PLL circuit for generating output signal synchronized with input signal
by switching frequency dividing ratio
    1.
    发明授权
    PLL circuit for generating output signal synchronized with input signal by switching frequency dividing ratio 失效
    PLL电路,用于通过切换分频比产生与输入信号同步的输出信号

    公开(公告)号:US4870684A

    公开(公告)日:1989-09-26

    申请号:US271883

    申请日:1988-11-15

    IPC分类号: H03D1/22 H03L7/099

    CPC分类号: H03D1/2236 H03L7/0992

    摘要: A PLL circuit comprises a variable frequency divider (7) for frequency-dividing a signal having a reference frequency f.sub.1 with a frequency dividing ratio n.sub.1 or n.sub.2, a fixed frequency divider (8) for further frequency-dividing an output of the variable frequency divider with a frequency dividing ratio n.sub.0, to generate a first output signal and a second output signal which is out of phase by 90.degree. from the first output signal, multiplier (10) for multiplying an input signal by the second output signal, a comparator (11) for comparing an output of the multiplier with a predetermined reference voltage, and a D-type flip-flop (12) receiving as a D input an output of the comparator and receiving as a clock input the first output signal, an output of the D-type flip-flop (12) being applied to the variable frequency divider (7). When the second output signal leads the input signal by 90.degree. or more, the output of the D-type flip-flop (12) attains an "L" level, so that the large frequency dividing ratio n.sub.2 is selected. On the other hand, when the second output signal lags the input signal by 90.degree. or more, the output of the D-type flip-flop (12) attains an "H" level, so that the small frequency dividing ratio n.sub.1 is selected.

    FMX stereophonic broadcast receiver
    2.
    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
    3.
    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
    4.
    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.

    OPTICAL PICKUP APPARATUS, INTEGRATED CIRCUIT, AND METHOD FOR CONTROLLING LASER OUTPUT OF OPTICAL PICKUP APPARATUS
    5.
    发明申请
    OPTICAL PICKUP APPARATUS, INTEGRATED CIRCUIT, AND METHOD FOR CONTROLLING LASER OUTPUT OF OPTICAL PICKUP APPARATUS 有权
    光学拾取装置,集成电路和控制光学拾取装置的激光输出的方法

    公开(公告)号:US20120236887A1

    公开(公告)日:2012-09-20

    申请号:US13422242

    申请日:2012-03-16

    IPC分类号: H01S3/10

    摘要: An optical-pickup apparatus includes: a first laser light source including a first laser diode to emit a laser beam having a first wavelength, and a back-monitor photodetector to receive the laser beam emitted in a backward direction, not being an optical-disc direction, and output a first monitor signal; a second laser-light source including a second laser diode to emit a laser beam having a second wavelength; a light-receiving circuit including a front-monitor photodetector to receive the laser beam emitted in a forward direction, being the optical-disc direction, and output a second monitor signal, and a switch circuit to be inputted with the first and second monitor signals, and output the first or second monitor signal according to a switch signal; and first and second drive circuits to drive the first and second laser diodes according to the first and second monitor signals outputted from the light-receiving circuit, respectively.

    摘要翻译: 一种光拾取装置,包括:第一激光源,包括发射具有第一波长的激光束的第一激光二极管和用于接收沿反向发射的激光束的后监视器光检测器,不是光盘 方向,并输出第一监视信号; 包括第二激光二极管以发射具有第二波长的激光束的第二激光光源; 光接收电路,包括用于接收沿正向发射的激光束的前监视器光电检测器,作为光盘方向,并输出第二监视信号;以及开关电路,输入第一和第二监视信号 并根据开关信号输出第一或第二监视信号; 以及分别根据从光接收电路输出的第一和第二监视信号来驱动第一和第二激光二极管的第一和第二驱动电路。

    Automotive air conditioning device
    6.
    发明授权
    Automotive air conditioning device 失效
    汽车空调装置

    公开(公告)号:US5564493A

    公开(公告)日:1996-10-15

    申请号:US356023

    申请日:1994-12-14

    IPC分类号: B60H1/00 G05D23/19 F25B29/00

    摘要: A control system for an automotive air conditioner has an ambient air temperature sensor; a solar radiation quantity sensor; a passenger room temperature sensor; a cooled air temperature sensor; an air-mix door open degree sensor; and a bypass door open degree sensor. The control system further has a first device which, based on information from the ambient air temperature sensor and the solar radiation quantity sensor, derives a first target temperature of air drawn out from an air outlet structure; a second device which, based on the information from the cooled air temperature sensor and the air-mix door open degree sensor, derives a second target temperature of air drawn out from a foot area air duct; and a third device which, based on the information from the cooled air temperature sensor, the first target temperature and the second target temperature, derives a ratio between the amount of air flowing in a bypass passage and that of air blown out from the air outlet structure; and a fourth device which controls the open degree of the bypass door in accordance with the derived ratio.

    摘要翻译: 用于汽车空调的控制系统具有环境空气温度传感器; 太阳辐射量传感器; 客房温度传感器; 冷却空气温度传感器; 空气混合门开度传感器; 和旁路门开度传感器。 所述控制系统还具有:第一装置,其基于来自所述环境空气温度传感器和所述太阳辐射量传感器的信息,求出从出风口结构抽出的空气的第一目标温度; 基于来自冷却空气温度传感器和空气混合门开度传感器的信息的第二装置导出从脚部空气管道抽出的空气的第二目标温度; 以及第三装置,其基于来自冷却空气温度传感器的信息,第一目标温度和第二目标温度,导出在旁路通路中流动的空气量与从出气口吹出的空气的比率 结构体; 以及第四装置,其根据导出比控制旁路门的开度。

    Integrated circuit for optical disc
    8.
    发明授权
    Integrated circuit for optical disc 有权
    光盘集成电路

    公开(公告)号:US08000182B2

    公开(公告)日:2011-08-16

    申请号:US11863019

    申请日:2007-09-27

    IPC分类号: G11B7/00

    CPC分类号: G11B7/13

    摘要: An integrated circuit for optical disc comprising for each of light-receiving surfaces: an operational amplifier including inverting and noninverting input terminals receiving first and second input voltages, and output terminal receiving output voltage; a feedback resistor connected between the inverting input and output terminals; a photodiode connected between one power supply line of the first and second power supply lines and the inverting input terminal to generate current corresponding to reflected light; a capacitor connected between the one power supply line and the noninverting input terminal; and an input resistor connected between reference power source and the noninverting input terminal, further comprising: an adder adding voltages corresponding to the output voltages to generate RF signal, capacitance of the capacitor and resistance value of the input resistor being determined in accordance with capacitance of parasitic capacitor connected in parallel with the photodiode and resistance value of the feedback resistor.

    摘要翻译: 一种用于光盘的集成电路,包括用于光接收表面的每一个;运算放大器,包括接收第一和第二输入电压的反相和同相输入端,以及输出端接收输出电压; 连接在反相输入和输出端子之间的反馈电阻器; 连接在第一和第二电源线的一个电源线和反相输入端之间的光电二极管,以产生对应于反射光的电流; 连接在所述一个电源线和所述同相输入端子之间的电容器; 以及连接在参考电源和同相输入端之间的输入电阻器,还包括:加法器,相应于所述输出电压产生RF信号,所述电容器的电容值和所述输入电阻器的电阻值根据 寄生电容与光电二极管并联,反馈电阻的电阻值。

    Integrated Circuit for Optical Disc
    10.
    发明申请
    Integrated Circuit for Optical Disc 有权
    光盘集成电路

    公开(公告)号:US20080080331A1

    公开(公告)日:2008-04-03

    申请号:US11863019

    申请日:2007-09-27

    IPC分类号: G11B7/00

    CPC分类号: G11B7/13

    摘要: An integrated circuit for optical disc comprising for each of light-receiving surfaces: an operational amplifier including inverting and noninverting input terminals receiving first and second input voltages, and output terminal receiving output voltage; a feedback resistor connected between the inverting input and output terminals; a photodiode connected between one power supply line of the first and second power supply lines and the inverting input terminal to generate current corresponding to reflected light; a capacitor connected between the one power supply line and the noninverting input terminal; and an input resistor connected between reference power source and the noninverting input terminal, further comprising: an adder adding voltages corresponding to the output voltages to generate RF signal, capacitance of the capacitor and resistance value of the input resistor being determined in accordance with capacitance of parasitic capacitor connected in parallel with the photodiode and resistance value of the feedback resistor.

    摘要翻译: 一种用于光盘的集成电路,包括用于光接收表面的每一个;运算放大器,包括接收第一和第二输入电压的反相和同相输入端,以及输出端接收输出电压; 连接在反相输入和输出端子之间的反馈电阻器; 连接在第一和第二电源线的一个电源线和反相输入端之间的光电二极管,以产生对应于反射光的电流; 连接在所述一个电源线和所述同相输入端子之间的电容器; 以及连接在参考电源和同相输入端之间的输入电阻器,还包括:加法器,相应于所述输出电压产生RF信号,所述电容器的电容值和所述输入电阻器的电阻值根据 寄生电容与光电二极管并联,反馈电阻的电阻值。