Title :
Injection-Locked Frequency Divider Using Injection Mixer DC-Biased in Sub-threshold
Author :
Sheng-Lyang Jang ; Li-Yu Huang ; Ching-Wen Hsue ; Jhin Fang Huang
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
A wide locking range CMOS LC-tank injection locked frequency divider (ILFD) is proposed and it uses a pre-amplifier stage in series with a post-injection mixer. The injection signal is fed to a pre-amplifier to enhance the injection signal at the post-mixer gate in the divide-by-2 ILFD. The gate of mixer is biased in sub-threshold to provide large output voltage. At the supply voltage of 0.85 V, tunable free-running low-frequency band from 3.23 to 3.59 GHz and high-band from 1.71 to 1.73 GHz are found. The low-/high-band locking range is (61.7%) from 2.8 to 5.3 GHz/(64.9%) from 5.1~10.0 GHz.
Keywords :
CMOS analogue integrated circuits; LC circuits; MMIC mixers; UHF mixers; field effect MMIC; frequency dividers; CMOS injection locked frequency divider; LC-tank injection locked frequency divider; frequency 1.71 GHz to 1.73 GHz; frequency 3.23 GHz to 3.59 GHz; post injection mixer; preamplifier stage; subthreshold biased injection mixer; tunable free running low frequency band; voltage 0.85 V; CMOS integrated circuits; Logic gates; MOSFET; Mixers; Threshold voltage; Wireless communication; Divide-by2; ILFD; dual-band; locking range; sub-threshold; voltage swing;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2015.2391996
