus in the form of a time-variant voltage or current pattern, either periodic or aperiodic. The stimulus is stopped after a pre-established period, then the oscillator continues to operate in its normal mode and completes the start-up process significantly faster, compared to a start-up process not comprising the above stimulus.

3. 发明授权

US09742354B2 Voltage controlled oscillator with common mode adjustment start-up 有权
公开(公告)号：US09742354B2
公开(公告)日：2017-08-22
申请号：US15341352
申请日：2016-11-02
申请人： Microsemi Solutions (U.S.), Inc.
发明人： Hormoz Djahanshahi , Kenneth Allan Townsend
IPC分类号： H03B5/04 , H03B5/06 , H03B5/12 , H03L1/00 , H03L3/00 , H03L5/00 , H03L7/099 , H03K3/03
CPC分类号： H03B5/1293 , H03B5/04 , H03B5/06 , H03B5/1212 , H03B5/1228 , H03B5/1234 , H03B5/124 , H03B5/1278 , H03B5/129 , H03B2200/0094 , H03K3/0315 , H03L1/00 , H03L3/00 , H03L5/00 , H03L7/099
摘要： The present disclosure provides methods and apparatus for dynamically adjusting the common mode voltage at the LC tank node and/or the power supply voltage of a VCO with an LC resonator in order to force oscillation start-up by temporarily increasing gain. Methods according to certain preferred embodiments may reduce power consumption and/or overcome threshold voltage limitations and/or increase frequency and frequency tuning range during normal (steady-state) operation.

4. 发明申请

US20170237441A1 Oscillator Circuit with Bias Current Generator 审中-公开
公开(公告)号：US20170237441A1
公开(公告)日：2017-08-17
申请号：US15314843
申请日：2014-06-02
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Janne Peltonen , Christian Elgaard , Anna-Karin Stenman
IPC分类号： H03L3/00 , H03B5/32
CPC分类号： H03L3/00 , H03B5/32 , H03B2200/0012 , H03B2200/0062 , H03B2200/0066 , H03B2200/0082 , H03B2200/0094 , H03L5/00
摘要： An oscillator circuit (100) comprises a crystal oscillator (10) arranged to generate an oscillation signal, a bias current generator (20) arranged to supply a bias current to the crystal oscillator (10), and a feedback stage (30) arranged to generate a feedback signal in response to an amplitude of the oscillation signal reaching an amplitude threshold. The bias current generator (20) is arranged to: in response to a supply of power to the oscillator circuit (100) being switched on, generate the bias current at an increasing level commencing from a first level; in response to the feedback signal, terminate the increasing; and during subsequent oscillation of the crystal oscillator (10), supply the bias current at a second level dependent on a final level of the bias current reached when the increasing is terminated.

5. 发明申请

US20170054413A1 VOLTAGE CONTROLLED OSCILLATOR WITH COMMON MODE ADJUSTMENT START-UP 有权
标题翻译：电压控制振荡器，具有通用模式调整启动
公开(公告)号：US20170054413A1
公开(公告)日：2017-02-23
申请号：US15341352
申请日：2016-11-02
申请人： Microsemi Storage Solutions (U.S.), Inc.
发明人： Hormoz DJAHANSHAHI , Kenneth Allan TOWNSEND
IPC分类号： H03B5/12 , H03B5/04 , H03L3/00 , H03K3/03
CPC分类号： H03B5/1293 , H03B5/04 , H03B5/06 , H03B5/1212 , H03B5/1228 , H03B5/1234 , H03B5/124 , H03B5/1278 , H03B5/129 , H03B2200/0094 , H03K3/0315 , H03L1/00 , H03L3/00 , H03L5/00 , H03L7/099
摘要： The present disclosure provides methods and apparatus for dynamically adjusting the common mode voltage at the LC tank node and/or the power supply voltage of a VCO with an LC resonator in order to force oscillation start-up by temporarily increasing gain. Methods according to certain preferred embodiments may reduce power consumption and/or overcome threshold voltage limitations and/or increase frequency and frequency tuning range during normal (steady-state) operation.
摘要翻译：本公开提供用于动态地调节LC槽节点处的共模电压和/或具有LC谐振器的VCO的电源电压以便通过暂时增加增益来迫使振荡启动的方法和装置。根据某些优选实施例的方法可以在正常（稳态）操作期间降低功耗和/或克服阈值电压限制和/或增加频率和频率调谐范围。

6. 发明授权

US09160344B2 Reliable crystal oscillator start-up 有权
标题翻译：可靠的晶体振荡器启动
公开(公告)号：US09160344B2
公开(公告)日：2015-10-13
申请号：US14611112
申请日：2015-01-30
申请人： u-blox AG
发明人： Carmine d'Alessandro
IPC分类号： H03B5/32 , H03L3/00 , H03B5/36
CPC分类号： H03L3/00 , H03B5/32 , H03B5/36 , H03B2200/0082 , H03B2200/0094 , H03L7/099
摘要： The method concerns the reliable start-up of a crystal oscillator where the drive levels the crystal is subjected to are kept low in order to avoid over-driving the crystal. After applying a start-up value of a parameter controlling the drive level where the drive level associated with the start-up value is rather high such that reliable start-up is ensured the parameter is modified step-wise so as to reduce the drive level until the crystal oscillator ceases to operate regularly. To assess whether this is the case, the frequency of the crystal oscillator is compared with the frequency of an auxiliary oscillator. A safety margin is added to the parameter and the result stored in a non-volatile memory as an operating value. The crystal oscillator is then restarted with the start-up value and after a delay the operating value is applied.
摘要翻译：该方法涉及晶体振荡器的可靠启动，其中晶体受到的驱动电平保持较低，以避免过度驱动晶体。在应用控制与启动值相关联的驱动电平相当高的驱动电平的参数的启动值之后，确保可靠的启动，该参数被逐步修改以便降低驱动电平直到晶体振荡器停止定期运行。为了评估是否是这种情况，将晶体振荡器的频率与辅助振荡器的频率进行比较。将安全余量添加到参数中，将结果存储在非易失性存储器中作为运行值。然后以启动值重新启动晶体振荡器，并在延迟后施加工作值。

7. 发明授权

US09054637B1 Amplitude limiting circuit for a crystal oscillator 有权
标题翻译：晶振振幅限幅电路
公开(公告)号：US09054637B1
公开(公告)日：2015-06-09
申请号：US14152523
申请日：2014-01-10
申请人： STMicroelectronics International N.V.
发明人： Gauri Mittal , Kallol Chatterjee
IPC分类号： H03B5/36 , H03B5/04 , H03B5/06
CPC分类号： H03B5/364 , H03B5/04 , H03B5/06 , H03B2200/0012 , H03B2200/0038 , H03B2200/0066 , H03B2200/0094
摘要： An amplitude limiting circuit for a crystal oscillator circuit includes a current source configured to supply drive current to the crystal oscillator circuit and a current sensing circuit configured to sense operating current in an inverting transistor of the crystal oscillator circuit. The current comparison circuit functions to compare the sensed operating current to at least a reference current and generate an output signal. A current control circuit generates a control signal for controlling operation of the current source in response to the output signal.
摘要翻译：晶体振荡器电路的振幅限制电路包括被配置为向晶体振荡器电路提供驱动电流的电流源和被配置为感测晶体振荡器电路的反相晶体管中的工作电流的电流感测电路。当前比较电路用于将感测的工作电流与至少参考电流进行比较，并产生输出信号。电流控制电路响应于输出信号产生用于控制电流源的操作的控制信号。

8. 发明授权

US08957738B1 Voltage controlled oscillator 有权
标题翻译：压控振荡器
公开(公告)号：US08957738B1
公开(公告)日：2015-02-17
申请号：US13654846
申请日：2012-10-18
申请人： Hittite Microwave Corporation
发明人： Michael Koechlin , John Chiesa , Christopher O'Neill , Ekrem Oran , John Poelker , Cemin Zhang
IPC分类号： H03B5/12 , H03L7/00
CPC分类号： H03B5/1203 , H03B5/1218 , H03B5/1231 , H03B5/1243 , H03B5/1293 , H03B2200/0008 , H03B2200/009 , H03B2200/0094 , H03B2201/0208
摘要： A voltage controlled oscillator including an RF output terminal and a DC control terminal, an active circuit, and a resonant circuit interconnected with the active circuit and including a plurality of series resonators each having an electrically variable capacitance and fixed inductor; the active circuit includes at least one transistor having an operating current density which is approximately 35% or less of the peak fT operating current density and/or the active circuit includes a multi-transistor bank disposed in at least two separate sections, each pair of sections spaced apart to provide improved thermal uniformity among the transistors without substantially increasing parasitic impedance among them for providing an improved lower phase noise output at said RF output terminal.
摘要翻译：包括RF输出端子和DC控制端子的压控振荡器，有源电路和与有源电路互连的谐振电路，并且包括多个串联谐振器，每个具有电可变电容和固定电感器; 有源电路包括至少一个晶体管，其工作电流密度约为峰值fT工作电流密度的大约35％或更小，和/或有源电路包括设置在至少两个分开的部分中的多晶体管组，每对部分间隔开以提供晶体管之间的改善的热均匀性，而基本上不增加它们之间的寄生阻抗，以在所述RF输出端子处提供改进的较低相位噪声输出。

9. 发明授权

US08816786B2 Method and apparatus of a crystal oscillator with a noiseless and amplitude based start up control loop 有权
标题翻译：具有无噪声和振幅的启动控制回路的晶体振荡器的方法和装置
公开(公告)号：US08816786B2
公开(公告)日：2014-08-26
申请号：US13632173
申请日：2012-10-01
申请人： Tensorcom, Inc.
发明人： KhongMeng Tham
IPC分类号： H03L5/00 , H03B5/36
CPC分类号： H03B5/364 , H03B5/06 , H03B2200/0088 , H03B2200/0094 , H03B2201/031 , H03L5/00
摘要： A large gain is used to start up the oscillation of the crystal quickly. Once the oscillation starts, the amplitude is detected. A control circuit determines based on the measured amplitude to disable a low resistance path in the controlled switch array to reduce the applied gain below the power dissipation specification of the crystal. Another technique introduces a mixed-signal controlled power supply multi-path resistive array which tailors the maximum current to the crystal. A successive approximation register converts the amplitude into several partitions and enables/disables one of several power routing paths to the inverter of the oscillator. This allows a better match between the crystal selected by the customer and the on-chip drive circuitry to power up the oscillator without stressing the crystal. The “l/f” noise of the oscillator circuit is minimized by operating transistors in the triode region instead of the linear region.
摘要翻译：使用大的增益快速启动晶体振荡。一旦振荡开始，就检测振幅。控制电路基于测量的幅度来确定禁用受控开关阵列中的低电阻路径，以将施加的增益降低到低于晶体的功率耗散规格。另一种技术引入了一种混合信号控制电源多路径电阻阵列，可以调整晶体的最大电流。逐次逼近寄存器将振幅转换成几个分区，并使能/禁用振荡器的反相器的几个电源路由路径之一。这允许由客户选择的晶体和片上驱动电路之间更好地匹配，以在不强调晶体的情况下加电振荡器。通过在三极管区域中操作晶体管而不是线性区域来使振荡器电路的“l / f”噪声最小化。

10. 发明申请

US20120154066A1 OSCILLATOR, AND CLOCK GENERATOR, SEMICONDUCTOR DEVICE, AND ELECTRONIC DEVICE INCLUDING THE SAME 有权
标题翻译：振荡器和时钟发生器，半导体器件和包括其的电子器件
公开(公告)号：US20120154066A1
公开(公告)日：2012-06-21
申请号：US13328046
申请日：2011-12-16
申请人： Shinichi KUBOTA
发明人： Shinichi KUBOTA
IPC分类号： H03B5/36
CPC分类号： H03B5/364 , H03B5/06 , H03B2200/0012 , H03B2200/0062 , H03B2200/0082 , H03B2200/0094 , H03L5/00
摘要： An oscillator includes a reference voltage generator, an oscillation element configured to oscillate by either a drive voltage or a drive current and output an oscillation signal, a peak hold element configured to detect a peak level of the oscillation signal for output; and a controller configured to increase or decrease the drive voltage or drive current in accordance with the reference voltage generated by the reference voltage generator and the peak level output from the peak hold element.
摘要翻译：振荡器包括参考电压发生器，被配置为通过驱动电压或驱动电流振荡并输出振荡信号的振荡元件，配置成检测振荡信号的峰值电平以输出的峰值保持元件; 以及控制器，被配置为根据由参考电压发生器产生的参考电压和从峰值保持元件输出的峰值电平来增大或减小驱动电压或驱动电流。

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