A Low-Spur and Low-Jitter Fractional Output Divider With Self-Adaption Frequency Filtering Technique Yumeng Yang

Abstract

An open-loop fractional output divider (FOD) with self-adaption frequency filtering for digital-to-time converter (DTC) gain and integrated non-linearity (INL) background calibration is presented in this article. The DTC is usually adopted in the FOD to compensate the quantization error. However, the delay of the DTC is sensitive to process, voltage, and temperature (PVT) variations, which necessities gain and INL calibrations. The existing FODs can only perform gain calibration or require prior