A 0.18 µm CMOS Wide-Band Injection-Locked Frequency Divider Using Push-Push Oscillator

Sheng-Lyang JANG  Chia-Wei CHANG  Yu-Sheng CHEN  Jhin-Fang HUANG  Jau-Wei HSIEH  Chong-Wei HUANG 

Publication
IEICE TRANSACTIONS on Electronics  Vol.E94-C  No.8  pp.1332-1335
Publication Date: 2011/08/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Electronic Circuits
Keyword: 
divid-by-3 LC-tank injection-locked frequency divider,  push-push oscillator,  locking range,  linear mixer, 

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Summary: 
A novel divide-by-3 injection-locked frequency divider (ILFD) is proposed. The ILFD circuit is realized with a cross-coupled n-core MOS LC-tank oscillator embedded with a push-push signal generator and two injection MOSFETs for coupling the injection signal into the resonator. The ILFD uses the linear mixer to extend the locking range and has been implemented in a standard 0.18 µm CMOS process. The core power consumption of the ILFD core is 3.12 mW. The divider's free-running frequency is tunable from 4.26 GHz to 4.9 GHz by tuning the varactor's control bias, and at the incident power of 0 dBm the locking range of the ILFD used as a divide-by-3 divider is 1.5 GHz, from 12.5 GHz to 14.0 GHz.