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    • 96. 发明授权
    • Preset tuning apparatus using floating gate type field effect device
    • 使用浮动门型场效应装置的预设调谐装置
    • US4200841A
    • 1980-04-29
    • US950453
    • 1978-10-11
    • Yoshinosuke NagataHiroshi KutsuyamaMakoto YamadaKazuyoshi Tsukamoto
    • Yoshinosuke NagataHiroshi KutsuyamaMakoto YamadaKazuyoshi Tsukamoto
    • H03J7/20H03J5/02H03J7/06H03J7/18H03J7/28H04B1/34
    • H03J7/06H03J5/0263H03J7/28
    • A preset tuning apparatus adapted for selecting a preset channel among a plurality of channels, comprising a tuner including a tuning circuit including a voltage controlled variable capacitance diode, a manually adjustable tuning voltage generator for providing a tuning voltage to the voltage controlled variable capacitance diode, a non-volatile analog storage including a plurality of floating gate type field effect memory devices, a band selection switch, a preset selection switch, a preset memory switch, addressing circuits coupled to the band selection and preset selection switches for addressing a corresponding one of the plurality of memory devices, an erase/write/read voltage generator, and a mode control coupled to the erase/write/read voltage generator and responsive to the band selection, preset selection and preset memory switches for alternately and repetitively writing and reading the analog value in the addressed memory device until the data corresponding to the tuning voltage of the tuning voltage generator is written in the memory device in the write and read modes and for reading thereafter the data in the memory device for providing the same as a tuning voltage to the voltage controlled variable capacitance diode in the preset mode, whereby the preset selection is achieved based on the data as written in and read out from the addressed memory device. Preferably, the data concerning the tuning voltage is divided into a rough tuning voltage and a fine tuning voltage, which are separately stored in separate memory devices. Preferably, the read tuning voltage is once stored in a buffer memory and the tuning voltage in the buffer memory is corrected responsive to an automatic frequency control signal.
    • 一种适于在多个通道中选择预设通道的预设调谐装置,包括调谐器,该调谐器包括具有电压控制的可变电容二极管的调谐电路,用于向压控可变电容二极管提供调谐电压的手动调节调谐电压发生器, 包括多个浮动栅型场效应存储器件的非易失性模拟存储器,频带选择开关,预设选择开关,预设存储器开关,耦合到频带选择的寻址电路和预置选择开关,用于寻址 多个存储器件,擦除/写入/读取电压发生器和耦合到擦除/写入/读取电压发生器的模式控制,并响应于频带选择,预设选择和预设存储器开关,用于交替地和重复地写入和读取 在寻址的存储设备中的模拟值,直到对应于调谐卷的数据 调谐电压发生器的刻度以写入和读取模式写入存储器件中,然后读取存储器件中的数据,以便在预置模式下向调压电压提供与压控可变电容二极管相同的数据,由此, 基于从寻址的存储器件写入和读出的数据来实现预设选择。 优选地,关于调谐电压的数据被分为粗调谐电压和微调电压,它们分别存储在分开的存储器件中。 优选地,读取调谐电压一次存储在缓冲存储器中,并且响应于自动频率控制信号来校正缓冲存储器中的调谐电压。