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A 0.4-2GHz, Seamless Frequency Tracking controlled Dual-loop digital PLL  

Son, Young-Sang (School of Electronic Engineering, Soongsil University)
Lim, Ji-Hoon (School of Electronic Engineering, Soongsil University)
Ha, Jong-Chan (School of Electronic Engineering, Soongsil University)
Wee, Jae-Kyung (School of Electronic Engineering, Soongsil University)
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Abstract
This paper proposes a new dual-loop digital PLL(DPLL) using seamless frequency tracking methods. The dual-loop construction, which is composed of the coarse and fine loop for fast locking time and a switching noise suppression, is used successive approximation register technique and TDC. The proposed DPLL in order to compensate the quality of jitter which follows long-term of input frequency is newly added cord conversion frequency tracking method. Also, this DPLL has VCO circuitry consisting of digitally controlled V-I converter and current-control oscillator (CCO) for robust jitter characteristics and wide lock range. The chip is fabricated with Dongbu HiTek $0.18-{\mu}m$ CMOS technology. Its operation range has the wide operation range of 0.4-2GHz and the area of $0.18mm^2$. It shows the peak-to-peak period jitter of 2 psec under no power noise and the power dissipation of 18mW at 2GHz through HSPICE simulation.
Keywords
digital phase-locked loop; time-to-digital converter; digital-to-analog converter; successive approximation register; dual-loop PLL;
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