Oscillator
    1.
    发明授权
    Oscillator 有权
    振荡器

    公开(公告)号:US07301409B2

    公开(公告)日:2007-11-27

    申请号:US11346149

    申请日:2006-02-03

    Abstract: In the current-controlled oscillator performing an oscillation frequency control by using a differential amplifier circuit, resistors are inserted to each current path of a differential pair of the differential amplifier circuit, and thereby an inclination of output currents Ia, Ib of a differential pair is small in the linear line region. Further, by setting a reference voltage applied to a base of a transistor of one side of the differential pair lowly, the linear region is shifted to low voltage side, and thereby a saturation region of the low voltage side is not occurred. Moreover, when a comparison result of a phase of an output signal of the current-controlled oscillation circuit and a reference signal is converted to an oscillation frequency control voltage Vtune, by limiting an upper limit voltage of the Vtune by an output of a regulator in stead of a positive voltage power source Vcc of common circuit, the Vtune does not move to a saturation region upper than the linear region. According to the current-controlled oscillator, it is possible to prevent deterioration of a phase noise characteristic or deadlock caused by an inclination or a width of the linear region of the output characteristic of the differential amplifier circuit.

    Abstract translation: 在通过使用差分放大器电路进行振荡频率控制的电流控制振荡器中,电阻器被插入到差分放大器电路的差分对的每个电流路径上,从而差分对的输出电流Ia,Ib的倾斜为 线性线区域较小。 此外,通过将差分对的一侧的晶体管的基极施加的基准电压设置为低电平,将线性区域移动到低电压侧,从而不发生低电压侧的饱和区域。 此外,当将电流控制振荡电路的输出信号的相位和参考信号的相位的比较结果转换为振荡频率控制电压V调谐时,通过限制电压控制振荡电路的上限电压 通过调节器的输出代替公共电路的正电压电源V SUB调谐,V调谐不移动到 饱和区域高于线性区域。 根据电流控制振荡器,可以防止由差分放大器电路的输出特性的线性区域的倾斜或宽度引起的相位噪声特性或死锁的劣化。

    Bi-directional transmitter/receiver system and bi-directional transmitter/receiver
    2.
    发明授权
    Bi-directional transmitter/receiver system and bi-directional transmitter/receiver 有权
    双向发射机/接收机系统和双向发射机/接收机

    公开(公告)号:US06636550B1

    公开(公告)日:2003-10-21

    申请号:US09218673

    申请日:1998-12-22

    CPC classification number: H04B1/7075 H04B1/76

    Abstract: To ensure establishment of synchronization and data demodulation among a number of transmitter/receivers using a spread spectrum method. Specifically, in a normal communication state, a second transmitter/receiver sends transmission data including a pilot carrier and a communication carrier. Receiving the transmission data, a first transmitter/receiver establishes synchronization between a spread code contained in the received spread spectrum signal and its own generated spread code, based on dummy data received during a pilot carrier period, and maintains the established synchronization. Thereafter, the first transmitter/receiver digitally demodulates data in the communication carrier. The resultant data is subjected to decoding and analog conversion to be converted into an audio signal. A control data is derived from the digitally demodulated data, and used to control the operation of the first transmitter/receiver. With this arrangement, synchronization is established between a received spread spectrum code and generated spread spectrum code, and then a communication carrier period starts. This makes it possible to ensure establishment of synchronization and data demodulation despite a longer time necessary for a receiver/transmitter employing a spread spectrum method to establish synchronization for spread spectrum codes.

    Abstract translation: 确保使用扩频方法在多个发射机/接收机之间建立同步和数据解调。 具体地说,在正常通信状态下,第二发送接收器发送包括导频载波和通信载波的发送数据。 接收传输数据,第一发射机/接收机基于在导频载波周期期间接收到的伪数据,建立在接收的扩展频谱信号中包含的扩展码与其自己产生的扩展码之间的同步,并保持建立的同步。 此后,第一发射机/接收机对通信载波中的数据进行数字解调。 对所得数据进行解码和模拟转换以转换成音频信号。 从数字解调数据导出控制数据,并用于控制第一发射机/接收机的操作。 利用这种布置,在接收的扩展频谱码和生成的扩频码之间建立同步,然后开始通信载波周期。 这使得可以确保建立同步和数据解调,尽管采用扩频方法的接收机/发射机需要更长的时间来建立扩频码的同步。

    Oscillator
    5.
    发明申请
    Oscillator 有权
    振荡器

    公开(公告)号:US20060176118A1

    公开(公告)日:2006-08-10

    申请号:US11346149

    申请日:2006-02-03

    Abstract: In the current-controlled oscillator performing an oscillation frequency control by using a differential amplifier circuit, resistors are inserted to each current path of a differential pair of the differential amplifier circuit, and thereby an inclination of output currents Ia, Ib of a differential pair is small in the linear line region. Further, by setting a reference voltage applied to a base of a transistor of one side of the differential pair lowly, the linear region is shifted to low voltage side, and thereby a saturation region of the low voltage side is not occurred. Moreover, when a comparison result of a phase of an output signal of the current-controlled oscillation circuit and a reference signal is converted to an oscillation frequency control voltage Vtune, by limiting an upper limit voltage of the Vtune by an output of a regulator in stead of a positive voltage power source Vcc of common circuit, the Vtune does not move to a saturation region upper than the linear region. According to the current-controlled oscillator, it is possible to prevent deterioration of a phase noise characteristic or deadlock caused by an inclination or a width of the linear region of the output characteristic of the differential amplifier circuit.

    Abstract translation: 在通过使用差分放大器电路进行振荡频率控制的电流控制振荡器中,电阻器被插入到差分放大器电路的差分对的每个电流路径上,从而差分对的输出电流Ia,Ib的倾斜为 线性线区域较小。 此外,通过将差分对的一侧的晶体管的基极施加的基准电压设置为低电平,将线性区域移动到低电压侧,从而不发生低电压侧的饱和区域。 此外,当将电流控制振荡电路的输出信号的相位和参考信号的相位的比较结果转换为振荡频率控制电压V调谐时,通过限制电压控制振荡电路的上限电压 通过调节器的输出代替公共电路的正电压电源V SUB调谐,V调谐不移动到 饱和区域高于线性区域。 根据电流控制振荡器,可以防止由差分放大器电路的输出特性的线性区域的倾斜或宽度引起的相位噪声特性或死锁的劣化。

    OPTICAL PICKUP APPARATUS, INTEGRATED CIRCUIT, AND METHOD FOR CONTROLLING LASER OUTPUT OF OPTICAL PICKUP APPARATUS
    6.
    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

    Abstract: 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.

    Abstract translation: 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。

    Optical pickup apparatus, integrated circuit, and method for controlling laser output of optical pickup apparatus
    7.
    发明授权
    Optical pickup apparatus, integrated circuit, and method for controlling laser output of optical pickup apparatus 有权
    光拾取装置,集成电路和控制光拾取装置的激光输出的方法

    公开(公告)号:US08427917B2

    公开(公告)日:2013-04-23

    申请号:US13422242

    申请日:2012-03-16

    Abstract: 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.

    Abstract translation: 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。

Patent Agency Ranking