The Design of Double-Positive-Feedback Voltage-Controlled Oscillator

Author

Huang, Zue-Der ; Wu, Chung-Yu

Author_Institution

Dept. & Insititute of Electron. Eng., Nat. Chiao Tung Uni versity, Hsinchu, Taiwan

Volume

21

Issue

7

fYear

2011

fDate

7/1/2011 12:00:00 AM

Firstpage

386

Lastpage

388

Abstract

A 24 GHz 1.4-mW double-positive-feedback voltage controlled oscillator (DPF-VCO) has been designed and realized in a 0.13 μm CMOS process. In the proposed DPF-VCO, the concept of double positive feedback loops is adopted to enhance the VCO performance and the current-mode output technique is used to obtain the output current signal. The fabricated DPF-VCO consumes only 0.78 mA, 0.97 mA, and 1.17 mA under the supply voltage of 1, 1.1, and 1.2 V, respectively, and the corresponding measured phase noise is -104dBc/Hz,-112 dBc/Hz,and-115 dBc/Hz at 1 MHz offset frequency. The best FOM of the proposed DPF-VCO is-201 dBc/Hz.

Keywords

CMOS analogue integrated circuits; current-mode circuits; feedback oscillators; negative resistance circuits; phase noise; radiofrequency integrated circuits; voltage-controlled oscillators; CMOS process; DPF-VCO; current mode output technique; double positive feedback voltage controlled oscillator; frequency 24 GHz; output current signal; phase noise measurement; power 1.4 mW; size 0.13 mum; CMOS integrated circuits; Frequency measurement; Phase noise; Power demand; Resistance; Voltage measurement; Voltage-controlled oscillators; Colpitts; double-positive-feedback voltage-controlled oscillator (DPF-VCO); negative resistance; phase noise;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2011.2156776

Filename

5871694