A mismatch compensation circuit for CMOS quadrature VCO phase error

Title:	A mismatch compensation circuit for CMOS quadrature VCO phase error
Authors:	Lee, Han-Jian Chen, Che-Sheng Wuen, Wen-Shen Wen, Kuei-Ann 電子工程學系及電子研究所 Department of Electronics Engineering and Institute of Electronics
Keywords:	voltage controlled oscillators;quadrature phase error;compensation
Issue Date:	2007
Abstract:	This paper presents an analysis of phase errors; in LC quadrature VCO with a common-mode model. A mismatch compensation circuit is proposed to alleviate phase errors due to common-mode transconductance mismatch. With the compensation circuit, quardature phase errors and image rejection ration rate (IRR) are improved about 1.5 degrees and 4.7dB, respectively. The compensation circuit consumes 1.1mW.
URI:	http://hdl.handle.net/11536/12156
ISBN:	978-1-4244-1448-2
Journal:	2007 INTERNATIONAL SYMPOSIUM ON SIGNALS, SYSTEMS AND ELECTRONICS, VOLS 1 AND 2
Begin Page:	482
End Page:	485
Appears in Collections:	Conferences Paper