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    • 8. 发明授权
    • CMOS transceiver with dual current path VCO
    • 具有双电流通道VCO的CMOS收发器
    • US07551909B1
    • 2009-06-23
    • US10651500
    • 2003-08-29
    • Yongsam MoonYoung Soo ParkDeog-Kyoon Jeong
    • Yongsam MoonYoung Soo ParkDeog-Kyoon Jeong
    • H04B1/06
    • H03L7/107H03L7/0812H03L7/087H03L7/0891H03L7/0995
    • A dual current path voltage controlled oscillator exhibits both the seamless frequency acquisition and uniform VCO gain reduction while preserving an original operating range and phase locked loop characteristics. The present invention provides a quad-channel transceiver comprising a phase locked loop circuit including a voltage controlled oscillator used to generate a clock signal, a FIFO buffer used to store data to be transmitted, a frequency comparator for comparing a reference clock to the generated clock signal from the phase locked loop circuit; and a folded starved inverter circuit contained within the voltage controlled oscillator wherein the folded starved inverter provides two current paths. The dual current paths allow for simultaneous coarse and fine phase tracking. With this low jitter performance and wide operating range, the quad transceiver may be implemented in 0.18-μm CMOS technology, and shows 10−12 bit error rate up to speeds of 3 Gbps.
    • 双电流通道压控振荡器既保留了无缝频率采集和均匀的VCO增益降低,​​又保留了原始工作范围和锁相环特性。 本发明提供了一种四通道收发器,包括一个锁相环电路,该锁相环电路包括用于产生时钟信号的压控振荡器,用于存储要发送的数据的FIFO缓冲器,用于将参考时钟与所产生的时钟进行比较的频率比较器 来自锁相环电路的信号; 以及包含在压控振荡器内的折叠饥饿逆变器电路,其中折叠的饥饿逆变器提供两个电流路径。 双电流路径允许同步粗略和精细的相位跟踪。 凭借这种低抖动性能和广泛的工作范围,四通道收发器可以以0.18微米CMOS技术实现,并显示出10到12位的误码率,达到3 Gbps的速度。
    • 10. 发明授权
    • Phase lock loop with coarse control loop having frequency lock detector and device including same
    • 具有粗调控制回路的锁相环具有频率锁定检测器和包括其的装置
    • US07102446B1
    • 2006-09-05
    • US11056995
    • 2005-02-11
    • Hyung-Rok LeeMoon-Sang HwangSang-Hyun LeeBong-Joon LeeDeog-Kyoon Jeong
    • Hyung-Rok LeeMoon-Sang HwangSang-Hyun LeeBong-Joon LeeDeog-Kyoon Jeong
    • H03L7/07H03L7/087H04B1/40H04B1/50
    • H03L7/087H03K23/507H03L7/089H03L7/093H03L7/099H03L7/0995H03L7/10H03L2207/06H04L7/0337Y10S331/02
    • A phase lock loop (PLL) for controlling a sampling clock or other clock, and a data sampling circuit, transceiver, or other device including such a PLL. The PLL includes a multi-range VCO, at least one fine control loop for controlling the VCO, and a coarse control loop for controlling the VCO by changing its frequency-voltage characteristic. The coarse control loop includes a frequency lock detector and voltage range monitoring logic. Typically, the frequency lock detector locks operation of the coarse control loop when the difference between the VCO output clock frequency and a reference frequency decreases to within a predetermined threshold, and the unlocked coarse control loop employs the voltage range monitoring logic to change the VCO frequency-voltage characteristic when the VCO's fine control voltage leaves a predetermined range. Other aspects are a transceiver (including at least two receiver interfaces and a transmitter interface) implementing a clocking scheme employing no more than three PLLs for clock generation, and a transceiver having a multi-layered receiver interface including digital circuitry and a single clock-generating PLL (an analog PLL for generating a multiphase clock to be shared by all layers of the receiver interface). Each receiver interface layer performs blind oversampling on a different received signal using the multiphase clock and the digital circuitry includes multilayered digital phase lock loop circuitry which receives the oversampled data.
    • 用于控制采样时钟或其他时钟的锁相环(PLL)以及数据采样电路,收发器或包括这种PLL的其它装置。 PLL包括多范围VCO,用于控制VCO的至少一个精细控制环路和用于通过改变其频率 - 电压特性来控制VCO的粗略控制环路。 粗调控制回路包括一个频率锁定检测器和电压范围监控逻辑。 通常,当VCO输出时钟频率和参考频率之间的差减小到预定阈值时,频率锁定检测器锁定粗略控制环路的操作,而解锁的粗略控制环路采用电压范围监控逻辑来改变VCO频率 当VCO的精细控制电压离开预定范围时的电压特性。 其他方面是实现采用不超过三个PLL用于时钟产生的时钟方案的收发器(包括至少两个接收器接口和发射器接口),以及具有包括数字电路和单个时钟产生的多层接收器接口的收发器 PLL(用于产生要由接收器接口的所有层共享的多相时钟的模拟PLL)。 每个接收器接口层使用多相时钟在不同的接收信号上执行盲过采样,并且数字电路包括接收过采样数据的多层数字锁相环电路。