Title :
A Low Power Injection Locked LC-Tank Oscillator With Current Reused Topology
Author :
Lee, Shao-Hua ; Jang, Sheng-Lyang ; Chuang, Yun-Hsueh ; Chao, Juan-Jie ; Lee, Jian-Feng ; Juang, Ming-Hung
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei
fDate :
3/1/2007 12:00:00 AM
Abstract :
This letter presents a new current reused LC-tank injection locked oscillator (ILO), which is implemented by using a standard TSMC 0.18-mum CMOS process. The ILO, used as a divide-by-two (divide2) 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 1.5V, the divider free-running frequency is tunable from 2.11 to 2.42GHz, and at the incident power of 0dBm the locking range of the divider in the divide2 mode is about 0.9GHz (19.8%), from the incident frequency 4.1 to 5GHz. The core power consumption is 0.97mW
Keywords :
CMOS integrated circuits; MMIC oscillators; frequency dividers; injection locked oscillators; low-power electronics; 0.18 micron; 0.97 mW; 1.5 V; 2.11 to 2.42 GHz; 4.1 to 5 GHz; LC-tank oscillator; TSMC CMOS process; VCO; current reused topology; divide-by-two divider; injection nMOS; low power injection locked oscillator; switching transistors; voltage-controlled oscillator; Circuits; Energy consumption; Frequency conversion; Injection-locked oscillators; Logic; MOSFETs; Phase locked loops; Tail; Topology; Voltage-controlled oscillators; CMOS; current reuse; frequency divider (FD); injection locked oscillator (ILO); locking range; voltage-controlled oscillator (VCO);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.890493
