A Wide Locking Range LC-Tank Injection-Locked Frequency Divider

Author

Jang, Sheng-Lyang ; Lee, Chien-Feng

Author_Institution

Nat. Taiwan Univ. of Sci. & Technol., Taipei

Volume

17

Issue

8

fYear

2007

Firstpage

613

Lastpage

615

Abstract

This letter proposes a wideband injection-locked frequency divider (ILFD) and describes the operation principle of the ILFD. The circuit is made of a differential CMOS LC-tank oscillator and is based on the direct injection topology. The wideband function is obtained by tuning the switch across the tank inductors. The divide-by-two ILFD can provide wide locking range and the measurement results show that at the supply voltage of 1.8 V, the dual-band divider free-running frequencies are from 1.77 to 2.17 GHz for the low-band mode, and from 2.59 to 3.2 GHz for the high-band mode. At the incident power of 0 dBm, the locking range is about 1.7 GHz from the incident frequency 3.31 to 5.01 GHz at low band and 4.06 GHz from 3.94 to 8.0 GHz at high-band mode. The circuit can be used as a single wideband ILFD.

Keywords

CMOS integrated circuits; MMIC frequency convertors; UHF frequency convertors; frequency dividers; injection locked oscillators; ILFD; differential CMOS LC tank oscillator; dual band divider; frequency 1.77 GHz to 2.17 GHz; frequency 2.59 GHz to 3.2 GHz; frequency 3.31 GHz to 5.01 GHz; frequency 3.94 GHz to 8.0 GHz; injection locked frequency divider; tank inductors; voltage 1.8 V; wide locking range; wideband function; Circuit optimization; Circuit topology; Frequency conversion; Frequency measurement; Inductors; Injection-locked oscillators; Switches; Tuning; Voltage; Wideband; $LC$ -tank oscillator; CMOS; direct injection-locked frequency divider (ILFD); inductors; wide injection locking range;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2007.901796

Filename

4285670