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    • 1. 发明申请
    • Phase-Locked Loop with Start-Up Circuit
    • 带启动电路的锁相环
    • US20100141346A1
    • 2010-06-10
    • US12330952
    • 2008-12-09
    • Chien-Hung ChenMao-Hsuan ChouTsung-Hsien TsaiMin-Shuch Yuan
    • Chien-Hung ChenMao-Hsuan ChouTsung-Hsien TsaiMin-Shuch Yuan
    • H03L7/00H03L7/06
    • H03L7/10H03L7/0995
    • A circuit includes a voltage-controlled oscillator (VCO), which includes a voltage input node having an input voltage; and a start-up circuit. The start-up circuit includes a first current path and a second current path. The first current path has a first current and is configured so that the first current increases in response to a decrease in the input voltage and decreases in response to an increase in the input voltage. The second current path has a second current and is configured so that the second current decreases in response to the decrease in the input voltage and decreases in response to the increase in the input voltage. The VCO further includes a third current path combining a first proportion of the first current and a second proportion of the second current into a combined current; and a current-controlled oscillator (CCO) including an input receiving the combined current and outputting an AC signal.
    • 电路包括压控振荡器(VCO),其包括具有输入电压的电压输入节点; 和启动电路。 启动电路包括第一电流路径和第二电流路径。 第一电流路径具有第一电流并且被配置为使得第一电流响应于输入电压的降低而增加,并且响应于输入电压的增加而减小。 第二电流路径具有第二电流并且被配置为使得第二电流响应于输入电压的降低而减小,并且响应于输入电压的增加而减小。 VCO还包括将第一电流的第一比例和第二电流的第二比例组合成组合电流的第三电流通路; 以及电流控制振荡器(CCO),其包括接收组合电流的输入并输出AC信号。
    • 2. 发明授权
    • Phase-locked loop with start-up circuit
    • 带启动电路的锁相环
    • US07791420B2
    • 2010-09-07
    • US12330952
    • 2008-12-09
    • Chien-Hung ChenMao-Hsuan ChouTsung-Hsien TsaiMin-Shueh Yuan
    • Chien-Hung ChenMao-Hsuan ChouTsung-Hsien TsaiMin-Shueh Yuan
    • H03K3/03H03L7/099
    • H03L7/10H03L7/0995
    • A circuit includes a voltage-controlled oscillator (VCO), which includes a voltage input node having an input voltage; and a start-up circuit. The start-up circuit includes a first current path and a second current path. The first current path has a first current and is configured so that the first current increases in response to a decrease in the input voltage and decreases in response to an increase in the input voltage. The second current path has a second current and is configured so that the second current decreases in response to the decrease in the input voltage and decreases in response to the increase in the input voltage. The VCO further includes a third current path combining a first proportion of the first current and a second proportion of the second current into a combined current; and a current-controlled oscillator (CCO) including an input receiving the combined current and outputting an AC signal.
    • 电路包括压控振荡器(VCO),其包括具有输入电压的电压输入节点; 和启动电路。 启动电路包括第一电流路径和第二电流路径。 第一电流路径具有第一电流并且被配置为使得第一电流响应于输入电压的降低而增加,并且响应于输入电压的增加而减小。 第二电流路径具有第二电流并且被配置为使得第二电流响应于输入电压的降低而减小,并且响应于输入电压的增加而减小。 VCO还包括将第一电流的第一比例和第二电流的第二比例组合成组合电流的第三电流通路; 以及电流控制振荡器(CCO),其包括接收组合电流的输入并输出AC信号。
    • 6. 发明授权
    • Constant Gm circuit and methods
    • 恒定电路和方法
    • US08183914B2
    • 2012-05-22
    • US12617583
    • 2009-11-12
    • Tsung-Hsien TsaiChien-Hung ChenMin-Shueh Yuan
    • Tsung-Hsien TsaiChien-Hung ChenMin-Shueh Yuan
    • G05F1/575G05F1/567
    • G05F3/242
    • Structures and methods for providing a temperature independent constant current reference are provided. A constant Gm circuit is disclosed with embodiments including a voltage controlled resistor providing a current into a current mirror, the current mirror sinking a reference current at its output. By providing a feedback loop that controls the voltage controlled resistor, a temperature compensated circuit may be obtained. The temperature dependence of the voltage controlled resistor is positive and the feedback circuitry maintains this resistor at a value that compensates for the negative temperature dependence of the current mirror circuit. The reference current is thus obtained at a predetermined level independent of temperature. A method for providing a reference current is disclosed wherein a voltage dependent resistor is provided supply current to a current mirror, the voltage dependent resistor receiving a feedback voltage from the current mirror and the feedback controlling the resistor so that a temperature independent reference current is obtained.
    • 提供了提供独立于温度的恒流基准的结构和方法。 公开了一种恒定的Gm电路,其实施例包括向电流镜提供电流的电压控制电阻器,电流镜在其输出端吸收参考电流。 通过提供控制压控电阻器的反馈回路,可以获得温度补偿电路。 电压控制电阻的温度依赖性为正,并且反馈电路将该电阻保持在补偿电流镜电路的负温度依赖性的值。 因此,在与温度无关的预定水平上获得参考电流。 公开了一种用于提供参考电流的方法,其中提供电压依赖电阻器供应电流到电流镜,电压相关电阻器接收来自电流镜的反馈电压和控制电阻器的反馈,使得获得与温度无关的参考电流 。
    • 7. 发明申请
    • Constant Gm Circuit and Methods
    • 恒定电路和方法
    • US20100176777A1
    • 2010-07-15
    • US12617583
    • 2009-11-12
    • Tsung-Hsien TsaiChien-Hung ChenMin-Shueh Yuan
    • Tsung-Hsien TsaiChien-Hung ChenMin-Shueh Yuan
    • G05F1/10
    • G05F3/242
    • Structures and methods for providing a temperature independent constant current reference are provided. A constant Gm circuit is disclosed with embodiments including a voltage controlled resistor providing a current into a current mirror, the current mirror sinking a reference current at its output. By providing a feedback loop that controls the voltage controlled resistor, a temperature compensated circuit may be obtained. The temperature dependence of the voltage controlled resistor is positive and the feedback circuitry maintains this resistor at a value that compensates for the negative temperature dependence of the current mirror circuit. The reference current is thus obtained at a predetermined level independent of temperature. A method for providing a reference current is disclosed wherein a voltage dependent resistor is provided supply current to a current mirror, the voltage dependent resistor receiving a feedback voltage from the current mirror and the feedback controlling the resistor so that a temperature independent reference current is obtained.
    • 提供了提供独立于温度的恒流基准的结构和方法。 公开了一种恒定的Gm电路,其实施例包括向电流镜提供电流的电压控制电阻器,电流镜在其输出端吸收参考电流。 通过提供控制压控电阻器的反馈回路,可以获得温度补偿电路。 电压控制电阻的温度依赖性为正,并且反馈电路将该电阻保持在补偿电流镜电路的负温度依赖性的值。 因此,在与温度无关的预定水平上获得参考电流。 公开了一种用于提供参考电流的方法,其中提供电压依赖电阻器供应电流到电流镜,电压相关电阻器接收来自电流镜的反馈电压和控制电阻器的反馈,使得获得与温度无关的参考电流 。
    • 8. 发明申请
    • Phase Lock Loop (PLL) with Gain Control
    • 锁相环(PLL),具有增益控制
    • US20090295439A1
    • 2009-12-03
    • US12127651
    • 2008-05-27
    • Tsung-Hsien TsaiTsung-Yang HungChien-Hung ChenMin-Shueh Yuan
    • Tsung-Hsien TsaiTsung-Yang HungChien-Hung ChenMin-Shueh Yuan
    • H03L7/093
    • H03L7/093H03L7/0995H03L7/10H03L2207/06
    • A Phase Lock Loop (PLL) with gain control is provided. The PLL has a dual-path configuration, where a first and a second VCO control voltage are generated in response to a phase or frequency difference between a PLL input signal and an output signal. The PLL comprises a dynamic voltage gain control (DVGC) unit and a voltage-to-current (V2I) unit, where the DVGC creates a baseline reference current in response to the first VCO control voltage and the V2I provides a substantially linear current in response to the second VCO control voltage. The currents from the DVGC and V2I are combined and fed into a current-controlled oscillator, which generates a PLL output frequency signal. Frequency gain of the VCO is substantially reduced, thus providing a PLL with improved tuning precision.
    • 提供了具有增益控制的锁相环(PLL)。 PLL具有双路配置,其中响应于PLL输入信号和输出信号之间的相位或频率差产生第一和第二VCO控制电压。 PLL包括动态电压增益控制(DVGC)单元和电压 - 电流(V2I)单元,其中DVGC响应于第一VCO控制电压创建基准参考电流,并且V2I提供基本上线性的电流响应 到第二个VCO控制电压。 来自DVGC和V2I的电流被组合并馈送到电流控制的振荡器中,其产生PLL输出频率信号。 VCO的频率增益显着降低,从而提供具有改进的调谐精度的PLL。
    • 9. 发明授权
    • Phase lock loop (PLL) with gain control
    • 具有增益控制的锁相环(PLL)
    • US07786771B2
    • 2010-08-31
    • US12127651
    • 2008-05-27
    • Tsung-Hsien TsaiTsung-Yang HungChien-Hung ChenMin-Shueh Yuan
    • Tsung-Hsien TsaiTsung-Yang HungChien-Hung ChenMin-Shueh Yuan
    • H03L7/06
    • H03L7/093H03L7/0995H03L7/10H03L2207/06
    • A Phase Lock Loop (PLL) with gain control is provided. The PLL has a dual-path configuration, where a first and a second VCO control voltage are generated in response to a phase or frequency difference between a PLL input signal and an output signal. The PLL comprises a dynamic voltage gain control (DVGC) unit and a voltage-to-current (V2I) unit, where the DVGC creates a baseline reference current in response to the first VCO control voltage and the V2I provides a substantially linear current in response to the second VCO control voltage. The currents from the DVGC and V2I are combined and fed into a current-controlled oscillator, which generates a PLL output frequency signal. Frequency gain of the VCO is substantially reduced, thus providing a PLL with improved tuning precision.
    • 提供了具有增益控制的锁相环(PLL)。 PLL具有双路配置,其中响应于PLL输入信号和输出信号之间的相位或频率差产生第一和第二VCO控制电压。 PLL包括动态电压增益控制(DVGC)单元和电压 - 电流(V2I)单元,其中DVGC响应于第一VCO控制电压创建基准参考电流,并且V2I提供基本上线性的电流响应 到第二个VCO控制电压。 来自DVGC和V2I的电流被组合并馈送到电流控制的振荡器中,其产生PLL输出频率信号。 VCO的频率增益显着降低,从而提供具有改进的调谐精度的PLL。