Bi-directional voltage translator
    5.
    发明授权
    Bi-directional voltage translator 失效
    双向电压转换器

    公开(公告)号:US6154057A

    公开(公告)日:2000-11-28

    申请号:US340232

    申请日:1999-07-01

    IPC分类号: H03K19/018 H03K19/0175

    CPC分类号: H03K19/01843

    摘要: A bi-directional voltage translator (125) has a first port (201) that communicates a signal at a first voltage level, and second port (202) that communicates a signal at a second voltage level different from the first voltage level. A switching circuit, including a bipolar junction transistor (210) and a switch (220), couples both ports (201, 202). The transistor (210) has a collector (211) coupled, via a pull-up circuit (206), to a voltage source corresponding to the first voltage level, and to the first port (201), and an emitter (212) coupled to the second port. The base (213) of the transistor (210) is coupled, via a pull-up circuit (207), to a voltage source corresponding to the second voltage level. Preferably, the switch (220) is Schottky diode or other diode having a forward voltage drop.

    摘要翻译: 双向电压转换器(125)具有以第一电压电平传送信号的第一端口(201)和以不同于第一电压电平的第二电压电平传送信号的第二端口(202)。 包括双极结型晶体管(210)和开关(220)的开关电路耦合两个端口(201,202)。 晶体管(210)具有经由上拉电路(206)耦合到对应于第一电压电平的电压源和耦合到第一端口(201)的集电极(211),并且发射极(212)耦合 到第二个港口 晶体管(210)的基极(213)经由上拉电路(207)耦合到对应于第二电压电平的电压源。 优选地,开关(220)是具有正向压降的肖特基二极管或其它二极管。