1. A CMOS quadrature voltage-controlled oscillators using common-drain coupling transistors.
- Author
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Jang, Sheng‐Lyang, Liu, You‐Wei, Chang, Chia‐Wei, and Juang, Miin‐Horng
- Subjects
COMPLEMENTARY metal oxide semiconductors ,VOLTAGE-controlled oscillators ,QUADRATURE domains ,TRANSISTORS ,ELECTRIC transformers ,PROTOTYPES ,ELECTRIC oscillators - Abstract
This article presents a fully integrated quadrature cross-coupled voltage controlled oscillator (QVCO) using common-drain transistor instead of common-source transistor as a coupling device.The prototype 3.8 GHz QVCO in 0.18 μm CMOS process is proposed to generate four output phases and it uses two p-core cross-coupled VCOs and nMOS coupling devices. The proposed QVCO oscillates from 3.6 to 3.84 GHz and the power consumption is 7.24 mW at 0.74 V supply voltage. The measured phase noise is -126.19 dBc/Hz at 1 MHz offset frequency from the carrier frequency 3.745 GHz. The VCO occupies a chip area of 1.08 ×0.924 mm
2 and provides a figure of merit of -189.05 dBc/Hz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1262-1266, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27578 [ABSTRACT FROM AUTHOR]- Published
- 2013
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