Source-injection serial coupled CMOS LC quadrature VCO

IEICE Electronics Express

Abumoslem Jannesari¹  Mahmoud Kamarei¹ 

[1] Integrated Circuits and Systems Laboratory, University of Tehran

关键词: VCO (voltage-controlled-oscillator);    quadrature VCO (QVCO);    coupled-oscillators;    phase noise;   

DOI  :  10.1587/elex.4.467

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(5)Cited-By(2)A novel source-injection serial-coupled (SISC) topology for designing LC quadrature voltage-controlled-oscillator (QVCO) is proposed. The proposed topology uses the advantages of the cascode-coupling QVCO and source-injection parallel-coupled (SIPC) QVCO topologies and provides a good phase noise performance with good quadrature phase accuracy. A 1.8GHz, 1.8v designed QVCO based on this topology shows a phase noise of -136dBc/Hz at 1MHz offset frequency thereby showing 5dB and 7.3dB lower phase noise than the SIPC and the cascode-coupling topologies respectively. This result is obtained from the simulation based on 0.18u CMOS technology and on-chip spiral inductor with Q of 8.

【 授权许可】

Unknown