DocumentCode :
1360541
Title :
A Low Power and Wide Range Programmable Clock Generator With a High Multiplication Factor
Author :
Choi, Jaehyouk ; Kim, Stephen T. ; Kim, Woonyun ; Kim, Kwan-Woo ; Lim, Kyutae ; Laskar, Joy
Author_Institution :
Electr. & Comput. Eng. Dept., Georgia Inst. of Technol., Atlanta, GA, USA
Volume :
19
Issue :
4
fYear :
2011
fDate :
4/1/2011 12:00:00 AM
Firstpage :
701
Lastpage :
705
Abstract :
A programmable delay locked loop (DLL) based clock generator, providing a high multiplication factor, has been developed in a 0.18- μm CMOS technology. Utilizing the proposed pulse generator, purely consisting of D flip flops (DFFs) and inverters, the clock generator provides a high multiplication factor of up to 24. It consumes only 16.2 mW when generating 2.16 GHz output signals. In addition, the proposed saturated-type unit delay cell adopted in the voltage controlled delay line (VCDL) is capable of providing a long delay while maintaining fast-switching signal edges. Thus, the DLL can lock up an input reference frequency as low as 30 MHz while maintaining good phase noise performance and small chip area occupancy. The phase noise is -88.7 and -99.8 dBc/Hz at 10 kHz and 100 kHz offsets, respectively, from the operating frequency of 1.2 GHz, which is equivalent to a 1.7 ps RMS jitter. The active chip area takes only 0.051 mm2.
Keywords :
CMOS digital integrated circuits; UHF integrated circuits; clocks; delay lines; delay lock loops; low-power electronics; phase noise; programmable circuits; pulse generators; CMOS technology; D flip flops; DLL based clock generator; RMS jitter; fast-switching signal edges; frequency 1.2 GHz; frequency 2.16 GHz; high multiplication factor; inverters; phase noise; power 16.2 mW; programmable delay locked loop; pulse generator; saturated-type unit delay cell; size 0.18 mum; time 1.7 ps; voltage controlled delay line; wide range programmable clock generator; Clock generator; delay cell; delay locked loop (DLL); multiplication factor; programmable;
fLanguage :
English
Journal_Title :
Very Large Scale Integration (VLSI) Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
1063-8210
Type :
jour
DOI :
10.1109/TVLSI.2009.2036433
Filename :
5356231
Link To Document :
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