A novel divide-by-3 Hartley injection-locked frequency divider

作者：Lee Chien Feng^*; Jang Sheng Lyang

来源：Microwave and Optical Technology Letters, 2008, 50(4): 906-909.

DOI：10.1002/mop.23242

• divide-by-3
• injection-locked firequency divider
• CMOS
• LC-tank Hartley oscillator
• inductors

This study proposes a new divide-by-3 CMOS injection locked frequency divider (ILFD) fabricated in a 0.18-mu m CMOS process and describes the operation principle of the ILFD. The ILFD circuit is realized with a Hartley CMOS LC-tank oscillator with two injection MOSFETs. The self-oscillating VCO is injection-locked by third-harmonic input to obtain the division order of three. Measurement results show that at the supply voltage of 1.5 V, the free-running frequency is from 3.86 to 4.27 GHz. At the incident power of 6 dBm, the locking range is from the incident frequency 12.13-12.86 GHz.

• 出版日期2008-4