A 5GHz LC VCO with Extended Linear-Range Varactor in Purely Digital 0.15um CMOS Process

被引：0

作者：

Dec, Aleksander ^{[1
]}

Akima, Hiroshi ^{[1
]}

Suyama, Ken ^{[1
]}

机构：

[1] Epoch Microelect Inc, Tarrytown, NY 10591 USA

来源：

RFIC: 2009 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS SYMPOSIUM | 2009年

关键词：

voltage controlled oscillators; linear-range varactor;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

MOSFET varactors with two different threshold voltages are used for extending linear tuning range of a voltage controlled oscillator (VCO). This method is suitable for VCOs implemented in purely digital CMOS processes where MIM-capacitors are not available and only MOS transistors can be used for tuning element. The effectiveness of this technique is demonstrated in a 5GHz LC VCO with divide-by-2, output buffer, and integrated low-dropout voltage regulator. The VCO consumes 4mA of current and achieves a tuning range of 4.18-4.94GHz as well as phase noise of -109dBc/Hz at 1MHz from 4.5GHz carrier. The effective linear range has been extended by 38 percent.

引用

页码：511 / 514

页数：4

共 18 条

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