利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

7 条记录 (耗时 0.012 秒)

    Channel selection apparatus having automatic frequency compensation for transmission frequency error
    1.
    发明公开
    Channel selection apparatus having automatic frequency compensation for transmission frequency error 失效
    具有传输频率错误的自动频率补偿的通道选择装置

    公开(公告)号：EP0273389A3

    公开(公告)日：1989-01-25

    申请号：EP87119134.2

    申请日：1987-12-23

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Kubo, Kazuhiko ,  Usui, Akira ,  Miyata, Minoru ,  Ikuhara, Hideyuki ,  Nagai, Hiroyuki ,  Yamada, Tadashi

    IPC分类号： H03J7/06

    CPC分类号： H03J7/065

    摘要： A channel selection apparatus having a double superhet tuner section (15) for converting one of a plurality of television channels contained in an input signal to a fixedly predetermined channel, includes an AFC circuit (11) for producing a frequency control voltage to execute closed-loop frequency control of the second local oscillator (5) of the tuner section while an AFC switch (16) is set in a first condition, whereas when the AFC switch is set in a second condition, a fixed frequency control voltage is applied to the second local oscillator and the frequency control voltage is applied to adust the oscillation frequency of the first local oscillator (2) of the tuner section such as to compensate for any offset in the transmission frequency of a currently selected channel.

    Aural signal demodulation apparatus for a television receiver
    4.
    发明公开
    Aural signal demodulation apparatus for a television receiver 失效
    用于电视接收机的听觉信号解调装置

    公开(公告)号：EP0056270A1

    公开(公告)日：1982-07-21

    申请号：EP82100138.5

    申请日：1982-01-11

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Sakimichi, Shigeyuki ,  Iwao, Toyohiro ,  Nagai, Hiroyuki

    IPC分类号： H04N5/60

    CPC分类号： H04N5/607

    摘要： An apparatus for receiving and demodulating an aural multiplex signal of a television receiver is provided. (R+L)/2 and R signals acting as main and auxiliary aural signals are transmitted to the apparatus at reception of stereo broadcasting, and first and second aural signals acting as the main and auxiliary aural signals are transmitted at reception of dual broadcasting. A first amplifier (7) amplifies the main aural signal by switching the alternating current gain of either 2n or n times, and a second amplifier (13) having the gain of n times amplifies the auxiliary aural signal. At the reception of stereo broadcasting, the L and R aural output signals are obtained from the main aural signal amplified by 2n times and the auxiliary aural signal amplified by n times. At the reception of dual broadcasting, first and second aural output signals are obtained from the main and auxiliary aural signals both amplified by n times.

    摘要翻译： 提供了一种用于接收和解调电视接收机的伴音复用信号的装置。 （R + L）/ 2和R信号在接收到立体声广播时被发送到设备，并且在双重广播接收时发送作为主和辅助声音信号的第一和第二声音信号。 第一放大器（7）通过切换2n或n次的交流增益来放大主要听觉信号，而具有n倍增益的第二放大器（13）放大辅助听觉信号。 在立体声广播的接收中，L和R音频输出信号是从放大了2n倍的主音频信号中获得的，并且辅助音频信号被放大了n倍。 在双重广播的接收中，第一和第二听觉输出信号从主音频信号和辅助音频信号中获得，并被放大n倍。

    Channel selection apparatus having automatic frequency compensation for transmission frequency error
    6.
    发明公开
    Channel selection apparatus having automatic frequency compensation for transmission frequency error 失效
    KanalwahlgerätmitselbsttätigerKompensierung des Sendefrequenzfehlers。

    公开(公告)号：EP0273389A2

    公开(公告)日：1988-07-06

    申请号：EP87119134.2

    申请日：1987-12-23

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Kubo, Kazuhiko ,  Usui, Akira ,  Miyata, Minoru ,  Ikuhara, Hideyuki ,  Nagai, Hiroyuki ,  Yamada, Tadashi

    IPC分类号： H03J7/06

    CPC分类号： H03J7/065

    摘要： A channel selection apparatus having a double superhet tuner section (15) for converting one of a plurality of television channels contained in an input signal to a fixedly predetermined channel, includes an AFC circuit (11) for producing a frequency control voltage to execute closed-loop frequency control of the second local oscillator (5) of the tuner section while an AFC switch (16) is set in a first condition, whereas when the AFC switch is set in a second condition, a fixed frequency control voltage is applied to the second local oscillator and the frequency control voltage is applied to adust the oscillation frequency of the first local oscillator (2) of the tuner section such as to compensate for any offset in the transmission frequency of a currently selected channel.

    摘要翻译： 具有用于将包含在输入信号中的多个电视频道中的一个转换为固定预定频道的双重监视调谐器部分（15）的频道选择装置包括用于产生频率控制电压的AFC电路（11） 当AFC开关（16）被设置在第一状态时，调谐器部分的第二本地振荡器（5）的环路频率控制，而当AFC开关被设置在第二状态时，固定的频率控制电压被施加到 第二本地振荡器和频率控制电压被施加到调谐器部分的第一本地振荡器（2）的振荡频率，以补偿当前选择的信道的传输频率中的任何偏移。