0.8 V GPS band CMOS VCO with 29% Tuning Range

Author

Cheng, Wang-Chi ; Chan, Cheong-Fat ; Pun, Kong-Pang ; Choy, Chiu-Sing

Author_Institution

Dept. of Electron. Eng., Chinese Univ. of Hong Kong

fYear

2006

fDate

4-7 Dec. 2006

Firstpage

522

Lastpage

525

Abstract

This paper presents the design and measurement results of a sub-1 V, wide-tuning range, monolithic voltage-controlled oscillator (VCO). The LC cross-coupled VCO can operate at a supply voltage at 0.8 V. The top-biased PMOS, with capacitor connected in parallel, is used in order to decrease the noise contribution in the oscillated frequency even at a low voltage supply. Moreover, an accumulation MOS varactor (Andreani and Mattisson, 2000) is adopted to provide 29 % wide tuning frequency range. With a 0.8 V supply, the 1.6 GHz A-MOS VCO consumes 11.26 mA, included VCO and output buffer, with a measured phase noise of -109.3 dBc/Hz @ 600 kHz offset

Keywords

MOS capacitors; UHF oscillators; varactors; voltage-controlled oscillators; 0.8 V; 1 V; 1.6 GHz; 11.26 mA; GPS band CMOS VCO; LC cross-coupled VCO; accumulation MOS varactor; capacitor; monolithic voltage-controlled oscillator; phase noise; top-biased PMOS; Frequency; Global Positioning System; Low voltage; MOS capacitors; Noise measurement; Phase measurement; Phase noise; Tuning; Varactors; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on

Conference_Location

Singapore

Print_ISBN

1-4244-0387-1

Type

conf

DOI

10.1109/APCCAS.2006.342523

Filename

4145446