采用新型差分有源电感的宽调谐范围低相位噪声VCO

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关键词：压控振荡器；有源电感；高集成度；调谐范围；相位噪声；优值

中图分类号：TN432;TN752

文献标识码：A

DOI：10.14106/j.cnki.1001-2028.2025.1310

引用格式：王雪， 张万荣， 宋金达， 等. 采用新型差分有源电感的宽调谐范围低相位噪声VCO [J]. 电子元件与材料， 2025， 44（1）： 79-87.

Reference format：  WANG Xue， ZHANG Wanrong， SONG Jinda， et al. A VCO with wide tuning range and low phase noise using novel differential active inductor [J]. Electronic Components and Materials， 2025， 44（1）： 79-87.

A VCO with wide tuning range and low phase noise using novel

differential active inductor

WANG Xue， ZHANG Wanrong， SONG Jinda， ZHANG Hui， CHU Shangxun

（College of Information Science and Technology， Beijing University of Technology， Beijing 100124， China）

Abstract： A novel differential active inductor （DAI） based inductor-capacitor type voltage-controlled oscillator （LAIC VCO） with small area， wide tuning range and low phase noise was proposed. The DAI was mainly composed of a differential positive transconductor， two improved negative transconductors and two feedback resistors， so as to obtain tunable inductance while maintaining high Q value and low noise characteristics. Subsequently， the DAI was employed to replace the passive LC resonator in VCO in order to not only reduce the chip area， but also extend the tuning range of oscillation frequency and reduce the phase noise. In addition， a RC filter negative resistance generation circuit in LAIC VCO was utilized to filter the noise current flowing into LAIC resonator and further reduce the phase noise. Based on the 0.18 μm RF CMOS process of TSMC， the schematic simulation verification， layout design and post-layout simulation verification of the LAIC VCO were carried out by using Cadence design tool. The schematic simulation results indicate that the oscillation frequency can be tuned from 0.48 GHz to 3.24 GHz with a large tuning range of 148.39%. At the frequency offset of 1 MHz， the phase noise range is from -75.9 dBc/Hz to -95.4 dBc/Hz. Finally， the best figure of merit of -165 dBc/Hz is achieved. The post-layout simulation results confirm that better performance can be achieved with the proposed LAIC VCO circuit

Keywords： voltage-controlled oscillator; active inductor; high integration level; tuning range; phase noise; figure of merit

随着无线通信系统的快速发展，对具有低成本、高效能、优异噪声且能够在不同频段下工作的射频收发器的需求愈加强烈，这需要其中的核心部件——射频电感-电容型压控振荡器（LC VCO）电路具有小的面积、合理的相位噪声特性以及宽的频率调谐范围等性能[1-4]。（剩余10257字）