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公开(公告)号:US6154057A
公开(公告)日:2000-11-28
申请号:US340232
申请日:1999-07-01
申请人: Shuyong Shao , Hung Vuong , Charles Browder , Christine Purcell
发明人: Shuyong Shao , Hung Vuong , Charles Browder , Christine Purcell
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。
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公开(公告)号:US20070120574A1
公开(公告)日:2007-05-31
申请号:US11288616
申请日:2005-11-29
申请人: Timothy Houston , Charles Browder , Carlos Garrafa
发明人: Timothy Houston , Charles Browder , Carlos Garrafa
IPC分类号: H03K19/003
CPC分类号: H04L25/0298
摘要: A cable area network (CAN) bus termination (100) is provided by an interface 104 operably coupling a cable detection input pin (3), a switch (120) and a termination resistance (130) to detect the presence and absence of one or more cables (108). The termination resistance (130) is automatically enabled to create terminations at end nodes and is automatically disabled to provide a daisy-chain connection between interim nodes of a multi-cable system.
摘要翻译: 电缆区域网络(CAN)总线终端(100)由可操作地耦合电缆检测输入引脚(3),开关(120)和终端电阻(130)的接口104提供,以检测是否存在一个或多个 更多电缆(108)。 终端电阻(130)自动启用,以在终端节点上创建终端,并自动禁用,以在多电缆系统的中间节点之间提供菊花链连接。
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