A Wide-Tuning Range Low Phase Noise LC-VCO with a High Q Switched Capacitor Array

被引：5

作者：

Wang, Yingxi ^{[1
,2
,3
]}

Hu, Shaowen ^{[1
,2
,3
]}

Qin, Mengjie ^{[1
,2
,3
]}

Liao, Lanlan ^{[1
,2
,3
]}

Xu, Haotang ^{[1
,2
,3
]}

Li, Zhongmao ^{[1
,2
,3
]}

Li, Zhiqiang ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Microelect, Beijing 100029, Peoples R China

[2] Univ Chinese Acad Sci, Sch Integrated Circuits, Beijing 100049, Peoples R China

[3] State key Lab Fabricat Technol Integrated Circuits, Beijing 100029, Peoples R China

来源：

IEICE ELECTRONICS EXPRESS | 2023年 / 20卷 / 19期

关键词：

Voltage-Controlled Oscillator (VCO); Phase Noise; Wide Tuning Range; Switched Capacitor Array (SCA); OSCILLATOR; DESIGN;

D O I：

10.1587/elex.20.20230355

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：

A fully-integrated inductance-capacitance (LC) voltage-controlled oscillator (VCO) with a wide tuning range and low phase noise was designed and demonstrated in 130 nm CMOS technology process. To achieve a higher quality factor (Q) value, a proposed switched capacitor array (SCA) combining 4-bit switched capacitors with large capacitance and 3-bit switched capacitors with small capacitance is adopted, which occupies a small area at the same time. In addition, a varactor array and a tail resistor array are used to provide flexibly dynamic VCO gain adjustment and power consumption adjustment, separately. The measurement shows a continuous tuning range of 48% from 1.9 to 3.1 GHz and consumes 8 mW of DC power from a 1.2 V supply voltage (excluding buffers). Furthermore, this design displays the phase noise of 125.63 dBc/Hz at 1 MHz offset from its 2.5 GHz oscillation frequency. The proposed VCO's measured figure-of-mer it including the tuning range (FoM ��) is-197.39 dBc/Hz at a carrier frequency of 2.5 GHz, which demonstrates the potential of the proposed VCO for application in integrated circuits.

引用

页码：1 / 6

页数：6