Title :
A Gigahertz Cyclic Injection DLL Clock Generator with an Infinite Acquisition Range
Author :
Du, Qingjin ; Zhuang, Jingcheng ; Kwasniewski, Tad
Author_Institution :
Dept. of Electron., Carleton Univ., Ottawa, ON
Abstract :
This paper presents the implementation of a cyclic injection DLL based clock generator with an infinite acquisition range and low timing jitter, low phase noise performance. A novel switching scheme with a resettable divider is designed to synchronize the operation of the other blocks in the circuit and to eliminate the need of a start-up or locking detection circuitry. The phase noise performance is improved by injecting the reference edge periodically. Programmable multiplication ratios from 13 to 20 are achieved with an output frequency range of 900 MHz to 2.9 GHz. The circuit is implemented in TSMC 0.18 mum CMOS technology. The measured cycle-to-cycle timing jitter at 2.5 GHz is 2.49 ps (rms) and 20 ps (pk-pk), and the phase noise is -119 dBc/Hz at 1 MHz offset for a carrier frequency of 2.756 GHz.
Keywords :
CMOS digital integrated circuits; UHF frequency convertors; UHF integrated circuits; clocks; delay lock loops; frequency dividers; integrated circuit design; integrated circuit noise; phase noise; timing jitter; Programmable multiplication ratios; TSMC CMOS technology; delay-locked loops; frequency 900 MHz to 2.9 GHz; gigahertz cyclic injection DLL clock generator; infinite acquisition range; phase noise performance; programmable multiplication ratios; resettable divider design; size 0.18 mum; switching scheme; timing jitter; CMOS technology; Circuits; Clocks; Delay; Frequency conversion; Phase locked loops; Phase noise; Signal generators; Timing jitter; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2006. MWSCAS '06. 49th IEEE International Midwest Symposium on
Conference_Location :
San Juan
Print_ISBN :
1-4244-0172-0
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2006.382196
