DocumentCode :
2724038
Title :
A low-power wide-range clock synchronizer with predictive-delay-adjustment scheme for continuous voltage scaling in DVFS control
Author :
Onouchi, Masafumi ; Kanno, Yusuke ; Saen, Makoto ; Komatsu, Shigenobu ; Yasu, Yoshihiko ; Ishibashi, Koichiro
Author_Institution :
Central Res. Lab., Hitachi, Ltd., Kokubunji, Japan
fYear :
2009
fDate :
16-18 Nov. 2009
Firstpage :
85
Lastpage :
88
Abstract :
A "wide-range voltage-and-frequency clock synchronizer" (WRCS) for maintaining synchronization during voltage-scaling transition during dynamic voltage-and-frequency scaling (DVFS) was developed. The key feature of the WRCS is so-called predictive-delay-adjustment (PDA) scheme based on a relative skew measure. The PDA scheme reduces the area of the WRCS by 77%. The area of the fabricated WRCS in a 40-nm CMOS is only 5.65×10-3 mm2. It was demonstrated for the first time that measured jitter is suppressed to less than 6.8% of clock period in the case of wide-range voltage variation (0.8-1.55 V) and wide frequency range (100 MHz-1 GHz). Moreover, current dissipation of the WRCS is only 0.48 mA at 1.1-V 100-MHz operation.
Keywords :
CMOS digital integrated circuits; clocks; low-power electronics; synchronisation; CMOS; DVFS control; continuous voltage scaling; current 0.48 mA; current dissipation; dynamic voltage-and-frequency scaling; frequency 100 MHz to 1 GHz; jitter suppression; low-power wide-range clock synchronizer; predictive-delay-adjustment scheme; size 40 nm; synchronization; voltage 0.8 V to 1.55 V; voltage-scaling transition; wide-range voltage-and-frequency clock synchronizer; Area measurement; Circuits; Clocks; Control systems; Delay; Dynamic voltage scaling; Frequency synchronization; Jitter; Network-on-a-chip; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid-State Circuits Conference, 2009. A-SSCC 2009. IEEE Asian
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-4433-5
Electronic_ISBN :
978-1-4244-4434-2
Type :
conf
DOI :
10.1109/ASSCC.2009.5357185
Filename :
5357185
Link To Document :
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