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    • 1. 发明授权
    • System and method for crystal oscillator frequency tuning
    • 晶体振荡器频率调谐的系统和方法
    • US08138844B1
    • 2012-03-20
    • US12879525
    • 2010-09-10
    • John SimmonsKristopher Kaufman
    • John SimmonsKristopher Kaufman
    • H03B5/32
    • H03K3/017H03B5/366H03B2200/0012H03B2200/005H03J2200/10H03K3/0307
    • An oscillator may include a crystal resonator, an inverter coupled in parallel with the crystal resonator, a first switched capacitor coupled to a first terminal of the crystal resonator, a second switched capacitor coupled to a second terminal of the crystal resonator, a control module configured to output a periodic dithering signal, the periodic dithering signal having a first pulse width based on a desired frequency of oscillation for the oscillator, and a delay module configured to communicate a first periodic enable signal to enable the first switched capacitor and a second periodic enable signal to enable the second switched capacitor. At least one of the first periodic enable signal and the second periodic enable signal may have a second pulse width greater than the first pulse width. The second periodic enable signal may be phase delayed relative to the first periodic enable signal by a non-zero delay.
    • 振荡器可以包括晶体谐振器,与晶体谐振器并联耦合的反相器,耦合到晶体谐振器的第一端子的第一开关电容器,耦合到晶体谐振器的第二端子的第二开关电容器,配置成 为了输出周期性抖动信号,所述周期性抖动信号具有基于用于所述振荡器的期望振荡频率的第一脉冲宽度,以及延迟模块,被配置为传送第一周期性使能信号以使得所述第一开关电容器和第二周期性使能 信号以使第二开关电容器。 第一周期使能信号和第二周期使能信号中的至少一个可以具有大于第一脉冲宽度的第二脉冲宽度。 第二周期性使能信号可以相对于第一周期性使能信号相位延迟非零延迟。
    • 2. 发明申请
    • System and Method for Duty Cycle Control of a Crystal Oscillator
    • 晶体振荡器的占空比控制系统与方法
    • US20120046005A1
    • 2012-02-23
    • US12859601
    • 2010-08-19
    • John SimmonsKristopher Kaufman
    • John SimmonsKristopher Kaufman
    • H04B1/04G06F1/04H03M1/60
    • H03L7/00H03K3/0307
    • In accordance with some embodiments of the present disclosure, an oscillator may include a crystal resonator and a squaring circuit coupled to the crystal resonator and configured to convert a sinusoidal signal produced by the crystal resonator to a square-wave signal, the squaring circuit comprising a bias circuit configured to transmit a selected bias voltage for the squaring circuit, the selected bias voltage selected from a plurality of potential bias voltages. In accordance with this and other embodiments of the present disclosure, an oscillator may include a crystal resonator, an inverter coupled in parallel with the crystal resonator, and a programmable voltage regulator coupled to the inverter. The programmable voltage regulator may be configured to supply a first supply voltage to the inverter during a startup duration of the oscillator, and supply a second supply voltage to the inverter after the startup duration, wherein the second supply voltage is lesser than the first supply voltage.
    • 根据本公开的一些实施例,振荡器可以包括晶体谐振器和耦合到晶体谐振器的平方电路,并且被配置为将由晶体谐振器产生的正弦信号转换为方波信号,平方电路包括 偏置电路,被配置为传输用于所述平方电路的所选择的偏置电压,所述偏置电压从多个电位偏置电压中选择。 根据本公开的这个和其他实施例,振荡器可以包括晶体谐振器,与晶体谐振器并联耦合的反相器以及耦合到反相器的可编程电压调节器。 可编程稳压器可以被配置为在振荡器的启动持续时间期间向逆变器提供第一电源电压,并且在启动持续时间之后向逆变器提供第二电源电压,其中第二电源电压小于第一电源电压 。
    • 3. 发明申请
    • SYSTEM AND METHOD FOR CRYSTAL OSCILLATOR FREQUENCY TUNING
    • 晶体振荡器频率调谐的系统与方法
    • US20120063504A1
    • 2012-03-15
    • US12879525
    • 2010-09-10
    • John SimmonsKristopher Kaufman
    • John SimmonsKristopher Kaufman
    • H03K7/08H03K3/017H03L7/00
    • H03K3/017H03B5/366H03B2200/0012H03B2200/005H03J2200/10H03K3/0307
    • An oscillator may include a crystal resonator, an inverter coupled in parallel with the crystal resonator, a first switched capacitor coupled to a first terminal of the crystal resonator, a second switched capacitor coupled to a second terminal of the crystal resonator, a control module configured to output a periodic dithering signal, the periodic dithering signal having a first pulse width based on a desired frequency of oscillation for the oscillator, and a delay module configured to communicate a first periodic enable signal to enable the first switched capacitor and a second periodic enable signal to enable the second switched capacitor. At least one of the first periodic enable signal and the second periodic enable signal may have a second pulse width greater than the first pulse width. The second periodic enable signal may be phase delayed relative to the first periodic enable signal by a non-zero delay.
    • 振荡器可以包括晶体谐振器,与晶体谐振器并联耦合的反相器,耦合到晶体谐振器的第一端子的第一开关电容器,耦合到晶体谐振器的第二端子的第二开关电容器,配置成 为了输出周期性抖动信号,所述周期性抖动信号具有基于用于所述振荡器的期望振荡频率的第一脉冲宽度,以及延迟模块,被配置为传送第一周期性使能信号以使得所述第一开关电容器和第二周期性使能 信号以使第二开关电容器。 第一周期使能信号和第二周期使能信号中的至少一个可以具有大于第一脉冲宽度的第二脉冲宽度。 第二周期性使能信号可以相对于第一周期性使能信号相位延迟非零延迟。
    • 4. 发明申请
    • System and Method for Amplitude Control of a Crystal Oscillator
    • 晶体振荡器幅度控制系统及方法
    • US20120045000A1
    • 2012-02-23
    • US12860447
    • 2010-08-20
    • John SimmonsKristopher Kaufman
    • John SimmonsKristopher Kaufman
    • H04L27/00H03L5/00H03B5/30
    • H03L5/00
    • In accordance with some embodiments of the present disclosure, an oscillator may include a crystal resonator and a squaring circuit coupled to the crystal resonator and configured to convert a sinusoidal signal produced by the crystal resonator to a square-wave signal, the squaring circuit comprising a bias circuit configured to transmit a selected bias voltage for the squaring circuit, the selected bias voltage selected from a plurality of potential bias voltages. In accordance with this and other embodiments of the present disclosure, an oscillator may include a crystal resonator, an inverter coupled in parallel with the crystal resonator, and a programmable voltage regulator coupled to the inverter. The programmable voltage regulator may be configured to supply a first supply voltage to the inverter during a startup duration of the oscillator, and supply a second supply voltage to the inverter after the startup duration, wherein the second supply voltage is lesser than the first supply voltage.
    • 根据本公开的一些实施例,振荡器可以包括晶体谐振器和耦合到晶体谐振器的平方电路,并且被配置为将由晶体谐振器产生的正弦信号转换为方波信号,平方电路包括 偏置电路,被配置为传输用于所述平方电路的所选择的偏置电压,所述偏置电压从多个电位偏置电压中选择。 根据本公开的这个和其他实施例,振荡器可以包括晶体谐振器,与晶体谐振器并联耦合的反相器以及耦合到反相器的可编程电压调节器。 可编程稳压器可以被配置为在振荡器的启动持续时间期间向逆变器提供第一电源电压,并且在启动持续时间之后向逆变器提供第二电源电压,其中第二电源电压小于第一电源电压 。
    • 5. 发明授权
    • System and method for amplitude contorl of a crystal oscillator
    • 晶振振幅控制系统及方法
    • US08593231B2
    • 2013-11-26
    • US12860447
    • 2010-08-20
    • John SimmonsKristopher Kaufman
    • John SimmonsKristopher Kaufman
    • H03B5/32
    • H03L5/00
    • In accordance with some embodiments of the present disclosure, an oscillator may include a crystal resonator and a squaring circuit coupled to the crystal resonator and configured to convert a sinusoidal signal produced by the crystal resonator to a square-wave signal, the squaring circuit comprising a bias circuit configured to transmit a selected bias voltage for the squaring circuit, the selected bias voltage selected from a plurality of potential bias voltages. In accordance with this and other embodiments of the present disclosure, an oscillator may include a crystal resonator, an inverter coupled in parallel with the crystal resonator, and a programmable voltage regulator coupled to the inverter. The programmable voltage regulator may be configured to supply a first supply voltage to the inverter during a startup duration of the oscillator, and supply a second supply voltage to the inverter after the startup duration, wherein the second supply voltage is lesser than the first supply voltage.
    • 根据本公开的一些实施例,振荡器可以包括晶体谐振器和耦合到晶体谐振器的平方电路,并且被配置为将由晶体谐振器产生的正弦信号转换为方波信号,平方电路包括 偏置电路,被配置为传输用于所述平方电路的所选择的偏置电压,所述偏置电压从多个电位偏置电压中选择。 根据本公开的这个和其他实施例,振荡器可以包括晶体谐振器,与晶体谐振器并联耦合的反相器以及耦合到反相器的可编程电压调节器。 可编程稳压器可以被配置为在振荡器的启动持续时间期间向逆变器提供第一电源电压,并且在启动持续时间之后向逆变器提供第二电源电压,其中第二电源电压小于第一电源电压 。
    • 6. 发明授权
    • System and method for duty cycle control of a crystal oscillator
    • 晶体振荡器占空比控制的系统和方法
    • US08559904B2
    • 2013-10-15
    • US12859601
    • 2010-08-19
    • John SimmonsKristopher Kaufman
    • John SimmonsKristopher Kaufman
    • H04B1/06H04B7/00
    • H03L7/00H03K3/0307
    • In accordance with some embodiments of the present disclosure, an oscillator may include a crystal resonator and a squaring circuit coupled to the crystal resonator and configured to convert a sinusoidal signal produced by the crystal resonator to a square-wave signal, the squaring circuit comprising a bias circuit configured to transmit a selected bias voltage for the squaring circuit, the selected bias voltage selected from a plurality of potential bias voltages. In accordance with this and other embodiments of the present disclosure, an oscillator may include a crystal resonator, an inverter coupled in parallel with the crystal resonator, and a programmable voltage regulator coupled to the inverter. The programmable voltage regulator may be configured to supply a first supply voltage to the inverter during a startup duration of the oscillator, and supply a second supply voltage to the inverter after the startup duration, wherein the second supply voltage is lesser than the first supply voltage.
    • 根据本公开的一些实施例,振荡器可以包括晶体谐振器和耦合到晶体谐振器的平方电路,并且被配置为将由晶体谐振器产生的正弦信号转换为方波信号,平方电路包括 偏置电路,被配置为传输用于所述平方电路的所选择的偏置电压,所述偏置电压从多个电位偏置电压中选择。 根据本公开的这个和其他实施例,振荡器可以包括晶体谐振器,与晶体谐振器并联耦合的反相器以及耦合到反相器的可编程电压调节器。 可编程稳压器可以被配置为在振荡器的启动持续时间期间向逆变器提供第一电源电压,并且在启动持续时间之后向逆变器提供第二电源电压,其中第二电源电压小于第一电源电压 。
    • 7. 发明授权
    • System and method for correcting integral nonlinearity in an oscillator system
    • 用于校正振荡器系统中的积分非线性的系统和方法
    • US08855579B2
    • 2014-10-07
    • US13489988
    • 2012-06-06
    • David HarnishfegerKristopher Kaufman
    • David HarnishfegerKristopher Kaufman
    • H04B1/40
    • H04B17/11H03J1/0008H03J2200/05H03J2200/09H04B1/40H04B1/405
    • A method may include measuring a frequency difference between an actual frequency and an expected frequency associated with a frequency control calibration signal value for each of a plurality of frequency control calibration signal values during a calibration phase. The method may additionally include generating integral non-linearity compensation values based on the frequency differences measured The method may further include generating the applied frequency control signal based on a frequency control calibration signal value received by the digital-to-analog converter during the calibration phase. The method may also include generating a compensated frequency control signal value based on a frequency control signal value received by the integral non-linearity compensation module and an integral non-linearity compensation value associated with the frequency control signal value during an operation phase of the wireless communication element.
    • 方法可以包括在校准阶段期间测量与频率控制校准信号值相关联的实际频率和预期频率之间的频率差,所述频率控制校准信号值针对多个频率控制校准信号值中的每一个。 该方法可以另外包括基于测量的频率差产生积分非线性补偿值。该方法还可以包括基于在校准阶段期间由数模转换器接收的频率控制校准信号值来产生施加的频率控制信号 。 该方法还可以包括基于由积分非线性补偿模块接收的频率控制信号值和在无线电的操作阶段期间与频率控制信号值相关联的积分非线性补偿值来生成经补偿的频率控制信号值 通讯元素
    • 8. 发明申请
    • System and Method for Correcting Integral Nonlinearity in an Oscillator System
    • 用于校正振荡器系统中的积分非线性的系统和方法
    • US20130331040A1
    • 2013-12-12
    • US13489988
    • 2012-06-06
    • David HarnishfegerKristopher Kaufman
    • David HarnishfegerKristopher Kaufman
    • H04B1/40
    • H04B17/11H03J1/0008H03J2200/05H03J2200/09H04B1/40H04B1/405
    • A method may include measuring a frequency difference between an actual frequency and an expected frequency associated with a frequency control calibration signal value for each of a plurality of frequency control calibration signal values during a calibration phase. The method may additionally include generating integral non-linearity compensation values based on the frequency differences measured The method may further include generating the applied frequency control signal based on a frequency control calibration signal value received by the digital-to-analog converter during the calibration phase. The method may also include generating a compensated frequency control signal value based on a frequency control signal value received by the integral non-linearity compensation module and an integral non-linearity compensation value associated with the frequency control signal value during an operation phase of the wireless communication element.
    • 方法可以包括在校准阶段期间测量与频率控制校准信号值相关联的实际频率和预期频率之间的频率差,所述频率控制校准信号值针对多个频率控制校准信号值中的每一个。 该方法可以另外包括基于测量的频率差产生积分非线性补偿值。该方法还可以包括基于在校准阶段期间由数模转换器接收的频率控制校准信号值来产生施加的频率控制信号 。 该方法还可以包括基于由积分非线性补偿模块接收的频率控制信号值和在无线电的操作阶段期间与频率控制信号值相关联的积分非线性补偿值来产生补偿的频率控制信号值 通讯元素