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    Synchronous AC to DC conversion of differential AC signals
    2.
    发明授权
    Synchronous AC to DC conversion of differential AC signals 失效
    差分交流信号的同步AC到DC转换

    公开(公告)号：US5729163A

    公开(公告)日：1998-03-17

    申请号：US627957

    申请日：1996-04-03

    申请人： Rex McCleary ,  Daniel Dean Thacker

    发明人： Rex McCleary ,  Daniel Dean Thacker

    IPC分类号： H02M3/07 ,  H02M7/217 ,  G05F1/10

    CPC分类号： H02M7/217 ,  H02M3/07 ,  H02M2003/071 ,  Y10T307/527

    摘要： AC to DC signal conversion for use in applications including conditioning of signals supplied by inductive position sensors that are employed in aircraft electrical and electronic systems. First and second switching circuits (14 and 16) are synchronously switched between operational states in which an applied AC signal is supplied to the switching circuits and a second operational state in which the switching circuits supply charge (current). When one switching circuit (e.g., 14) is in the first operational state, the second switching circuit (e.g., 16) is in the second operational state so that one switching circuit senses the AC signal during positive half cycles and the other switching circuit senses the AC signal during negative half cycles. A pair of capacitors (18 and 20) are connected between a pair of output terminals. The first switching circuit (14) charges one capacitor (18) when the first switching circuit is in its second operational state and the second switching circuit (16) charges the other capacitor (20) when the second switching circuit is in its second operational state. A buffer amplifier (22) can be used for receiving the signal developed across the capacitors (18 and 20) to thereby provide isolation relative to a circuit or system that is connected for receiving the DC signal supplied by the AC to DC signal conversion.

    摘要翻译： AC到DC信号转换用于包括对由飞机电气和电子系统中使用的感应位置传感器提供的信号进行调理的应用。 第一和第二开关电路（14和16）在施加的AC信号被提供给开关电路的操作状态和开关电路提供充电（电流）的第二操作状态之间同步切换。 当一个开关电路（例如14）处于第一操作状态时，第二开关电路（例如16）处于第二操作状态，使得一个开关电路在正半周期期间感测到AC信号，另一个开关电路感测 负半周期内的交流信号。 一对电容器（18和20）连接在一对输出端子之间。 当第二开关电路处于其第二操作状态时，第一开关电路（14）在第一开关电路处于其第二操作状态时对第一开关电路（18）充电，并且第二开关电路（16）对另一个电容器（20）充电， 。 可以使用缓冲放大器（22）来接收在电容器（18和20）上产生的信号，从而提供相对于被连接用于接收由AC到DC信号转换提供的DC信号的电路或系统的隔离。

    Typesetting terminal apparatus having searching and merging features
    3.
    发明授权
    Typesetting terminal apparatus having searching and merging features 失效
    排版终端设备具有搜索和合并特征

    公开(公告)号：US4125868A

    公开(公告)日：1978-11-14

    申请号：US626075

    申请日：1975-10-28

    申请人： John F. Hruby ,  Rex McCleary ,  Jerome M. O'Hogan ,  Nathan H. Searle

    发明人： John F. Hruby ,  Rex McCleary ,  Jerome M. O'Hogan ,  Nathan H. Searle

    IPC分类号： B41B25/00 ,  B41B27/02 ,  G06F7/36 ,  G06F7/28 ,  G06F15/40 ,  G11B27/02

    CPC分类号： B41B27/02 ,  B41B25/00

    摘要： A typesetting terminal adapted for operating a photo typesetter includes a data processor with a plurality of peripheral devices coupled thereto, such as a keyboard, cathode ray tube display, cursor control and a plurality of tape transports. Information from the keyboard and selected tape transports is read into the data processor memory for access and display by the cathode ray tube and outputting to a further tape device. Desired information can be searched in the various input tapes for display, editing and combination with information derived from another input.

    摘要翻译： 适于操作照片排版机的排版终端包括具有耦合到其上的多个外围设备的数据处理器，诸如键盘，阴极射线管显示器，光标控制和多个磁带传输。 来自键盘和所选磁带传输的信息被读入数据处理器存储器，以便由阴极射线管进行访问和显示，并输出到另一个磁带设备。 可以在各种输入磁带中搜索所需的信息以进行显示，编辑和与从另一个输入导出的信息的组合。