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    • 1. 发明授权
    • On die low power high accuracy reference clock generation
    • 低功耗高精度基准时钟生成
    • US08610479B2
    • 2013-12-17
    • US13276269
    • 2011-10-18
    • Kochung LeeQuan YuYuntao ZhuLei XieMing Qu
    • Kochung LeeQuan YuYuntao ZhuLei XieMing Qu
    • G06F1/04
    • H03L7/22
    • A system and method are disclosed for generating a high accuracy and low power on die reference clock. An LC clock is generated on die and a frequency divider lowers the LC clock frequency to a target reference frequency. An RCO clock is generated on die with an unknown initial frequency. The RCO clock and target reference clock are compared to determine in which direction the frequency of the RCO clock should be adjusted to move closer to the target reference frequency. A signal is sent causing a current source or capacitor in the RCO circuit to be modified. Therefore, the RCO clock frequency is adjusted. The RCO circuit is repeatedly adjusted until the RCO clock frequency is sufficiently accurate. The LC clock is disabled to conserve the power that would have been consumed in generating the LC clock.
    • 公开了一种用于在芯片参考时钟上产生高精度和低功耗的系统和方法。 在芯片上产生LC时钟,分频器将LC时钟频率降低到目标参考频率。 在未知的初始频率的芯片上产生RCO时钟。 比较RCO时钟和目标参考时钟,确定在哪个方向上调整RCO时钟的频率以更接近目标参考频率。 发送信号,导致RCO电路中的电流源或电容器被修改。 因此,调整RCO时钟频率。 RCO电路重复调整,直到RCO时钟频率足够准确。 LC时钟被禁用,以节省在生成LC时钟时消耗的功率。
    • 2. 发明申请
    • ON DIE LOW POWER HIGH ACCURACY REFERENCE CLOCK GENERATION
    • ON DIE低功率高精度参考时钟产生
    • US20130093466A1
    • 2013-04-18
    • US13276269
    • 2011-10-18
    • Kochung LeeQuan YuYuntao ZhuLei XieMing Qu
    • Kochung LeeQuan YuYuntao ZhuLei XieMing Qu
    • H03D13/00
    • H03L7/22
    • A system and method are disclosed for generating a high accuracy and low power on die reference clock. An LC clock is generated on die and a frequency divider lowers the LC clock frequency to a target reference frequency. An RCO clock is generated on die with an unknown initial frequency. The RCO clock and target reference clock are compared to determine in which direction the frequency of the RCO clock should be adjusted to move closer to the target reference frequency. A signal is sent causing a current source or capacitor in the RCO circuit to be modified. Therefore, the RCO clock frequency is adjusted. The RCO circuit is repeatedly adjusted until the RCO clock frequency is sufficiently accurate. The LC clock is disabled to conserve the power that would have been consumed in generating the LC clock.
    • 公开了一种用于在芯片参考时钟上产生高精度和低功耗的系统和方法。 在芯片上产生LC时钟,分频器将LC时钟频率降低到目标参考频率。 在未知的初始频率的芯片上产生RCO时钟。 比较RCO时钟和目标参考时钟,确定在哪个方向上调整RCO时钟的频率以更接近目标参考频率。 发送信号,导致RCO电路中的电流源或电容器被修改。 因此,调整RCO时钟频率。 RCO电路重复调整,直到RCO时钟频率足够准确。 LC时钟被禁用,以节省在生成LC时钟时消耗的功率。
    • 7. 发明授权
    • On-chip resistor calibration for line termination
    • 用于线路端接的片上电阻校准
    • US07382153B2
    • 2008-06-03
    • US11459880
    • 2006-07-25
    • Quing Ou-yangQuan YuMing Qu
    • Quing Ou-yangQuan YuMing Qu
    • H03K17/16
    • H03K19/0005
    • A circuit for calibrating a resistance value on an integrated circuit includes a resistor network, a reference voltage generator, a comparator, a servo loop, and a shift register. The resistor network includes a plurality of resistor and switch pairs in parallel. The resistor network further includes a servo resistor in series with a servo resistor switch such that the servo resistor and servo resistor switch are in parallel with the plurality of resistor and switch pairs. The servo loop generates a shift register gating signal and includes a current sample register for storing a current comparator output data value and a previous sample register for storing a previous comparator output data value. The shift register, upon receipt of a shift register gating signal at a first state, inputs the current comparator output data value to shift data bits through the shift register.
    • 用于校准集成电路上的电阻值的电路包括电阻网络,参考电压发生器,比较器,伺服环路和移位寄存器。 电阻网络包括并联的多个电阻器和开关对。 电阻网络还包括与伺服电阻器开关串联的伺服电阻器,使得伺服电阻器和伺服电阻器开关与多个电阻器和开关对并联。 伺服环路产生移位寄存器门控信号,并包括用于存储当前比较器输出数据值的当前采样寄存器和用于存储先前比较器输出数据值的先前采样寄存器。 移位寄存器在第一状态下接收到移位寄存器选通信号时,输入当前比较器输出数据值以通过移位寄存器移位数据位。