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    • 7. 发明授权
    • Delay cell and phase locked loop using the same
    • 延迟单元和锁相环使用相同
    • US07961026B2
    • 2011-06-14
    • US12003676
    • 2007-12-31
    • Taek-Sang SongKyung-Hoon KimDae-Han Kwon
    • Taek-Sang SongKyung-Hoon KimDae-Han Kwon
    • H03H11/26
    • H03L7/0995H03K3/0322H03K5/133H03K2005/00208H03K2005/00234H03L2207/06
    • A phase locked loop that generates an internal clock by controlling a delay time of a delay cell according to conditions of PVT, thereby improving a jitter characteristic of the internal clock. The delay cell includes a first current controller for controlling first and second currents in response to a control voltage, and a second current controller for controlling the first and second currents in response to frequency range selection signals. The phase locked loop includes a phase comparator for comparing a reference clock with a feedback clock, a control voltage generator for generating a control voltage corresponding to an output of the phase comparator, and a voltage controlled oscillator for generating an internal clock having a frequency in response to the control voltage and one or more frequency range control signals, wherein the feedback clock is generated using the internal clock.
    • 通过根据PVT的条件控制延迟单元的延迟时间来产生内部时钟的锁相环,从而提高内部时钟的抖动特性。 延迟单元包括响应于控制电压控制第一和第二电流的第一电流控制器,以及响应频率范围选择信号控制第一和第二电流的第二电流控制器。 锁相环包括用于将参考时钟与反馈时钟进行比较的相位比较器,用于产生对应于相位比较器的输出的控制电压的控制电压发生器和用于产生具有频率的内部时钟的压控振荡器 响应于控制电压和一个或多个频率范围控制信号,其中使用内部时钟产生反馈时钟。
    • 9. 发明授权
    • Output driver
    • 输出驱动
    • US07884647B2
    • 2011-02-08
    • US12326990
    • 2008-12-03
    • Kyung-Hoon KimDae-Han KwonTaek-Sang Song
    • Kyung-Hoon KimDae-Han KwonTaek-Sang Song
    • H03K19/0175
    • H03K19/018528
    • There is provided an output driver, which includes a pre-driver configured to generate a main driving control signal in response to a data signal, a main driver configured to drive an output terminal in response to the main driving control signal, an auxiliary driving control signal generator configured to generate an auxiliary driving control signal having an activation interval corresponding to the data signal and an interval control signal, and an auxiliary driver configured to drive the output terminal in response to the auxiliary driving control signal.
    • 提供了一种输出驱动器,其包括配置为响应于数据信号产生主驱动控制信号的预驱动器,配置成响应于主驱动控制信号驱动输出端的主驱动器,辅助驱动控制 信号发生器,其被配置为产生具有与数据信号和间隔控制信号对应的激活间隔的辅助驱动控制信号,以及配置为响应于辅助驱动控制信号来驱动输出端子的辅助驱动器。