LC-Tank Colpitts Injection-Locked Frequency Divider With Even and Odd Modulo

Author

Jang, Sheng-Lyang ; Luo, Jhong-Chen ; Chang, Chia-Wei ; Lee, Chien-Feng ; Huang, Jhin-Fang

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei

Volume

19

Issue

2

fYear

2009

Firstpage

113

Lastpage

115

Abstract

A new injection-locked frequency divider (ILFD) using a standard 0.18 mum CMOS process is presented. The ILFD is based on a differential Colpitts voltage controlled oscillator (VCO) with a direct injection MOSFET for coupling an external signal to the resonators. The VCO is composed of two single-ended VCOs coupled with two transformers. Measurement results show that at the supply voltage of 1.4 V the divider´s free-running frequency is tunable from 4.77 to 5.08 GHz, and the proposed circuit can function as a first harmonic injection-locked oscillator, divide-by-2, -3, and -4 frequency divider. At the incident power of 0 dBm the divide-by-2 operation range is from the incident frequency 7.7 to 11.5 GHz and the divide-by-4 operation range is from the incident frequency 18.9 to 20.2 GHz.

Keywords

CMOS integrated circuits; MOSFET; frequency dividers; injection locked oscillators; CMOS process; LC-tank colpitts injection-locked frequency divider; direct injection MOSFET; divide-by-2 frequency divider; divide-by-3 frequency divider; divide-by-4 frequency divider; first harmonic injection-locked oscillator; frequency 18.9 GHz to 20.2 GHz; frequency 7.7 GHz to 11.5 GHz; size 0.18 mum; voltage 1.4 V; CMOS; LC-tank injection-locked frequency divider; colpitts VCO; locking range;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.2011338

Filename

4770116