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    周波数混合回路
    41.
    发明专利
    周波数混合回路 审中-公开

    公开(公告)号：JPWO2003003561A1

    公开(公告)日：2004-10-21

    申请号：JP2003509622

    申请日：2002-06-26

    Applicant: 新潟精密株式会社

    Inventor： 宮城　弘 ,  弘 宮城

    IPC: H03D7/12 ,  H03D7/00 ,  H03D7/14 ,  H04B1/26

    CPC classification number: H03D7/1441 ,  H03D7/1458 ,  H03D7/1483

    Abstract: CMOSプロセスあるいはMOSプロセスを用いて半導体基板上に一体成形した場合に発生する低周波ノイズを低減することができる周波数混合回路を提供することを目的とする。FM受信機を構成する高周波増幅回路11、混合回路12、局部発振器13、中間周波フィルタ14、16、中間周波増幅器15、リミット回路17、FM検波回路18、ステレオ復調回路19が1チップ部品10として形成されている。混合回路12は、CMOSプロセスあるいはMOSプロセスを用いて半導体基板上に形成されており、回路を構成するトランジスタはpチャネル型のFETが用いられている。

    Receiver
    43.
    发明专利
    Receiver 有权

    公开(公告)号：JP2004153435A

    公开(公告)日：2004-05-27

    申请号：JP2002314642

    申请日：2002-10-29

    Applicant: Niigata Seimitsu Kk ,  Toyota Industries Corp ,  新潟精密株式会社 ,  株式会社豊田自動織機

    Inventor： MIYAGI HIROSHI ,  FURUIKE TAKESHI

    IPC: H04B17/00

    CPC classification number: H04B17/20

    Abstract: PROBLEM TO BE SOLVED: To provide a receiver capable of eliminating the necessity of complicated connection for an operation test, reducing a test time, and simplifying a device configuration. SOLUTION: An output signal of an oscillator 21 used for generating a reference signal inputted into a PLL circuit 20 connected to a local oscillator 13 is divided by a frequency divider 24, thereby generating a test signal included in the receiving band of an AM broadcast. This test signal is inputted into a high-frequency amplifier circuit 11 via a switch 25, and an intermediate frequency signal for the test signal is inputted into a level detection unit 30. If the AM receiver operates properly, an output level of a voltage comparator 31 becomes a high level. COPYRIGHT: (C)2004,JPO

    Receiver, digital-analog converter, and tuning circuit
    44.
    发明专利
    Receiver, digital-analog converter, and tuning circuit 有权

    公开(公告)号：JP2004153434A

    公开(公告)日：2004-05-27

    申请号：JP2002314641

    申请日：2002-10-29

    Applicant: Niigata Seimitsu Kk ,  Toyota Industries Corp ,  新潟精密株式会社 ,  株式会社豊田自動織機

    Inventor： MIYAGI HIROSHI ,  KATO ISAMI

    IPC: H04B1/26 ,  H03J1/00 ,  H03J3/04 ,  H04B1/18 ,  H04B1/28

    CPC classification number: H04B1/28 ,  H03J1/005

    Abstract: PROBLEM TO BE SOLVED: To provide a receiver in which component costs can be reduced and a component for temperature compensation can be formed on a semiconductor substrate, and to provide a digital-analog converter and a tuning circuit.
    SOLUTION: The FM receiver 100 is constituted so as to include an antenna 1, high-frequency receiving circuit 2, local oscillator 3, two DACs 4, 6, control unit 8, mixer circuit 9, intermediate frequency amplifier circuit 10, detection circuit 11, low-frequency amplifier circuit 12, and a speaker 13. The DACs 4, 6 have a predetermined temperature coefficient, and their output voltages vary depending on a change in ambient temperature. When the characteristic of a VCO 31 changes together with the change in ambient temperature and a control voltage applied to this VCO 31 changes, output voltages of the DACs 4, 6 also change.
    COPYRIGHT: (C)2004,JPO

    Separation adjusting circuit
    48.
    发明专利
    Separation adjusting circuit 有权
    分离调整电路

    公开(公告)号：JP2004048415A

    公开(公告)日：2004-02-12

    申请号：JP2002203585

    申请日：2002-07-12

    Applicant: Niigata Seimitsu Kk ,  Toyota Industries Corp ,  新潟精密株式会社 ,  株式会社豊田自動織機

    Inventor： FURUIKE TAKESHI ,  MIYAGI HIROSHI

    IPC: H04B1/16 ,  H04H1/00 ,  H04H40/45 ,  H04H40/63 ,  H04H5/00

    CPC classification number: H04B1/1676 ,  H04B1/1646 ,  H04B1/1661 ,  H04H40/63

    Abstract: PROBLEM TO BE SOLVED: To provide a separation adjusting circuit capable of easily adjusting the strength rate of composite signals without providing many external components.
    SOLUTION: The current capacity of currents running through a transistor 23(first adjusting means) of a current mirror circuit which fetches an L/R composite signal from a stereo-composite signal is adjusted based on a control signal generated by a control circuit 25(generating means).
    COPYRIGHT: (C)2004,JPO

    Abstract translation: 要解决的问题：提供一种能够容易地调整复合信号的强度率而不提供许多外部组件的分离调节电路。 解决方案：根据由控制信号产生的控制信号，调节从立体声复合信号中取出L / R复合信号的电流镜电路的晶体管23（第一调节装置）的电流的电流容量 电路25（发生装置）。 版权所有（C）2004，JPO

    Agc circuit
    49.
    发明专利
    Agc circuit 审中-公开
    AGC电路

    公开(公告)号：JP2003324328A

    公开(公告)日：2003-11-14

    申请号：JP2002131693

    申请日：2002-05-07

    Applicant: Niigata Seimitsu Kk ,  Toyota Industries Corp ,  新潟精密株式会社 ,  株式会社豊田自動織機

    Inventor： FURUIKE TAKESHI ,  MIYAGI HIROSHI

    IPC: H03G3/30

    CPC classification number: H03G3/30

    Abstract: PROBLEM TO BE SOLVED: To provide an AGC circuit which performs stable gain control.
    SOLUTION: A gain control voltage VAGC for controlling the gain of a variable gain amplifier 11 and a reference voltage VREF are compared with each other and when the gain control voltage VAGC is larger than the reference voltage VREF, the gain control voltage VAGC inputted to the variable gain amplifier 11 is switched to the reference voltage VREF.
    COPYRIGHT: (C)2004,JPO

    Abstract translation: 要解决的问题：提供一种执行稳定增益控制的AGC电路。 解决方案：将用于控制可变增益放大器11和基准电压VREF的增益的增益控制电压VAGC彼此进行比较，并且当增益控制电压VAGC大于参考电压VREF时，增益控制电压VAGC 输入到可变增益放大器11的电压切换到参考电压VREF。 版权所有（C）2004，JPO

    Receiver
    50.
    发明专利
    Receiver 审中-公开
    接收器

    公开(公告)号：JP2003289264A

    公开(公告)日：2003-10-10

    申请号：JP2002091835

    申请日：2002-03-28

    Applicant: Niigata Seimitsu Kk ,  Toyota Industries Corp ,  新潟精密株式会社 ,  株式会社豊田自動織機

    Inventor： MIYAGI HIROSHI

    IPC: H03H11/04 ,  H03D3/00 ,  H03H11/12 ,  H03H19/00 ,  H04B1/30

    CPC classification number: H04B1/30 ,  H03D3/007 ,  H03H19/004

    Abstract: PROBLEM TO BE SOLVED: To provide a receiver adjustable to various reception signal bands with ease, and suitable for semiconductor integration.
    SOLUTION: The receiver which directly converts a reception signal into a base band signal, comprises a switched capacitor filter in which a cut-off frequency for filtering the base band signal is controlled based on a control signal provided to a switched capacitor element, an oscillator for generating a cyclic signal, and a frequency divider for dividing the cyclic signal generated by the oscillator based on the reception signal. In this receiver, the output signal from the divider is provided to the switched capacitor element as the control signal.
    COPYRIGHT: (C)2004,JPO

    Abstract translation: 要解决的问题：提供可容易地适应于各种接收信号频带的接收机，并且适合于半导体集成。 解决方案：将接收信号直接转换为基带信号的接收机包括开关电容滤波器，其中基于提供给开关电容器元件的控制信号来控制用于滤波基带信号的截止频率 ，用于产生循环信号的振荡器，以及用于根据接收信号分频由振荡器产生的循环信号的分频器。 在该接收机中，来自分频器的输出信号作为控制信号提供给开关电容器元件。 版权所有（C）2004，JPO

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