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A Divide-by-3 Injection Locked Frequency Divider With Single-Ended Input

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3 Author(s)
Sheng-Lyang Jang ; Nat. Taiwan Univ. of Sci. & Technol., Taipei ; Chien-Feng Lee ; Wei-Hsung Yen

This letter proposes a new divide-by-3 CMOS injection locked frequency divider (ILFDMOS. ) fabricated in a 0.18-mum CMOS process and describes the operation principle of the ILFD. The ILFD circuit is realized with a double cross-coupled CMOS LC-tank oscillator with an injection MOS. The self-oscillating voltage controlled oscillator is injection-locked by third-harmonic input to obtain the division order of three. Measurement results show that at the supply voltage of 1.8 V, the free-running frequency is from 1.62 to 1.89 GHz. At the incident power of 5 dBm, the locking range is from the incident frequency 4.85 to 5.7 GHz.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:18 ,  Issue: 2 )