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A Multiphase Generator Based on VCDR (Voltage-Controlled Variable Delay Ring)
IEICE TRANSACTIONS on Electronics
Publication Date: 2009/10/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Integrated Electronics
delay-locked loop, phase multiplication,
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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.