Receiver capable of reducing local oscillation leakage and in-phase/quadrature-phase (I/Q) mismatch and an adjusting method thereof
    11.
    发明申请
    Receiver capable of reducing local oscillation leakage and in-phase/quadrature-phase (I/Q) mismatch and an adjusting method thereof 有权
    能够减少本地振荡泄漏和同相/正交相(I / Q)失配的接收器及其调整方法

    公开(公告)号:US20090088117A1

    公开(公告)日:2009-04-02

    申请号:US12286107

    申请日:2008-09-25

    Abstract: An adjusting method for reducing local oscillation leakage or I/Q mismatch in a receiver includes the steps of: (a) detecting a current extent of local oscillation leakage or I/Q mismatch; (b) determining if an adjusting direction is correct with reference to the current extent of local oscillation leakage or I/Q mismatch thus detected, maintaining the adjusting direction if correct, and reversing the adjusting direction upon determining that the adjusting direction is incorrect; and (c) adjusting a control signal according to the adjusting direction.

    Abstract translation: 用于减少接收机中局部振荡泄漏或I / Q不匹配的调整方法包括以下步骤:(a)检测当前的本地振荡泄漏或I / Q失配的程度; (b)参照当前的本地振荡泄漏程度或如此检测到的I / Q失配来确定调整方向是否正确,如果正确则保持调节方向,并在确定调节方向不正确时反转调节方向; 和(c)根据调整方向调整控制信号。

    LOW NOISE AMPLIFIER AND LOW NOISE AMPLIFYING METHOD
    12.
    发明申请
    LOW NOISE AMPLIFIER AND LOW NOISE AMPLIFYING METHOD 有权
    低噪声放大器和低噪声放大方法

    公开(公告)号:US20070229164A1

    公开(公告)日:2007-10-04

    申请号:US11687671

    申请日:2007-03-19

    CPC classification number: H03G1/0088 H03G1/0029

    Abstract: A low noise amplifier for operating in response to different gain modes is disclosed. The low noise amplifier includes a voltage adjusting circuit, which provides a first bias voltage at a first gain mode and provides a second bias voltage at a second gain mode, where the second bias voltage is different from the first bias voltage; and an amplifying circuit coupled to the voltage adjusting circuit, for providing a first transfer characteristic according to the first bias voltage during the first gain mode in order to amplify an input signal to generate an output signal, and for providing a second transfer characteristic according to the second bias voltage during the second gain mode in order to amplify the input signal to generate the output signal.

    Abstract translation: 公开了一种用于响应不同增益模式工作的低噪声放大器。 低噪声放大器包括电压调节电路,其提供第一增益模式的第一偏置电压,并在第二增益模式提供第二偏置电压,其中第二偏置电压不同于第一偏置电压; 以及耦合到所述电压调节电路的放大电路,用于在所述第一增益模式期间根据所述第一偏置电压提供第一传输特性,以便放大输入信号以产生输出信号,并且用于根据所述第一传输特性提供根据 在第二增益模式期间的第二偏置电压,以便放大输入信号以产生输出信号。

    LOW NOISE MIXER
    13.
    发明申请
    LOW NOISE MIXER 有权
    低噪音混合器

    公开(公告)号:US20070142018A1

    公开(公告)日:2007-06-21

    申请号:US11567222

    申请日:2006-12-06

    CPC classification number: H03D7/1441 H03D7/1433 H03D7/1458 H03D2200/0084

    Abstract: Disclosed is a mixer comprising: a switching circuit, having a first pair of differential signal nodes and a second pair of differential signal nodes, for switching according to a local oscillation signal; an amplifying stage circuit, for receiving an input signal and amplifying the input signal; a load circuit, for serving as the loading of the mixer and generating an output signal of the mixer; a common-mode feedback circuit, for receiving the output signal and generating a feedback signal according to the output signal; a first current source, for receiving the feedback signal and generating a first current according to the feedback signal; and a second current source, for receiving the feedback signal and generating a second current according to the feedback signal.

    Abstract translation: 公开了一种混频器,包括:开关电路,具有第一对差分信号节点和第二对​​差分信号节点,用于根据本地振荡信号进行切换; 放大级电路,用于接收输入信号并放大输入信号; 负载电路,用作混频器的负载并产生混频器的输出信号; 共模反馈电路,用于接收输出信号并根据输出信号产生反馈信号; 第一电流源,用于接收所述反馈信号并根据所述反馈信号产生第一电流; 和第二电流源,用于接收反馈信号并根据反馈信号产生第二电流。

    Transmitter capable of reducing local oscillation leakage and in-phase/quadrature-phase (I/Q) mismatch and adjusting methods thereof
    15.
    发明授权
    Transmitter capable of reducing local oscillation leakage and in-phase/quadrature-phase (I/Q) mismatch and adjusting methods thereof 有权
    能够减少本地振荡泄漏和同相/正交相位(I / Q)失配的发射器及其调整方法

    公开(公告)号:US09490858B2

    公开(公告)日:2016-11-08

    申请号:US12237827

    申请日:2008-09-25

    Abstract: An adjusting method for reducing local oscillation leakage or I/Q mismatch in a transmitter includes the steps of: (a) detecting a current extent of local oscillation leakage or I/Q mismatch; (b) determining if an adjusting direction is correct with reference to the current extent of local oscillation leakage or I/Q mismatch thus detected, maintaining the adjusting direction if correct, and reversing the adjusting direction upon determining that the adjusting direction is incorrect; and (c) adjusting a control signal according to the adjusting direction.

    Abstract translation: 用于减少发射机中本地振荡泄漏或I / Q失配的调节方法包括以下步骤:(a)检测当前振荡泄漏或I / Q失配的程度; (b)参照当前的本地振荡泄漏程度或如此检测到的I / Q失配来确定调整方向是否正确,如果正确则保持调节方向,并在确定调节方向不正确时反转调节方向; 和(c)根据调整方向调整控制信号。

    SIGNAL CONVERTING CIRCUIT CAPABLE OF REDUCING/AVOIDING SIGNAL LEAKAGE AND RELATED SIGNAL CONVERTING METHOD
    16.
    发明申请
    SIGNAL CONVERTING CIRCUIT CAPABLE OF REDUCING/AVOIDING SIGNAL LEAKAGE AND RELATED SIGNAL CONVERTING METHOD 有权
    信号转换电路,减少/避免信号泄漏及相关信号转换方法

    公开(公告)号:US20140049441A1

    公开(公告)日:2014-02-20

    申请号:US13612851

    申请日:2012-09-13

    CPC classification number: H01Q1/50

    Abstract: A signal converting circuit includes: a first switching circuit; a second switching circuit; and a first balance-unbalance circuit (Balun) having a first signal terminal coupled to an antenna, a second signal terminal coupled to the first switching circuit, and a third signal terminal coupled to the second switching circuit; wherein when the first balance-unbalance circuit operates in a first signal converting mode, the first switching circuit and the second switching circuit are arranged to couple the second signal terminal and the third signal terminal, respectively, to a first signal processing circuit, and when the first balance-unbalance circuit does not operate in the first signal converting mode, the first switching circuit and the second switching circuit are arranged to couple the second signal terminal and the third signal terminal, respectively, to a reference voltage.

    Abstract translation: 信号转换电路包括:第一开关电路; 第二开关电路; 以及第一平衡不平衡电路(Balun),其具有耦合到天线的第一信号端子,耦合到所述第一开关电路的第二信号端子和耦合到所述第二开关电路的第三信号端子; 其中当所述第一平衡不平衡电路以第一信号转换模式工作时,所述第一开关电路和所述第二开关电路分别被布置成将所述第二信号端和所述第三信号端耦合到第一信号处理电路,并且当 第一平衡不平衡电路在第一信号转换模式中不工作,第一开关电路和第二开关电路分别被布置成将第二信号端子和第三信号端子耦合到参考电压。

    OPERATING CIRCUIT APPLIED TO BACKLIGHT AND ASSOCIATED METHOD
    18.
    发明申请
    OPERATING CIRCUIT APPLIED TO BACKLIGHT AND ASSOCIATED METHOD 有权
    适用于背光和相关方法的操作电路

    公开(公告)号:US20120293084A1

    公开(公告)日:2012-11-22

    申请号:US13468001

    申请日:2012-05-09

    CPC classification number: H05B33/0827 H05B33/0815 Y02B20/347

    Abstract: An operating circuit applied to a backlight is provided, where the backlight includes a plurality of lighting elements, and the operating circuit includes a plurality of current control circuits, a plurality of switches, a minimum voltage selector, a supply voltage generating circuit and a control unit. The current control circuits are coupled to the lighting elements via a plurality of nodes, respectively. The switches are coupled to the nodes, respectively. The minimum voltage selector is utilized for receiving at least a portion of voltages of the plurality of nodes, and selecting a minimum voltage among the received voltages. The supply voltage generating circuit is utilized for generating a supply voltage of the lighting elements according to the minimum voltage. For each of the switches, the control unit determines an on/off state of the switch by determining whether the corresponding lighting element is an open circuit or not.

    Abstract translation: 提供了一种应用于背光源的工作电路,其中背光源包括多个照明元件,并且操作电路包括多个电流控制电路,多个开关,最小电压选择器,电源电压发生电路和控制 单元。 电流控制电路分别通过多个节点耦合到照明元件。 开关分别耦合到节点。 最小电压选择器用于接收多个节点的至少一部分电压,并且选择接收电压中的最小电压。 电源电压产生电路用于根据最小电压产生照明元件的电源电压。 对于每个开关,控制单元通过确定对应的照明元件是否是开路来确定开关的开/关状态。

    Voltage conversion apparatus
    19.
    发明授权
    Voltage conversion apparatus 有权
    电压转换装置

    公开(公告)号:US08253401B2

    公开(公告)日:2012-08-28

    申请号:US12557494

    申请日:2009-09-10

    CPC classification number: H02M3/1588 Y02B70/1466

    Abstract: A voltage conversion apparatus includes a DC-to-DC conversion circuit, a sensing circuit, and a compensation circuit. The voltage conversion apparatus is capable of adaptively adjusting the system bandwidth according to the load. The system bandwidth is increased to make the converted voltage responding to the load rapidly when the voltage conversion apparatus is operated at a transient state; and the system bandwidth is decreased to increase the system stability when the voltage conversion circuit is operated at a steady state.

    Abstract translation: 电压转换装置包括DC-DC转换电路,感测电路和补偿电路。 电压转换装置能够根据负载自适应地调整系统带宽。 当电压转换装置处于瞬态状态时,增加系统带宽以使转换的电压响应负载快速; 并且当电压转换电路在稳定状态下运行时,系统带宽减小以提高系统稳定性。

    APPARATUS AND METHOD FOR CALIBRATING IN-PHASE AND QUADRATURE-PHASE MISMATCH
    20.
    发明申请
    APPARATUS AND METHOD FOR CALIBRATING IN-PHASE AND QUADRATURE-PHASE MISMATCH 有权
    用于校准相间和相位错误匹配的装置和方法

    公开(公告)号:US20050180532A1

    公开(公告)日:2005-08-18

    申请号:US10908109

    申请日:2005-04-28

    CPC classification number: H04B1/30 H04B17/11

    Abstract: A method and device for calibrating in-phase and quadrature-phase (IQ) mismatch. The device is used in a direct down-conversion circuit of a communication system. The device has a first mixer for mixing an RF signal with a first carrier signal, so as to generate an in-phase analog signal; a second mixer for mixing the RF signal with a second carrier signal, so as to generate a quadrature-phase analog signal; an operation unit for executing a Least Mean Square (LMS) algorithm and thereby generating a compensation signal according to the in-phase analog signal and the quadrature-phase analog signal; and a calibration unit for compensating the in-phase analog signal and the quadrature-phase analog signal according to the compensation signal, so as to calibrate the IQ mismatch between the in-phase analog signal and the quadrature-phase analog signal.

    Abstract translation: 用于校准同相和正交相(IQ)失配的方法和装置。 该设备用于通信系统的直接下变频电路。 该装置具有用于混合RF信号与第一载波信号的第一混频器,以产生同相模拟信号; 第二混频器,用于将RF信号与第二载波信号混频,以产生正交相位模拟信号; 操作单元,用于执行最小均方(LMS)算法,从而根据同相模拟信号和正交相位模拟信号产生补偿信号; 以及校准单元,用于根据补偿信号补偿同相模拟信号和正交相位模拟信号,以便校准同相模拟信号和正交相位模拟信号之间的IQ失配。

Patent Agency Ranking