An FBAR Driven− 261dB FOM Fractional-N PLL

user-60d14cd84c775e0497060202(2021)

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摘要
A 1mW −261dB FOM PLL with 91fs jitter is presented that combines a low-noise, high-frequency FBAR reference with the unity-gain harmonic-mixing (HM) PLL to minimize reference noise gain and avoid entirely the amplification of sigma-delta modulator quantization noise and fractional spurs, which, in turn, allows for a substantially larger loop bandwidth to suppress the VCO noise and speed settling.
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关键词
FBAR oscillator,Frequency Synthesizer,Fractional-N PLL
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