A Multiphase Generator Based on VCDR (Voltage-Controlled Variable Delay Ring)

Minseok WOO  Byoungkwon MOON  Daejeong KIM  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E92-C   No.10   pp.1315-1318
Publication Date: 2009/10/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E92.C.1315
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Integrated Electronics
Keyword: 
delay-locked loop,  phase multiplication,  

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Summary: 
A new delay-locked loop (DLL)-based multiphase generator is presented. To achieve an arbitrary integer multiplication factor, a voltage-controlled variable delay ring (VCDR) is adopted, and a new "generate and reset" (GNR) cell is developed. The whole circuit of the closed loop was designed and characterized in a 1.2-V 0.13-µm CMOS process. The simulated results show that the loop operates from 1.0 MHz to 1.2 GHz under the supply voltage of 1.2 V, and the GNR cell exhibits low supply sensitivity of 1300-ps/V.