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A 0.35 µm CMOS LC-tank injection-locked frequency divider

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4 Author(s)
Chtioui, T. ; Lab. of Electron. & Technol. of Inf. (LETI), Nat. Eng. Sch. of Sfax, Sfax, Tunisia ; Ben Issa, D. ; Fakhfakh, A. ; Samet, M.

A divide-by-2 injection-locked frequency divider (ILFD) has been designed in a 0.35 μm CMOS process. The ILFD circuit is realized with a differential CMOS LC-tank oscillator with an injection MOS. Simulation results show that at the supply voltage of 2.5 V and by tuning Vtune from 0 to 2.5 V, the tuning range of the free-running ILFD is from 1.84 to 2.89 GHz. At the injection signal power of 0 dBm, the locking range of the proposed ILFD is about 2.49 GHz from the incident frequency 3.53 to 6.02 GHz. The ILFD dissipate 3.43 mW. At the tuning voltage of 1.6 V the simulated phase noise of the free running ILFD is -125.6 dBc/Hz at 1.066 MHz offset frequency at 2.65 GHz and the phase noise of the locked output is -132.7 dBc/Hz while the phase noise of the injected signal is -126.7 dBc/Hz.

Published in:

Design and Technology of Integrated Systems in Nanoscale Era (DTIS), 2010 5th International Conference on

Date of Conference:

23-25 March 2010