A 0.18µm 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

doi:10.1587/transele.E94.C.1332

Regular Section

A 0.18µm 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

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Keywords: divid-by-3 LC-tank injection-locked frequency divider, push-push oscillator, locking range, linear mixer

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2011 Volume E94.C Issue 8 Pages 1332-1335

DOI https://doi.org/10.1587/transele.E94.C.1332

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Abstract

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 0.18µm CMOS process. The core power consumption of the ILFD core is 3.12mW. The divider's free-running frequency is tunable from 4.26GHz to 4.9GHz by tuning the varactor's control bias, and at the incident power of 0dBm the locking range of the ILFD used as a divide-by-3 divider is 1.5GHz, from 12.5GHz to 14.0GHz.

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