A low power injection locked LC-tank oscillator with current reused topology

作者：Lee Shao Hua^*; Jang Sheng Lyang; Chuang Yun Hsueh; Chao Juan Jie; Lee Jian Feng; Juang Ming Hung

来源：IEEE Microwave and Wireless Components Letters, 2007, 17(3): 220-222.

DOI：10.1109/LMWC.2006.890493

• CMOS
• current reuse
• frequency divider (FD)
• injection locked oscillator (ILO)
• locking range
• voltage-controlled oscillator (VCO)

This letter presents a new current reused LC-tank injection locked oscillator (ILO), which is implemented by using a standard TSMC 0.18-mu m CMOS process. The ILO, used as a divide-by-two (divided by 2) divider, is consisted of two switching transistors stacked in series. The injection locking is performed by adding an injection nMOS between the differential outputs of the divider. The divider can operate with a lower power due to the reuse of dc current. The measurement results show that at the supply voltage of 1.5 V, the divider free-running frequency is tunable from 2.11 to 2.42 GHz, and at the incident power of 0 dBm the locking range of the divider in the divided by 2 mode is about 0.9 GHz (19.8%), from the incident frequency 4.1 to 5 GHz. The core power consumption is 0.97 mW.

• 出版日期2007-3