Design of high performance and wide-band VCO with transformer feedback

Author

Hsu, Meng-Ting ; Li, Hong-Jyun

Author_Institution

Dept. & Inst. of Electron. Eng., Nat. Yunlin Univ. of Sci. & Technol., Douliou

fYear

2008

fDate

16-20 Dec. 2008

Firstpage

1

Lastpage

4

Abstract

This paper presents a very low supply voltage, low phase noise and wide tuning range CMOS LC voltage-controlled oscillator with a transformer feedback for a wide-band front-end receiver by a standard 0.18-mum CMOS process. The VCO take an optimum differential transformer to achieve maximize quality factor and minimize the chip area and switching capacitor module are used to maintain a large tuning range. The VCO core power consumption is 6.9 mW from 0.6 V supply and operates with a wide-band from 4.16-5.47 GHz. The measured phase noise is -111.5 dBc/Hz at 1 MHz offset from the carrier frequency at 5.45 GHz.

Keywords

CMOS analogue integrated circuits; Q-factor; capacitor switching; differential transformers; feedback; power transformers; voltage-controlled oscillators; CMOS LC voltage-controlled oscillator; frequency 4.16 GHz to 5.47 GHz; low phase noise; power 6.9 mW; power consumption; quality factor; size 0.18 mum; supply voltage; switching capacitor module; transformer feedback; voltage 0.6 V; wide tuning range; wide-band front-end receiver; wideband VCO; CMOS process; Capacitors; Feedback; Low voltage; Phase noise; Q factor; Transformer cores; Tuning; Voltage-controlled oscillators; Wideband; CMOS VCO; Low Voltage; Switch Capacitor Module; Transformer Feedback;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2008. APMC 2008. Asia-Pacific

Conference_Location

Macau

Print_ISBN

978-1-4244-2641-6

Electronic_ISBN

978-1-4244-2642-3

Type

conf

DOI

10.1109/APMC.2008.4958309

Filename

4958309