CMOS controlled-impedance transmission line driver
    1.
    发明授权
    CMOS controlled-impedance transmission line driver 有权
    CMOS控制阻抗传输线驱动器

    公开(公告)号:US06909310B2

    公开(公告)日:2005-06-21

    申请号:US10354281

    申请日:2003-01-30

    IPC分类号: H03K17/041 H04L25/02 H03B1/00

    摘要: A line driver fabricated from CMOS devices that provides a substantially constant output impedance over a significant range of a time-varying input voltage includes a time-varying current source, a pair of CMOS output loads, and a pair of biasing circuits. Each CMOS output load includes a NMOS transistor and a PMOS transistor connected in parallel and each biased into a linear range of operation. In response to a time-varying input voltage, the time-varying current source draws current from the pair of CMOS output loads in a manner that operates each CMOS output load to collectively establish a time-varying output voltage component at an associated output terminal.

    摘要翻译: 由CMOS器件制造的线路驱动器,其在时变输入电压的有效范围内提供基本上恒定的输出阻抗,包括时变电流源,一对CMOS输出负载和一对偏置电路。 每个CMOS输出负载包括并联连接的NMOS晶体管和PMOS晶体管,并且各自被偏置成线性的操作范围。 响应于时变输入电压,随时间变化的电流源以操作每个CMOS输出负载的方式从一对CMOS输出负载中抽取电流,以共同建立相关输出端子处的时变输出电压分量。