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

Volume

25

Issue

3

fYear

2015

fDate

Mar-15

Firstpage

193

Lastpage

195

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;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2015.2391996

Filename

7027866