Design of Low Phase Noise with Wide-band VCO Using Source Capacitive Degeneration

Author

Hsu, Meng-Ting ; Liu, Chih-Yen ; Wun, Jyun-Hao

Author_Institution

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

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1

Lastpage

4

Abstract

This paper presents a completely integrated low phase noise and wide tuning range CMOS LC voltage controlled oscillator with a source capacitive degeneration and large accumulation-mode varactors(AMOS) for a wide-band receiver front-end by a TSMC 0.18-mum 1P6M CMOS process. AMOS varactors are used to maintain a large tuning range. However, the capacitors connect to source of cross-couple pairs to further reduce the parasitic capacitance and increase VCO tuning capability. The VCO consumes 11 mA from 1.2 V supply and operates with a wide-band from 3.69 - 5.75 GHz. The measured phase noise is less than -113.6 dBc /Hz at 1 MHz offset within the entire tuning range.

Keywords

CMOS integrated circuits; circuit tuning; microwave receivers; phase noise; radio receivers; varactors; voltage-controlled oscillators; AMOS; CMOS LC voltage controlled oscillator; accumulation-mode varactors; current 11 mA; frequency 3.69 GHz to 5.75 GHz; phase noise; source capacitive degeneration; tuning range; voltage 1.2 V; wide-band VCO; wide-band receiver front-end; CMOS process; Capacitors; Noise measurement; Parasitic capacitance; Phase measurement; Phase noise; Tuning; Varactors; Voltage-controlled oscillators; Wideband; CMOS; VCO; cross-coupled pair; phase noise; wide-band;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2007. APMC 2007. Asia-Pacific

Conference_Location

Bangkok

Print_ISBN

978-1-4244-0748-4

Electronic_ISBN

978-1-4244-0749-1

Type

conf

DOI

10.1109/APMC.2007.4554542

Filename

4554542