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    Video multiplexing system
    1.
    发明授权
    Video multiplexing system 失效
    视频多路复用系统

    公开(公告)号：US3647949A

    公开(公告)日：1972-03-07

    申请号：US3647949D

    申请日：1969-06-23

    Applicant: IBM

    Inventor： CLOSS FELIX H ,  SEITZER DIETER ,  STUCKI PETER

    IPC: H04J3/17 ,  H04J3/24 ,  H04N1/411 ,  H04N1/44 ,  H04N21/2365 ,  H04N21/434

    CPC classification number: H04N21/4347 ,  H04J3/17 ,  H04J3/24 ,  H04N1/411 ,  H04N21/2365

    Abstract: A system is provided for the simultaneous transmission of pictures between a plurality of scanning stations and a plurality of corresponding receiver stations. The pictures to be transmitted comprise two levels of brightness such as, for example, a document having black print on a white background. Each of the scanning stations scans, in a pseudorandom fashion, its respective picture to provide an output signal indicative of the information on one of the levels of brightness, as for example, the black print information on the document. This information output signal is then multiplexed. A coder and multiplexer upon receiving an information signal, during a given time interval, from one of the scanning stations generate an address signal corresponding to the address of the station providing the information signal whereupon the address signal is transmitted to a decoder at the receiving end for decoding and providing an information signal to the appropriate receiver. When the coder and multiplexer simultaneously receive information signals from two scanning stations within a given time interval a priority control circuit selects one of the signals.

    Abstract translation: 提供一种用于在多个扫描站和多个对应的接收站之间同时传输图像的系统。 要发送的图像包括诸如例如在白色背景上具有黑色打印的文档的两个亮度级别。 每个扫描站以伪随机的方式扫描其各自的图像，以提供指示关于亮度级别之一的信息的输出信号，例如关于文档的黑色打印信息。 该信息输出信号被复用。

    8.
    发明专利
    未知

    公开(公告)号：DE1487338A1

    公开(公告)日：1969-04-10

    申请号：DE1487338

    申请日：1966-11-15

    Applicant: IBM

    Inventor： SEITZER DIETER ,  LUESCHER ROLF

    IPC: G06G7/14 ,  G06G7/18 ,  H03F3/26 ,  H03F3/343 ,  H03K5/02 ,  H03F3/68

    Abstract: 1,106,839. Transistor amplifiers. INTERNATIONAL BUSINESS MACHINES CORPORATION. 24 Nov., 1966 [26 Nov., 1965], No. 52627/66. Heading H3T. In a differential amplifier comprising a transistor T1 having its base connected directly to a first input A and to a resistor Z for matching the first input to its signal source and its emitter connected by a resistor network R1, R2 to a second input A 1 arid to a voltage source, the resistor network R1, R2, R3 and R9 is arranged such that the second input A 1 is matched to its signal source and such that the current gains from the first input to the output at the collector and from the second input to the output at the collector are equal. As shown a further two similar amplifiers T2 and T3 are provided having two more inputs B, B 1 and an output taken from the collector D of the transistor T3. Transistor T3, which receives its inputs from the output of the transistors T1 and T2, may be replaced by a transistor of the NPN type and each differential amplifier or the complete circuit can be constructed in an integrated form. The differential amplifier, may be fed with pushpull input signals and the signal source may comprise a long transmission line.

    Tunnel diode multistable circuit
    9.
    发明专利
    Tunnel diode multistable circuit 未知

    公开(公告)号：GB1085178A

    公开(公告)日：1967-09-27

    申请号：GB4920665

    申请日：1965-11-19

    Applicant: IBM

    Inventor： KOHN GERHARD ,  SEITZER DIETER

    IPC: H03K3/315

    Abstract: 1,085,178. Tristable tunnel diode circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Nov. 19, 1965 [Dec. 24, 1964], No. 49206/65. Heading H3T. A switching circuit for use as an amplifier of the first half of a bipolar pulse which is insensitive to the second half, has a current-voltage characteristic with three stable regions separated by two negative resistance regions, and is composed of three parallel current paths, two of which contain tunnel diodes oppositely poled with respect to one another and the third of which consists of a resistor. The two diodes are forwardly biased (Fig. 3, not shown). In a practical form (Fig. 5) the bias sources for the tunnel diodes are in the form of a voltage divider R1, R2 across a voltage source V s . The circuit is initially in its central stable state (A - , Fig. 4, not shown), and a positive current pulse at 11 will switch it to its positive highvoltage state (B), while a negative current pulse will switch it to its negative high-voltage state (C). Switching direct from (B) to (C) or vice versa needs a pulse of greater amplitude than the initial pulse and hence the circuit is insensitive to the second half of a normal bipolar pulse from a thin film magnetic store. Asymmetries in the diode characteristics can be corrected by changing the ratio of R1 and R2, which can be constructed as a potentiometer. The source V s can be a strobe pulse generator with a sharp initial peak to reset the circuit to point A on the characteristic at the end of the peak. The sum of R and the parallel connection of R1 + R2 (in ohms) should be between 4/3 and 4/5 times the ratio of the voltage (in millivolts) provided by the source and the tunnel-diode peak current (in milliamps),

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