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    Radio receiving circuit with a search tuning mechanism
    1.
    发明授权
    Radio receiving circuit with a search tuning mechanism 失效
    无线电接收电路，具有搜索调谐机制

    公开(公告)号：US4792988A

    公开(公告)日：1988-12-20

    申请号：US031949

    申请日：1987-03-27

    申请人： Tamaki Ohashi ,  Toshiyuki Matsuda

    发明人： Tamaki Ohashi ,  Toshiyuki Matsuda

    IPC分类号： H03J7/30

    CPC分类号： H03J7/30

    摘要： A radio receiving circuit provided with a search tuning mechanism. A broadcasting radiowave signal is received during a search tuning operation, and a shift amount of frequency produced in frequency of an intermediate frequency amplifier output is experimentally determined within an inertia self-travelling time interval search tuning mechanism due to the mechanical inertia thereof from the moment at which a drive force applied to the search tuning mechanism is interrupted to the time when the mechanism temporarily positively stops its function. The drive force applied to the search tuning mechanism is interrupted at a frequency deviated by the shift amount in advance from a center frequency of a pass band width of the intermediate frequency amplifier circuit, whereby after the mechanism has self-travelled due to its own mechanical inertia force and when tuned to the center frequency of the received radiowave signal, the search tuning operation is suspended.

    摘要翻译： 一种设置有搜索调谐机构的无线电接收电路。 在搜索调谐操作期间接收广播无线电波信号，并且在惯性自行车时间间隔搜索调谐机构中由于其瞬间的机械惯性而在中频放大器输出的频率中产生的频率的偏移量被实验地确定 施加到搜索调谐机构的驱动力中断到机构暂时地正常地停止其功能的时间。 施加到搜索调谐机构的驱动力以从中频放大器电路的通带宽度的中心频率预先偏移移位量的频率中断，由此机构由于其自身的机械自行行进 惯性力，当调谐到接收到的无线电波信号的中心频率时，搜索调谐操作被暂停。

    Television signal-seeking automatic tuning system
    2.
    发明授权
    Television signal-seeking automatic tuning system 失效
    电视信号自动调谐系统

    公开(公告)号：US4047226A

    公开(公告)日：1977-09-06

    申请号：US716862

    申请日：1976-08-23

    申请人： Rhey Warren Hedges

    发明人： Rhey Warren Hedges

    IPC分类号： H03J7/30 ,  H04N5/50 ,  H04N5/44 ,  H04N3/24

    CPC分类号： H04N5/505 ,  H03J7/30 ,  H04N5/50

    摘要： An intercarrier television receiver is provided with a motor-driven signal seeker coupled to the tuner of the receiver and operative to continuously tune the receiver until stopped by a control signal. The control signal is generated by monitoring and comparing the amplitudes of the picture subcarrier and sound subcarrier signals produced by the IF circuits of the receiver, and by using said comparison to generate a control signal only when the amplitude of the picture subcarrier signal is higher than the amplitude of the sound subcarrier signal by a predetermined ratio. Generation of the control signal interrupts the operation of the signal-seeker at points of correct tuning in a predetermined television frequency spectrum. Provision is also made to mute the picture- and sound-producing channels of the receiver until the signal seeker has tuned the receiver to a point of correct signal reception.

    摘要翻译： 一个载波间电视接收机设置有耦合到接收机的调谐器的电机驱动信号探测器，并且可操作以连续地调谐接收机，直到由控制信号停止。 通过监视和比较由接收机的IF电路产生的图像副载波和声音副载波信号的振幅，并且仅在图像副载波信号的振幅高于 声音副载波信号的振幅以预定比例。 控制信号的产生在预定的电视频谱中的正确调谐点处中断信号探测器的操作。 还提供了将接收机的图像和声音产生通道静音，直到信号探测器将接收机调谐到正确的信号接收点。

    Radio tuning apparatus
    3.
    发明授权
    Radio tuning apparatus 失效
    无线电调谐装置

    公开(公告)号：US3854342A

    公开(公告)日：1974-12-17

    申请号：US42409873

    申请日：1973-12-12

    申请人： PHILCO FORD CORP

    发明人： SMITH R

    IPC分类号： H03J7/30 ,  F16H35/18

    CPC分类号： H03J7/30

    摘要： Radio receiving apparatus having an adjustable search tuner operable over a predetermined band of frequencies, and drive means for moving the tuner at a relatively slow rate for search tuning in one direction of travel, and at a relatively rapid rate for repositioning in the opposite direction. The drive means comprises a tuner drive shaft, a unidirectionally rotatable motor, a lever, and first and second solenoid means coupled with the lever, each selectively energizable to rock the lever in one or the other direction. First and second drive wheel means of different diameters are driven with the motor and are mounted for rotation on the lever. Energization of the first solenoid means rocks the lever in one direction to effect slow tuner drive coupling between the first drive wheel means and the tuner drive shaft. Energization of the second solenoid means rocks the lever in the other direction to effect rapid tuner drive coupling between the second drive wheel means and the tuner drive shaft.

    摘要翻译： 具有可在预定频带上操作的可调搜索调谐器的无线电接收设备，以及用于以相对较慢的速率移动调谐器的驱动装置，用于在一个行进方向进行搜索调谐，并且以相对较快的速率在相反方向上重新定位。 驱动装置包括调谐器驱动轴，单向旋转马达，杠杆以及与杠杆联接的第一和第二螺线管装置，每个螺线管选择器可激励以在一个或另一个方向上摇动杠杆。 具有不同直径的第一和第二驱动轮装置由电动机驱动并且安装成在杠杆上旋转。 第一螺线管的通电意味着在一个方向上摇动杠杆，以实现第一驱动轮装置和调谐器驱动轴之间的慢调谐器驱动耦合。 第二螺线管的通电意味着使杠杆沿另一方向摇动，以实现第二驱动轮装置和调谐器驱动轴之间的快速调谐器驱动联接。

    Motorized radio search tuner
    4.
    发明授权
    Motorized radio search tuner 失效
    摩托罗拉无线电搜索调谐器

    公开(公告)号：US3852691A

    公开(公告)日：1974-12-03

    申请号：US43679474

    申请日：1974-01-25

    申请人： PHILCO FORD CORP

    发明人： KELL H ,  YEAGER E ,  MANTEGHIAN A

    IPC分类号： H03J7/30 ,  H03J1/08 ,  H03J1/12

    CPC分类号： H03J7/30

    摘要： Radio receiving apparatus having an adjustable search tuner operable over a predetermined band of frequencies, and drive means for moving the tuner at a relatively slow rate for search tuning in one direction of travel, and at a relatively rapid rate for repositioning in the opposite direction. The drive means comprises a tuner drive shaft, a unidirectionally rotatable motor, a lever, and first and second solenoid means coupled with the lever, each selectively energizable to rock the lever in one or the other direction. First and second drive wheel means of different diameters are driven by the motor, and a pair of spaced idler wheels are mounted for rotation on the lever. A first one of the idler wheels is in driven engagement with the larger diameter drive wheel means and the second one of the idler wheels is in driven engagement with the lesser diameter drive wheel means. Energization of the first solenoid means rocks the lever in one direction to engage the second idler wheel with the tuner drive shaft and effect slow drive of the tuner drive shaft. Energization of the second solenoid means rocks the lever in the other direction to engage the first idler wheel with the tuner drive shaft and effect rapid drive of the tuner drive shaft.

    摘要翻译： 具有可在预定频带上操作的可调搜索调谐器的无线电接收装置，以及用于以相对较慢的速率移动调谐器的驱动装置，用于在一个行进方向进行搜索调谐，并且以相对较快的速率在相反方向上重新定位。 驱动装置包括调谐器驱动轴，单向旋转马达，杠杆以及与杠杆联接的第一和第二螺线管装置，每个螺线管选择器可激励以在一个或另一个方向上摇动杠杆。 不同直径的第一和第二驱动轮装置由电动机驱动，并且一对间隔开的惰轮被安装用于在杠杆上旋转。 惰轮中的第一个与较大直径的驱动轮装置驱动接合，并且第二个惰轮与较小直径的驱动轮装置驱动接合。 第一螺线管的通电意味着使杠杆沿一个方向摇动，使第二惰轮与调谐器驱动轴接合，并使调谐器驱动轴的驱动变慢。 第二螺线管的通电意味着在另一个方向上摇动杠杆，以使第一惰轮与调谐器驱动轴接合并且实现调谐器驱动轴的快速驱动。

    Automatic tuning device for a broadcast receiver
    5.
    发明授权
    Automatic tuning device for a broadcast receiver 失效
    用于广播接收机的自动调谐装置

    公开(公告)号：US3688199A

    公开(公告)日：1972-08-29

    申请号：US3688199D

    申请日：1970-05-13

    申请人： YOSHIFUMI SAEKI ,  SEIICHIRO KURIHARA

    发明人： SAEKI YOSHIFUMI ,  KURIHARA SEIICHIRO

    IPC分类号： H03J7/30 ,  H04B1/32

    CPC分类号： H03J7/30

    摘要： A device for automatically tuning a channel on a broadcast receiver which has a right or left direction indicating circuit operated by closing a start push-button switch, the indicating circuit operating a differential amplifier circuit which in turn operates an electric motor which turns a variable condenser. The device further comprises a coarse tuning pulse signal generating circuit to generate a pulse signal when the condenser is near the tuning point, and a coarse tuning bistable multivibrator which is switched by a pulse signal from the coarse tuning pulse signal generating circuit to shut off the power to the right or left direction indicating circuit. When the indicating circuit is switched, a sinusoidal signal from a discriminator is applied to an input of the differential amplifying circuit. The device also has a switching circuit for de-energizing the differential amplifying circuit after the fine tuning is completed by the sinusoidal signal and for delaying for a predetermined time a further output of the coarse tuning bistable multivibrator to enable manual tuning.

    摘要翻译： 一种用于自动调谐广播接收机上的频道的装置，其具有通过关闭开始按钮开关而操作的右或左方向指示电路，所述指示电路操作差分放大器电路，所述差分放大器电路又操作电动机，所述电动机使可变电容器 。 该装置还包括粗调谐脉冲信号发生电路，用于当电容器靠近调谐点时产生脉冲信号;以及粗调双稳态多谐振荡器，其由来自粗调脉冲信号发生电路的脉冲信号切换，以切断 电源向右或向左指示电路。 当指示电路被切换时，来自鉴频器的正弦信号被施加到差分放大电路的输入。 该器件还具有用于在通过正弦信号完成微调之后使差分放大电路断电并且用于延迟预定时间的开关电路，进一步输出粗调双稳态多谐振荡器以实现手动调谐。