Frequency Tuning Range Extension in LC-VCOs Using Negative-Capacitance Circuits

被引：30

作者：

Wu, Qiyang ^{[1
]}

Quach, Tony K. ^{[2
]}

Mattamana, Aji ^{[2
]}

Elabd, Salma ^{[1
]}

Orlando, Pompei L. ^{[2
]}

Dooley, Steven R. ^{[2
]}

McCue, Jamin J. ^{[1
]}

Creech, Gregory L. ^{[1
]}

Khalil, Waleed ^{[1
]}

机构：

[1] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA

[2] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2013年 / 60卷 / 04期

关键词：

LC voltage-controlled oscillators (VCOs) (LC-VCOs); millimeter-wave integrated circuits; negative-capacitance (NC) circuits; wide-tuning-range VCOs; PHASE-LOCKED LOOP; 0.13-MU-M CMOS; TECHNOLOGY; DESIGN;

D O I：

10.1109/TCSII.2013.2251939

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：

We present an experimentally validated capacitance cancellation structure to increase the tuning range (TR) of LC voltage-controlled oscillators (VCOs) with minimal phase noise or power impact. The cancellation is based on an ultrawideband differential active negative-capacitance (NC) circuit. An NC scheme suitable for bottom-biased VCOs is analyzed and combined with a CMOS VCO to cancel the fixed capacitance in the LC tank. The NC structure is further modified to be tunable, enabling additional expansion of the VCO TR. By manipulating the quality factor (Q) of the NC tuning varactor pair, a prototype VCO achieves a maximum TR of 27% in a 130-nm technology, while dissipating 13 mA from a 0.9-V supply. The TR is the highest reported at Q-band, covering from 34.5 GHz to 45.4 GHz. Compared to the reference VCO without an NC circuit, the TR is increased by 38%. The measured worst case phase noise is -95 dBc/Hz at 1-MHz offset, and the FOMT is -184.9 dBc/Hz.

引用

页码：182 / 186

页数：5

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