Techniques for In-band Phase Noise Suppression in Re-circulating DLLs


This paper presents a re-circulating delay-locked loop @LL) with various innovations to improve in-band phase noise suppression. The voltage-controlled oscillator @’CO) and bias circuitry incorporate circuit-level techniques that reduce l/f noise through switched biasing. The phase realignment theory presented in [I] is applied to optimize the VCO so as to… (More)


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