A CMOS LC INJECTION-LOCKED FREQUENCY DIVIDER WITH THE DIVISION RATIO OF 2 AND 3

作者：Jang Sheng Lyang^*; Lee Chien Feng; Luo Jhong Chen

来源：Microwave and Optical Technology Letters, 2009, 51(5): 1263-1267.

DOI：10.1002/mop.24312

• first-harmonic injection-locked oscillator
• divide-by-2 and-3
• injection-locked frequency divider
• CMOS

This article proposes a new CMOS LC-tank 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 double cross-coupled CMOS LC-tank oscillator with a symmetric MOS-switched LC resonator. The ILFD can be used as a first-harmonic injection-locked oscillator, divide-by-2 and divide-by-3 frequency divider depending upon the frequency of the injection signal. Measurement results show that at the supply voltage of 1.8 the free-running frequency is from 5.12 to 5.64 GHz. The core current and power consumption of the divider are 2.76 mA and 4.97 mW, respectively. At the incident power of 0 dBm, the locking range is from the incident frequency 9.48 to 11.48 GHz (15.04 to 17.12 GHz) in the divide-by-2(3) mode.

• 出版日期2009-5