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208 条记录 (耗时 0.012 秒)

    Remote control receiver using a phase locked loop
    51.
    发明授权
    Remote control receiver using a phase locked loop 失效
    远程控制接收器使用相位锁定环路

    公开(公告)号：US3701103A

    公开(公告)日：1972-10-24

    申请号：US3701103D

    申请日：1971-04-07

    申请人： WARWICK ELECTRONICS INC

    发明人： PADGETT WILLIAM J ,  WISON DONALD A

    IPC分类号： G08C19/12 ,  H04Q9/02

    CPC分类号： G08C19/12

    摘要： A remote control receiver selectively responsive to a plurality of different frequency command signals to control corresponding different command functions. The receiver uses a phase locked loop including a controlled oscillator having a variable frequency output which is compared in a phase comparator with the received command signal. The detected phase difference generates an error voltage which shifts the oscillator from its quiescent frequency to the incoming frequency and phase locks the controlled oscillator to the command signal. The error voltage also activates only one of several DC voltage comparators, with a different comparator corresponding to each command function. Each comparator includes a means of establishing a reference voltage and means for activating a driver stage for the corresponding remote function when the error voltage generated by the phase comparator to lock the receiver to a particular command frequency and equals the corresponding reference voltage.

    摘要翻译： 选择性地响应于多个不同频率命令信号来控制相应的不同命令功能的遥控接收器。 接收机使用包括具有可变频率输出的受控振荡器的锁相环，其在相位比较器中与接收到的命令信号进行比较。 检测到的相位差产生将振荡器从其静态频率移动到输入频率的误差电压，并且将受控振荡器锁定到命令信号。 误差电压也仅激活几个直流电压比较器中的一个，其中不同的比较器对应于每个指令功能。 每个比较器包括建立参考电压的装置，以及当由相位比较器产生的误差电压将接收机锁定到特定的指令频率并等于相应的参考电压时，用于为相应的远程功能激活驱动级的装置。

    Remote controlled television tuner motor switching circuit
    52.
    发明授权
    Remote controlled television tuner motor switching circuit 失效
    远程控制电视调谐器电机切换电路

    公开(公告)号：US3691444A

    公开(公告)日：1972-09-12

    申请号：US3691444D

    申请日：1971-10-12

    申请人： RCA CORP

    发明人： JUROFF LYLE BRUCE ,  LUNN LAWRENCE MARK

    IPC分类号： G08C19/12 ,  H03J5/14 ,  H03J5/24

    CPC分类号： H03J5/242 ,  G08C19/12 ,  H03J5/14

    摘要： A remote controlled television receiver includes a VHF and a UHF tuner each having tunable resonant circuits which are adjusted by the gear train of a remotely controlled motor. The tuners are connected so that during UHF operation the VHF tuner provides amplification of the UHF tuner IF signal output. A relay switch is operatively connected to the VHF motor to control the motor energization. Switch means are coupled to the VHF tuner motor gear train and provide an indication when the VHF tuner is adjusted for amplification of the UHF tuner IF signal output. A bistable multivibrator is coupled to the switch means in a manner so that the multivibrator changes states in response to the switch indication. A relay winding current control means responds to the change in state to prevent current from flowing into the relay winding. This causes the relay switch to open and deenergizes the VHF motor. A second relay switch is operatively connected to the UHF motor to control the motor energization. A second relay current control means is connected to permit a flow of current through the second relay winding only when the switch indication is present.

    Rf-controlled solid-state switch
    53.
    发明授权
    Rf-controlled solid-state switch 失效
    RF控制固态开关

    公开(公告)号：US3621290A

    公开(公告)日：1971-11-16

    申请号：US3621290D

    申请日：1969-10-09

    申请人： NASA

    发明人： FRYER THOMAS B

    IPC分类号： A61B5/00 ,  G08C19/12 ,  H03K17/30 ,  H03K17/60

    CPC分类号： G08C19/12 ,  A61B5/0002 ,  H03K17/30 ,  Y10S128/903

    摘要： An electronic element, capable of presenting either a high impedance or a low impedance between a power source and an instrument, is switched from its high impedance to its low impedance state by turning on both active elements of a complementary bistable multivibrator. By momentarily shortcircuiting one of the two active elements of the complementary bistable multivibrator, thereby driving its two active elements from the on to the off state, the electronic element is switched back from its low impedance to its high impedance state. When off, this circuit consumes essentially zero standby power. Alternative-switching circuits use symmetrical bistable multivibrators, activated by amplified and rectified transmitted pulses, to switch a gating element from its high impedance to its low impedance state, and vice versa.