Title :
Speed enhancement technique for divide-by-4 injection-locked frequency divider and its application to fractional division
Author :
Chang, Ka Fai ; Cheng, Kwok-Keung Michael
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong, China
Abstract :
A new cross-coupling method for the design of divide-by-4 injection-locked frequency divider (ILFD) is introduced for increased operation speed with no extra power consumption. Moreover, the proposed cross-coupled divide-by-4 ILFD is extended to the application of fractional divider based upon the phase-switching scheme. A prototype is fabricated in a standard 0.35 μm CMOS process. It exhibits an operation frequency range from 2.26 to 2.67 GHz and consumes less than 3.63 mW with a 1.5 V supply.
Keywords :
CMOS integrated circuits; UHF integrated circuits; frequency dividers; voltage-controlled oscillators; CMOS process; cross-coupling method; divide-by-4 injection-locked frequency divider; fractional division; frequency 2.26 GHz to 2.67 GHz; phase-switching scheme; power 3.63 mW; size 0.35 mum; speed enhancement; voltage 1.5 V; voltage-controlled oscillators; Clocks; Couplings; Frequency conversion; Frequency synthesizers; Latches; Power demand; Transistors; Fractional division; frequency divider; injection-locked; phase-switching; quadrature injection;
Conference_Titel :
Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-61284-754-2
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2011.5972626
