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    • 18. 发明授权
    • Rail-to-rail driver for use in a regulator, and method
    • 用于调节器的轨对轨驱动器和方法
    • US6373295B2
    • 2002-04-16
    • US33771499
    • 1999-06-21
    • SEMICONDUCTOR COMPONENTS IND
    • KADANKA PETRROZSYPAL ANTONIN
    • H03F3/30H03B1/00
    • H03F3/3016H03F3/3028H03F3/3066H03F3/3076H03F2200/432
    • For use in a regulator, a driver (200) has a first transistor pair (203, 204) for alternatively pulling a drive line (OUT, 196) to magnitudes in a limited magnitude range between first and second reference lines (191, 192) depending on an input signal (IN, 195). Parallel to the first pair (203, 204), a second transistor pair (212, 210) alternatively pulls the drive line (OUT, 196) substantially to the reference lines (191, 192). The second pair (212, 210) is controlled by a comparator arrangement (120, 130) comparing the input signal to first (REF-1) and second (REF-2) reference signals and activating the second pair (212, 210) substantially only when the signal (OUT) on the drive line (196) driven by the first pair reaches a magnitude limit. The transistors (203, 204) of the first pair are arranged as emitter followers and the transistors (212, 210) of the second pair are arranged as switched current sources.
    • 为了在调节器中使用,驱动器(200)具有第一晶体管对(203,204),用于在第一和第二参考线(191,192)之间交替地将驱动线(OUT,196)拉动到有限幅度范围内的幅度, 取决于输入信号(IN,195)。 平行于第一对(203,204),第二晶体管对(212,210)交替地将驱动线(OUT,196)拉动到参考线(191,192)。 第二对(212,210)由比较器装置(120,130)控制,比较输入信号与第一(REF-1)和第二(REF-2)参考信号,并基本上激活第二对 只有当由第一对驱动的驱动线路(196)上的信号(OUT)达到幅度极限时才会发生。 第一对的晶体管(203,204)被布置为发射极跟随器,并且第二对的晶体管(212,210)被布置为开关电流源。