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Authors
Affiliations
1 National School of Engineering of Sfax, 3.5 Street of Soukra, 3038 University of Sfax, TN
Source
Networking and Communication Engineering, Vol 3, No 15 (2011), Pagination: 988-994
Abstract
This paper proposes a wide tuning Injection-Locked Frequency Divider (ILFD) and describes its operation principle. The circuit is made of a differential CMOS-tank oscillator in 0.35 μm process and is based on the direct injection topology. A theoretical prediction of the Locking range is developed and a graphical optimization of the circuit is done. The simulated results obtained with optimum parameter sizing show that at 2.5 V supply voltage, the divider free-running frequencies are from 2.27 to 2.53 GHz. The locking range of the proposed ILFD is about 548 MHz from the incident frequency 4.524 to 5.074 GHz. The power consumption is 9 mW and the phase noise of the locked output is -128.6 dBc/Hz at 1 MHz offset frequency.
Keywords
Graphical Optimization Method, Injection-Locked Frequency Divider (ILFD), Locking Range, VCO.
