A Low Voltage Divide-by-4 Injection Locked Frequency Divider With Quadrature Outputs
- 30 April 2007
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Microwave and Wireless Components Letters
- Vol. 17 (5) , 373-375
- https://doi.org/10.1109/LMWC.2007.895718
Abstract
This letter presents a low voltage quadrature divide-by-4 (divide4) injection-locked frequency divider (QILFD). The QILFD consists of a 1.8-GHz quadrature voltage controlled oscillator (QVCO) and two NMOS switches, which are inserted into the quadrature outputs of the QVCO for signal injection. The low-voltage CMOS divide4 QILFD has been implemented with the TSMC 0.18-mum 1P6 M CMOS technology and the core power consumption is 3.12mW at the supply voltage of 1.2V. The free-running frequency of the QILFD is tunable from 1.73 to 1.99GHz, the measured phase noise of QILFD is -118dBc/Hz at 1-MHz offset from the free running frequency of 1.82GHz. At the input power of 0dBm, the total locking range is from 6.86 to 8.02GHz as the tuning voltage is varied from 0 to 1.2V. The phase noise of the locked output spectrum is lower than that of free running ring oscillator by 11dBc/Hz. The phase deviation of quadrature output is about 0.8degKeywords
This publication has 3 references indexed in Scilit:
- Circuit Techniques for CMOS Divide-By-Four Frequency DividerIEEE Microwave and Wireless Components Letters, 2007
- A wide locking range and low Voltage CMOS direct injection-locked frequency dividerIEEE Microwave and Wireless Components Letters, 2006
- An integrated low power highly linear 2.4-GHz CMOS receiver front-end based on current amplification and mixingIEEE Microwave and Wireless Components Letters, 2005