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A 7 ps Jitter 0.053 mm ^{2} Fast Lock All-Digital DLL With a Wide Range and High Resolution DCC

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4 Author(s)
Dongsuk Shin ; Hynix Semicond., Icheon, South Korea ; Janghoon Song ; Hyunsoo Chae ; Chulwoo Kim

This paper presents a fast lock all-digital delay-locked loop (ADDLL) with a wide range and high resolution all-digital duty cycle corrector (ADDCC), which achieves low jitter, fast lock time, and accurate 50% duty cycle correction with a clock-synchronized delay (CSD) and time-to-digital converter (TDC) schemes. The ADDLL uses a self-calibration scheme to reduce the phase error and jitter, and a range doubler to double its operating frequency range with a negligible increase in power and area. The ADDCC employs a weighted signal generator to improve a resolution problem at high operating frequencies and a cycle detector to insure a wide operation range. The proposed ADDLL with the ADDCC was fabricated using a 0.18 mum CMOS technology that operates over a wide frequency range from 440 MHz to 1.5 GHz with 15 cycles of maximum lock time. The peak-to-peak jitter is 7 ps at 1.5 GHz with a power consumption of 43 mW and the area is 0.053 mm2.

Published in:

IEEE Journal of Solid-State Circuits  (Volume:44 ,  Issue: 9 )