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A fast-locking all-digital phased-locked loop with a 1 ps resolution time-to-digital converter using calibrated time amplifier and interpolation digitally-controlled-oscillator

This paper presents an all-digital phase-locked loop (ADPLL) in the 0.18 μm CMOS process, which uses a multi-stage time-to-digital converter (TDC) with calibration and interpolation digitally-controlled-oscillator (IDCO). The ADPLL also utilizes a frequency tracking engine (FTE) to reduce the system locking time. The ADPLL has a frequency range of 149-1450 MHz, the minimum peak-to-peak jitter achieves 21.9 ps, and the TDC shows the minimum resolution of 1 ps. The power dissipation of the ADPLL is 18.2 mW at 800 MHz.