FMX stereophonic broadcast receiver
    1.
    发明授权
    FMX stereophonic broadcast receiver 失效
    FMX立体声广播接收机

    公开(公告)号:US4864637A

    公开(公告)日:1989-09-05

    申请号:US195106

    申请日:1988-05-16

    IPC分类号: H04B1/16

    CPC分类号: H04B1/1692

    摘要: An improved FMX sterophonic broadcast receiver provided with countermeasures against transient noises, which includes a level detection circuit for detecting level of a detected stereo difference signal, and a level control circuit for controlling level of an expanded stereo difference signal according to an output signal of the level detection circuit. By the above arrangement of the present invention, since it is so arranged to cause the level control circuit to function when the degree of modulation becomes large so as to control the level of the stereo difference signal to be low, a level difference is produced between the stereo sum signal and the stereo difference signal for deterioration of the stereo separation degree upon matrixing at a matrix circuit for reduction of noises accordingly.

    FMX stereophonic receiver
    2.
    发明授权
    FMX stereophonic receiver 失效
    FMX立体声接收机

    公开(公告)号:US4852167A

    公开(公告)日:1989-07-25

    申请号:US143805

    申请日:1988-01-14

    IPC分类号: H03G7/00 H04B1/16

    CPC分类号: H04B1/1692 H03G7/008

    摘要: An FMX stereophonic receiver receives an FMX stereophonic broadcast signal which includes a stereo sum signal, an uncompressed stereo difference signal, and a compressed stereo difference signal which is formed by modulating the uncompressed stereo difference signal by a quadrature modulation and being compressed. The FMX stereophonic receiver includes an FM detector for producing an FM detection signal including a stereo pilot signal, a PLL circuit for producing a signal which is in a synchronized relationship with the stereo pilot signal included in the FM detection signal, a synchronous detection circuit for receiving the FM detection signal and for producing the uncompressed stereo difference signal in accordance with the signal produced from the PLL circuit, a quadrature detection circuit for receiving the FM detection signal and for producing the compressed stereo difference signal in accordance with the signal produced from the PLL circuit, and a phase shifting means for shifting the phase of at least one of the FM detection signal applied to the PLL circuit and the FM detection signal applied to the detection circuits so as to correct the phase difference between the synchronous detection signal and the signal to be detected.

    FM/FMX stereophonic receiver
    3.
    发明授权
    FM/FMX stereophonic receiver 失效
    FM / FMX立体声接收机

    公开(公告)号:US4809328A

    公开(公告)日:1989-02-28

    申请号:US157048

    申请日:1988-02-16

    IPC分类号: H04B1/16 H04H5/00

    CPC分类号: H04B1/1692

    摘要: An FM/FMX stereophonic receiver is capable of receiving an FM or an FMX stereophonic broadcast signal. The FM stereophonic broadcast signal includes a stereo sum signal and stereo difference signal, whereas the FMX stereophonic broadcast signal further includes a compressed stereo difference signal and an FMX ID signal indicating the FMX stereophonic broadcast signal. The FM/FMX stereophonic receiver has a stereo demodulator for receiving said broadcast signal and for producing left and right stereo signals, a detector for detecting the field strength of the receiving signal, and a noise reducer, which may be a circuit for changing the mode from stereophonic mode to monaural mode or a high cut circuit for attenuating the signals of high frequency region, for reducing noise signals contained in the left and right stereo signals. The FM/FMX stereophonic receiver further has a detector for detecting the FMX ID signal and a disabling circuit for disabling the noise reducer when the FMX ID signal is detected by the detector. Instead of the disabling circuit, a timing control circuit may be provided for changing the timing at which the noise reducer starts to activate in response to the detection of the FMX ID signal.

    Demodulating circuit for controlling stereo separation
    4.
    发明授权
    Demodulating circuit for controlling stereo separation 失效
    用于控制立体声分离的解调电路

    公开(公告)号:US4399325A

    公开(公告)日:1983-08-16

    申请号:US212206

    申请日:1980-12-02

    CPC分类号: H04H40/72 H04B1/1676

    摘要: A demodulating circuit is capable of controlling stereo separation as a function of an electric field strength. An intermediate frequency signal not limited obtained from an intermediate frequency circuit is utilized as a signal representative of the level associated with the electric field strength. Stereo separation is discontinuously controlled as a function of the signal representative of the electric field strength. The separation is maintained in the possible maximum value in the region exceeding a predetermined value of the electric field strength but is abruptly decreased to a given value between a stereo state and a monaural state from the above described maximum value (stereo state) when the electric field strength becomes smaller than the above described predetermined value and the separation is changed as a function of the electric field strength in the region smaller than the above described value of the electric field strength.

    摘要翻译: 解调电路能够控制立体声分离作为电场强度的函数。 利用从中频电路获得的不受限制的中频信号作为代表与电场强度相关联的电平的信号。 作为代表电场强度的信号的函数,不连续地控制立体分离。 在超过电场强度的预定值的区域中,分离保持在可能的最大值中,但是当电气强度从上述最大值(立体声状态)时,从立体声状态和单声道状态突然降低到给定值 场强变得小于上述预定值,并且在小于上述电场强度值的区域中,分离作为电场强度的函数而改变。

    Frequency synthesizer for transmitter receiver using a phase locked loop
    5.
    发明授权
    Frequency synthesizer for transmitter receiver using a phase locked loop 失效
    使用锁相环的发射机接收机频率合成器

    公开(公告)号:US4149125A

    公开(公告)日:1979-04-10

    申请号:US746707

    申请日:1976-12-02

    CPC分类号: H03L7/191 H04B1/405

    摘要: A frequency synthesizer for use in a transmitter/receiver, comprising a voltage controlled oscillator, a programmable frequency divider for dividing the frequency of the output from the voltage controlled oscillator, a reference oscillator, a reference counter for dividing the frequency of the output from the reference oscillator, a phase detector for phase detecting the frequencies of the reference counter and the frequency divider for providing a control voltage to said voltage controlled oscillator, a transmitting/receiving mode selection circuit for selectively controlling the programmable frequency divider such that the frequency division rate thereof is different in the transmitting and receiving modes, a channel designating circuit, a first output terminal for withdrawing an output by mixing the output from the voltage controlled oscillator with the output from the reference oscillator, and a second output terminal for directly withdrawing the output from the voltage controlled oscillator, said transmitting/receiving mode selection circuit comprising a transmitter/receiver selection switch, and full adder means or a read only memory for storing in advance information concerning the frequency division rate of the frequency divider based on the output from the transmitter/receiver selection switch and the output from the channel designating circuit.

    摘要翻译: 一种用于发射机/接收机的频率合成器,包括压控振荡器,用于分压来自压控振荡器的输出频率的可编程分频器,参考振荡器,用于将输出频率从 参考振荡器,用于相位检测参考计数器和分频器的频率的相位检测器,用于向所述压控振荡器提供控制电压;发射/接收模式选择电路,用于选择性地控制可编程分频器,使得分频率 其在发送和接收模式下是不同的,通道指定电路,用于通过将来自压控振荡器的输出与来自参考振荡器的输出进行混合来提取输出的第一输出端和用于直接抽出输出的第二输出端 从电压控制 振荡器,所述发送/接收模式选择电路包括发送器/接收器选择开关,以及全加器装置或只读存储器,用于基于发送器/接收器选择的输出预先存储关于分频器的分频率的信息 开关和通道指定电路的输出。

    Method and apparatus for detecting a reduction in the degree of vacuum
of a vacuum valve while in operation
    7.
    发明授权
    Method and apparatus for detecting a reduction in the degree of vacuum of a vacuum valve while in operation 失效
    用于检测在操作中真空阀真空度降低的方法和装置

    公开(公告)号:US5399973A

    公开(公告)日:1995-03-21

    申请号:US38200

    申请日:1993-03-26

    CPC分类号: H01H33/668 G01R31/3275

    摘要: An improved vacuum valve including an insulating container and an arc shield held in the insulating container, wherein a protrusion is formed on either the outer cylindrical surface of the arc shield or on the inner surface of the container. A detecting electrode is set confronted with the outer surface of the insulating container with an air gap therebetween, and is grounded through a current sensor. The current sensor detects a discharge current which is induced through the protrusion when the degree of vacuum of the vacuum valve is reduced, to output a detection signal. In response to the detection signal, a signal processing unit outputs an alarm signal indicating the reduction in the degree of vacuum of the vacuum valve. Thus, while the vacuum valve is in operation, its vacuum reduction can be positively detected with the vacuum valve maintained unchanged in reliability.

    摘要翻译: 一种改进的真空阀,包括保持在绝缘容器中的绝缘容器和电弧屏蔽,其中在电弧屏蔽的外圆柱形表面或容器的内表面上形成突起。 检测电极与绝缘容器的外表面相对设置,其间具有气隙,并且通过电流传感器接地。 当真空阀的真空度降低时,电流传感器检测通过突起引起的放电电流,以输出检测信号。 响应于检测信号,信号处理单元输出表示真空阀的真空度的降低的报警信号。 因此,当真空阀正在运行时,真空阀的真空度可以保持在可靠性上保持不变。

    Method of manufacturing circuit device using a communication network
    8.
    发明授权
    Method of manufacturing circuit device using a communication network 失效
    使用通信网络制造电路装置的方法

    公开(公告)号:US07093210B2

    公开(公告)日:2006-08-15

    申请号:US10674897

    申请日:2003-09-30

    IPC分类号: G06F17/50 H03K17/693

    摘要: A method of manufacturing a System In Package (SIP) or Integrated System in Board (ISB) circuit device in which a plurality of circuit elements are covered with and integrally supported by an insulating resin. A user terminal is connected with an ISB server and an ISB mounting factory through a communication network. Specifications to be satisfied by an ISB circuit device desired by a user, such as an external size and terminal information of the ISB and circuit diagram CAD data, for example, are input through the user terminal and transmitted to the ISB server. The ISB server in turn transmits information concerning the due date and cost of the ISB circuit device and also a reliability evaluation result to the user terminal. The ISB server also generates mask data for manufacturing the ISB circuit device based on the input specifications, and transmits the mask data to the ISB mounting factory. The ISB mounting factory, receiving the manufacturing data from the ISB server, manufactures the ISB circuit device and provides the ISB circuit device to the user.

    摘要翻译: 一种制造系统级封装(SIP)或集成式板上系统(ISB)电路装置的方法,其中多个电路元件被绝缘树脂覆盖并整体支撑。 用户终端通过通信网络与ISB服务器和ISB安装工厂连接。 通过用户终端输入用户所希望的ISB电路装置(例如外部尺寸和ISB的终端信息,电路图CAD数据)满足的规格,并发送给ISB服务器。 ISB服务器又将关于ISB电路设备的到期日和成本的信息以及可靠性评估结果发送给用户终端。 ISB服务器还根据输入规格生成用于制造ISB电路设备的掩码数据,并将掩码数据发送到ISB安装工厂。 接收来自ISB服务器的制造数据的ISB安装工厂生产ISB电路设备,并向用户提供ISB电路设备。