Test circuit and method
    12.
    发明授权

    公开(公告)号:US12007436B2

    公开(公告)日:2024-06-11

    申请号:US18363143

    申请日:2023-08-01

    CPC classification number: G01R31/2884 G01R31/2853 G01R31/2879

    Abstract: An IC includes a device-under-test (DUT) configured to receive a first AC signal at a first node and output a second AC signal at a second node, the second AC signal being based on the first AC signal, and first and second detection circuits. Each of the first and second detection circuits includes a first gain stage coupled to a corresponding one of the first or second nodes through a first capacitive device, a second gain stage in a cascade arrangement with the first gain stage, and a low-pass filter configured to generate a DC signal based on an output signal of the second gain stage.

    Auto frequency calibration for a phase locked loop and method of use
    15.
    发明授权
    Auto frequency calibration for a phase locked loop and method of use 有权
    锁相环的自动频率校准和使用方法

    公开(公告)号:US09490819B2

    公开(公告)日:2016-11-08

    申请号:US14603900

    申请日:2015-01-23

    Abstract: An apparatus comprises a code generator configured to generate a coarse tuning signal and a reset signal based on a reference frequency and a phase difference signal. The apparatus also comprises a digital loop filter configured to generate a fine tuning signal based on the phase difference signal. The apparatus further comprises a voltage control oscillator configured to generate an output signal based on the coarse tuning signal and the fine tuning signal. The apparatus additionally comprises a divider configured to generate a divider frequency based on a divider control signal and the output signal. The phase difference signal is based, at least in part, on the divider frequency, and the divider is configured to be reset based on the reset signal.

    Abstract translation: 一种装置,包括代码发生器,其被配置为基于参考频率和相位差信号产生粗调谐信号和复位信号。 该装置还包括数字环路滤波器,其配置为基于相位差信号产生微调信号。 该装置还包括电压控制振荡器,被配置为基于粗调谐信号和微调信号产生输出信号。 该装置还包括分配器,其被配置为基于分频器控制信号和输出信号产生分频器频率。 相位差信号至少部分地基于分频器,并且分频器被配置为基于复位信号被复位。

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