PHASE-LOCKED LOOP CIRCUIT, PHASE ERROR SIGN GENERATOR AND RFIC

    公开(公告)号:US20250070790A1

    公开(公告)日:2025-02-27

    申请号:US18808348

    申请日:2024-08-19

    Abstract: A phase-locked loop (PLL) circuit includes a voltage-controlled oscillator configured to generate an output clock signal of the PLL circuit, a phase detector configured to generate a phase error signal representing a phase difference between a first clock signal based on a reference clock signal and a second clock signal based on the output clock signal, a comparator configured to generate a phase error sign signal based on a reference voltage and the phase error signal, and a reference voltage generation circuit configured to scale first and second sign values of the phase error sign signal based on a fixed gain value and a variable gain value, respectively, and generate the reference voltage based on the scaled first and second sign values.

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