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    • 9. 发明授权
    • Interface driver circuit
    • 接口驱动电路
    • US4196360A
    • 1980-04-01
    • US871991
    • 1978-01-24
    • Edward B. MillerCharles W. Eichelberger
    • Edward B. MillerCharles W. Eichelberger
    • H03K5/02H03K5/22H03K19/0175H03K19/08H03K3/42
    • H03K5/22H03K19/017572H03K5/02
    • An interface driver circuit, for use in a programmable energy load controller system, comprises a pair of optically-coupled input sections, respectively receiving data and a special signal of digital nature and a first voltage polarity. A buffer amplifier section is coupled to the data input circuit for driving a twisted-wire transmission line, coupled to the paralleled inputs of a plurality of receivers, with logic signals alternating essentially between ground potential and the first voltage at the first polarity; a second amplifier section is enabled by the special signal input section and impresses a voltage of the remaining polarity across the interface driver circuit output when commanded at the special signal input, regardless of the state of the data signal at the first input.
    • 用于可编程能量负载控制器系统的接口驱动电路包括一对光耦合的输入部分,分别接收数据和数字特性的信号以及第一电压极性。 缓冲放大器部分耦合到数据输入电路,用于驱动耦合到多个接收器的并联输入的双绞线传输线,逻辑信号基本上在地电位和第一极性的第一电压之间交替; 第二放大器部分由特殊信号输入部分使能,并且在命令在特殊信号输入端时在接口驱动器电路输出端施加剩余极性的电压,而与第一输入端的数据信号的状态无关。
    • 10. 发明授权
    • Computer input/output interface systems using optically coupled isolators
    • 使用光耦合隔离器的计算机输入/输出接口系统
    • US3825896A
    • 1974-07-23
    • US24902172
    • 1972-05-01
    • TEXAS INSTRUMENTS INC
    • OBENHAUS R
    • H03K19/0175H04B10/00H03K17/56
    • H04B10/802H03K19/017572
    • An input/output interface system for a digital computer utilizes an optically coupled isolator which provides electrical isolation between an external device and the computer. The signal from the external device may be of either A.C. or D.C. form, and the interface system output signal is a logic signal compatible with the I/O logic of the computer. The preferred optically coupled isolator comprises a light emitting diode which is selectively positioned with respect to a photo transistor, such that the diode and photo transistor are physically, and thus electrically, spaced apart but are optically coupled together. A current input signal passing through the light emitting diode causes the diode to radiate, the radiation being received at the base of the photo transistor, which then produces a logic signal indication. In an output interface circuit, the light emitting diode is connected to receive the digital output of the computer and the output of the photo transistor drives a gating circuit which gates power to a load. The interface circuits are particularly adaptable for use in computerized control systems wherein external devices are monitored or controlled.
    • 用于数字计算机的输入/输出接口系统使用光耦合隔离器,其在外部设备和计算机之间提供电隔离。 来自外部设备的信号可以是A.C.或D.C.形式,并且接口系统输出信号是与计算机的I / O逻辑兼容的逻辑信号。 优选的光耦合隔离器包括相对于光电晶体管选择性地定位的发光二极管,使得二极管和光电晶体管在物理上并因此电隔离但是光耦合在一起。 通过发光二极管的电流输入信号导致二极管辐射,辐射在光电晶体管的基极处被接收,然后其产生逻辑信号指示。 在输出接口电路中,连接发光二极管以接收计算机的数字输出,并且光电晶体管的输出驱动向负载供电的门控电路。 接口电路特别适用于其中监视或控制外部设备的计算机控制系统中。