利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

16 条记录 (耗时 0.015 秒)

    Accurate, low-power power detector circuits and related methods using programmable reference circuitry
    1.
    发明授权
    Accurate, low-power power detector circuits and related methods using programmable reference circuitry 有权

    公开(公告)号：US10164593B1

    公开(公告)日：2018-12-25

    申请号：US15697940

    申请日：2017-09-07

    申请人： Silicon Laboratories Inc.

    发明人： Navin Harwalkar ,  John M. Khoury

    IPC分类号： H03G3/20 ,  H02M1/00 ,  H02M3/156 ,  G05F1/10 ,  H03M1/66

    摘要： Embodiments of power detector circuits and related methods to compensate for undesired DC offsets generated within power detector circuits are disclosed. Input signals having input frequencies are received and converted to a magnitude signal, and reference signals are also generated. The magnitude signal may include a DC component proportional to a power of the input signal along with undesired DC offsets. The reference signal may include a DC component proportional to a power of at least one input reference signal along with undesired DC offsets. To compensate for errors introduced by the DC offsets, a programmable digital input signal is determined in a calibration mode and then applied to reference circuitry in a normal mode to compensate for the DC offsets. For the calibration mode, a difference between the magnitude signal and the reference signal is compared to a threshold value to generate a power detection output signal.

    Accurate, low-power power detector circuits and related methods
    3.
    发明授权
    Accurate, low-power power detector circuits and related methods 有权

    公开(公告)号：US10063203B1

    公开(公告)日：2018-08-28

    申请号：US15697859

    申请日：2017-09-07

    申请人： Silicon Laboratories Inc.

    发明人： Navin Harwalkar ,  John M. Khoury

    IPC分类号： G05F1/67 ,  H02M1/00 ,  H02M3/156 ,  H03G3/20 ,  H03M1/66

    CPC分类号： H03G3/20 ,  G05F1/67 ,  H02M3/156 ,  H02M2001/0022 ,  H03G3/3052 ,  H03G3/3068 ,  H03M1/66

    摘要： Embodiments of power detector circuits and related methods to compensate for undesired DC offsets generated within power detector circuits are disclosed. Input signals having input frequencies are received and converted to a magnitude signal, and reference signals are also generated. The magnitude signal may include a DC component proportional to a power of the input signal along with undesired DC offsets. The reference signal may include a DC component proportional to a power of at least one input reference signal along with undesired DC offsets. To compensate for errors introduced by the DC offsets, a DC offset calibration signal or a gain are determined in a calibration mode and then applied in a normal mode to compensate for the DC offsets. For the calibration mode, a difference between the magnitude signal and the reference signal is compared to a threshold value to generate a power detection output signal.

    Image Rejection Calibration With A Passive Network
    4.
    发明申请
    Image Rejection Calibration With A Passive Network 有权
    被动网络图像拒绝校准

    公开(公告)号：US20160149604A1

    公开(公告)日：2016-05-26

    申请号：US14549910

    申请日：2014-11-21

    申请人： Silicon Laboratories Inc.

    发明人： John M. Khoury ,  Navin Harwalkar

    IPC分类号： H04B1/16 ,  H04L27/06 ,  H04B1/10

    CPC分类号： H04L27/06 ,  G01R19/2506 ,  G01R23/165 ,  H04B1/0021 ,  H04B2001/0416

    摘要： In one aspect, an apparatus includes: a mixer to receive a radio frequency (RF) signal and downconvert the RF signal into a second frequency signal; an amplifier coupled to the mixer to amplify the second frequency signal; an image rejection (IR) circuit coupled to the programmable gain amplifier (PGA) to orthogonally correct a gain and a phase of the amplified second frequency signal to output a corrected amplified second frequency signal; and a complex filter to filter the corrected amplified second frequency signal.

    摘要翻译： 一方面，一种装置包括：混合器，用于接收射频（RF）信号，并将RF信号下变频为第二频率信号; 耦合到所述混频器以放大所述第二频率信号的放大器; 耦合到所述可编程增益放大器（PGA）的正交校正放大的第二频率信号的增益和相位以输出校正的放大的第二频率信号的图像抑制（IR）电路; 以及用于对经校正的放大后的第二频率信号进行滤波的复数滤波器。

    Transceiver circuit having a single impedance matching network
    5.
    发明授权
    Transceiver circuit having a single impedance matching network 有权

    公开(公告)号：US10141971B1

    公开(公告)日：2018-11-27

    申请号：US15815920

    申请日：2017-11-17

    申请人： Silicon Laboratories Inc.

    发明人： Mohamed Elkholy ,  Ayman Shafik ,  Yang Gao ,  Arup Mukherji ,  Navin Harwalkar

    IPC分类号： H04B1/40 ,  H04B7/26 ,  H04B1/04 ,  H04B1/48

    摘要： Embodiments of transceiver circuits disclosed herein include a first amplifier coupled to receive signals from an antenna during a receive (RX) mode of the transceiver circuit, a second amplifier coupled to transmit signals to the antenna during a transmit (TX) mode of the transceiver circuit, and a single impedance matching network coupled to the antenna and directly connected to a shared node to which the first and second amplifiers are directly connected. The single impedance matching network is configured to transform an impedance of the antenna into a resistance at the shared node. A control circuit is coupled to control the impedance transformation of the single impedance matching network, so as to provide a first resistance at the shared node during RX mode and a second resistance at the shared node during TX mode, wherein the second resistance is different from the first resistance.

    HIGH PERFORMANCE, LOW COST RECEIVER FRONT END
    7.
    发明申请
    HIGH PERFORMANCE, LOW COST RECEIVER FRONT END 有权
    高性能，低成本接收机前端

    公开(公告)号：US20150111514A1

    公开(公告)日：2015-04-23

    申请号：US14057404

    申请日：2013-10-18

    申请人： Silicon Laboratories Inc.

    发明人： Navin Harwalkar ,  Tim Stroud ,  Dan Kasha

    IPC分类号： H04B1/12

    CPC分类号： H04B1/123 ,  H04B1/18

    摘要： A radio frequency (RF) receiver front end includes an RF attenuator for receiving an RF input signal and a low noise amplifier (LNA). In one form, the LNA provides a differential output signal and includes a first polarity amplifier and a plurality of second polarity amplifiers. The first polarity amplifier has an input terminal coupled to the output of the RF attenuator, an output terminal for providing a first component of the differential RF output signal, and has a first input impedance. Each of the plurality of second polarity amplifiers has an input terminal coupled to the output of said RF attenuator, and an output terminal. The output terminals of said plurality of second polarity amplifiers are coupled together and form a second component of the differential RF output signal. Each of the plurality of second polarity amplifiers has a second input impedance higher than the first input impedance.

    摘要翻译： 射频（RF）接收机前端包括用于接收RF输入信号的RF衰减器和低噪声放大器（LNA）。 在一种形式中，LNA提供差分输出信号，并且包括第一极性放大器和多个第二极性放大器。 第一极性放大器具有耦合到RF衰减器的输出的输入端，用于提供差分RF输出信号的第一分量的输出端，并具有第一输入阻抗。 多个第二极性放大器中的每一个具有耦合到所述RF衰减器的输出的输入端和输出端。 所述多个第二极性放大器的输出端子耦合在一起并形成差分RF输出信号的第二分量。 多个第二极性放大器中的每一个具有高于第一输入阻抗的第二输入阻抗。

    High performance, low cost receiver front end
    10.
    发明授权
    High performance, low cost receiver front end 有权
    高性能，低成本接收机前端

    公开(公告)号：US09178549B2

    公开(公告)日：2015-11-03

    申请号：US14057404

    申请日：2013-10-18

    申请人： Silicon Laboratories Inc.

    发明人： Navin Harwalkar ,  Tim Stroud ,  Dan Kasha

    IPC分类号： H04B1/18 ,  H04B1/12

    CPC分类号： H04B1/123 ,  H04B1/18

    摘要： A radio frequency (RF) receiver front end includes an RF attenuator for receiving an RF input signal and a low noise amplifier (LNA). In one form, the LNA provides a differential output signal and includes a first polarity amplifier and a plurality of second polarity amplifiers. The first polarity amplifier has an input terminal coupled to the output of the RF attenuator, an output terminal for providing a first component of the differential RF output signal, and has a first input impedance. Each of the plurality of second polarity amplifiers has an input terminal coupled to the output of said RF attenuator, and an output terminal. The output terminals of said plurality of second polarity amplifiers are coupled together and form a second component of the differential RF output signal. Each of the plurality of second polarity amplifiers has a second input impedance higher than the first input impedance.

    摘要翻译： 射频（RF）接收机前端包括用于接收RF输入信号的RF衰减器和低噪声放大器（LNA）。 在一种形式中，LNA提供差分输出信号，并且包括第一极性放大器和多个第二极性放大器。 第一极性放大器具有耦合到RF衰减器的输出的输入端，用于提供差分RF输出信号的第一分量的输出端，并具有第一输入阻抗。 多个第二极性放大器中的每一个具有耦合到所述RF衰减器的输出的输入端和输出端。 所述多个第二极性放大器的输出端子耦合在一起并形成差分RF输出信号的第二分量。 多个第二极性放大器中的每一个具有高于第一输入阻抗的第二输入阻抗。