A low supply voltage and wide-tuned CMOS Colpitts VCO

IEICE Electronics Express

Jong-Phil Hong¹ 

[1] School of Electrical Engineering, Chungbuk National University

关键词: Colpitts;    differential;    low supply;    voltage controlled oscillator;    frequency tuning range;   

DOI  :  10.1587/elex.11.20140428

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(4)This paper presents a gm-boosted differential Colpitts VCO with a switched capacitor tuning scheme which achieves low phase noise and a wide tuning range at a low supply voltage. In the proposed VCO, a voltage boosting circuit increases a turn-on resistance of the switching transistor for the capacitor array by generating higher gate bias voltage. As a result, the proposed VCO can achieve a wide frequency tuning range at a low supply voltage. The proposed VCO is implemented with 0.18-µm CMOS technology and oscillates from 3.60 to 4.14 GHz. Measurement results indicate a phase noise of �?123.65 dBc/Hz at 1-MHz offset at 3.63 GHz, while dissipating 2.53 mA from the 0.7-V supply.

【 授权许可】

Unknown