Title :
A low power 9GHz divide-by-3 injection locked frequency divider in 0.18μm CMOS with 15% locking range
Author :
Asadian, S. ; Hemmati, M.J. ; Naseh, S.
Author_Institution :
Electr. Eng. Group, Ferdowsi Univ. of Mashhad, Mashhad, Iran
Abstract :
A new low power divide-by-3 injection locked LC divider is proposed for PLL-based frequency synthesizers. The circuit is made of two voltage controlled oscillators coupled together via four MOSFETs, where capacitors are placed in series with the source of the coupling transistors leading to a reduction in power consumption. The control voltage of the two VCOs are tied together to achieve a wider locking range. A locking range of 1.25 GHz (from 7.9 GHz to 9.15 GHz) was achieved. The divider draws 610μA from a 1.2V supply voltage.
Keywords :
CMOS integrated circuits; MOSFET; capacitors; field effect MMIC; frequency dividers; frequency synthesizers; low-power electronics; phase locked loops; voltage-controlled oscillators; CMOS integrated circuit; LC divider; MOSFET; PLL-based frequency synthesizers; capacitors; coupling transistors; current 610 muA; divide-by-3 frequency divider; frequency 1.25 GHz; frequency 7.9 GHz to 9.15 GHz; injection locked frequency divider; low power frequency divider; power consumption; size 0.18 mum; voltage 1.2 V; voltage controlled oscillators; CMOS integrated circuits; Capacitors; Frequency conversion; Power demand; Transistors; Voltage-controlled oscillators; DC-blocking capacitor; Injection locked frequency divider; cross-coupled LC oscillator; divide-by-3; injection transistors;
Conference_Titel :
Electronics, Circuits and Systems (ICECS), 2011 18th IEEE International Conference on
Conference_Location :
Beirut
Print_ISBN :
978-1-4577-1845-8
Electronic_ISBN :
978-1-4577-1844-1
DOI :
10.1109/ICECS.2011.6122349
