压控振荡器技术的回顾与展望

论述了压控振荡器技术发展的历程和趋势，介绍了SiGe压控振荡器技术。     

900MHz压控振荡器

９００ＭＨｚ压控振荡器卿忠一、概述９００ＭＨｚ个人无线电台采用多信道共用体制，自动搜索选取空闲信道，实施无控制中心移动通信。其性能优良，成本低廉。我国用户和研制生产单位对这一新系统极为关注。为实现９００ＭＨｚ频段移动通信，关键之一就是研制一个输出频谱...     

基于0.18 μm CMOS工艺的6 GHz环形压控振荡器设计

基于0.18 μmCMOS工艺设计的全差分环形压控振荡器电路,芯片总面积为0.65×0.79 mm2,1.8V电源供电,总功耗155 mW,中心频率6 GHz,调谐范围1 GHz.可应用于IEEE802.11a WLAN系统.     

CMOS电感电容压控振荡器中对称噪声滤波技术的研究

提出一种基于CMOS电感电容压控振荡器的对称噪声滤波技术。仿真结果表明．对称噪声滤波技术能够在相同的功耗下改善相位噪声6dB。应用对称噪声滤波技术设计一个4．8GHz压控振荡器，在0．25μm CMOS工艺上制造，测试结果表明在偏离载波1MHz时相位噪声为-123．66dBc／Hz，整个振荡器的功耗仅为12mW，与同类型的压控振荡器比较，取得很好的PFTN指标。     

闭环压控振荡器的设计

压控振荡器在许多电子设备中得到应用。平显火控系统中的f_d信号发生器实际上可以认为是一个压控振荡器。其输入信号是—控制电压即频偏调制电压,输出是频率与输入电压成线性关系的正弦波。开环压控振荡器对于输出频率与输入电压之间的线性关系难以保证。现在采用的ICL8038是一集成压控振荡器,其线性度在10倍程的频率范围内较好,而在更大范围内则有所下降。另外,该器件输出频率的温度稳定性不够高,特别是国产5G8038尽管价格较进口的ICL8038便宜近十倍,但温度稳定性更差。本文介绍一种闭环压控振荡器电路,以稳定输出频率与输入电压间的线性度。     

电子战系统的压控振荡器技术

技术和设计的改进产生了压控振荡器和本机振荡器这两种器件,减小了体积。降低了功耗,并改进了整机电性能。由于不断变化的威胁环境,下一代电子战系统复杂性不断地增加,给压控振荡器和本机振荡的设计人员增加了提供更复杂的分系统的重担。增宽频率覆盖范围,加快调谐响应,提高温度和频率稳定性,减小体积和输入功率是必要的。将来的趋势包括:预测干扰技术、实时调节的“灵活”控制电路,战埸电子对抗系统与其它电子战和指挥     

基于0118μm CMOS 工艺的6 GHz 环形压控振荡器设计

摘要:基于0118μmCMOS 工艺设计的全差分环形压控振荡器电路,芯片总面积为0165 ×0179 mm2 ,118V 电源供电, 总功耗155 mW,中心频率6 GHz ,调谐范围1 GHz。可应用于IEEE802111a WLAN 系统。     

11GHz CMOS环形压控振荡器设计

设计了一种全差分高速环形压控振荡器(VCO).该VCO有三级,每一级的增益是快慢通路增益的矢量叠加和,快慢通路的增益由底部电流源决定,差分控制电压通过镜像电流源控制快慢通路的各自电流,最终实现对振荡频率的调节.分析了VCO的工作原理及其相位噪声.电路采用TSMC公司0.18μm标准CMOS工艺制作.测试结果显示:芯片工作频率为10.88～11.72GHz,相位噪声为-101dBc/Hz@10MHz,输出信号抖动为3.8ps rms,在1.8V电源电压下的直流功耗约为75mW.该VCO可以应用于锁相环和频率合成器中.     

11GHz CMOS环形压控振荡器设计

设计了一种全差分高速环形压控振荡器（VCO）．该VCO有三级,每一级的增益是快慢通路增益的矢量叠加和,快慢通路的增益由底部电流源决定,差分控制电压通过镜像电流源控制快慢通路的各自电流,最终实现对振荡频率的调节．分析了VCO的工作原理及其相位噪声．电路采用TSMC公司0.18μm标准CMOS工艺制作．测试结果显示：芯片工作频率为10.88～11.72GHz,相位噪声为－101dBc/Hz@10MHz,输出信号抖动为3.8ps rms,在1.8V电源电压下的直流功耗约为75mW．该VCO可以应用于锁相环和频率合成器中．     

基于802.11a/b/g WLAN接收机前端的射频集成压控振荡器设计

为了满足WLAN接收机前端要求,设计了一种基于IEEE 802.11 a/b/g协议的RF零中频接收机第一本振3.846GHz压控振荡器.该振荡器采用TSMC0.25μm RFCMOS工艺实现,利用Hajimiri相位噪声模型对结构进行了优化,具有低相位噪声的特性.通过Cadence Spectre仿真,结果表明文中设计的3.846GHz压控振荡器功耗为10mW,1MHz和3MHz载频处的相位噪声分别为-120dBc/Hz和-131dBc/Hz,调谐电压Vtune在0～2.5V之间变化时,频率可调范围为600MHz,其性能完全符合IEEE 802.11 a/b/g协议的要求.     

智慧城轨交通通信技术的分析与展望

为解决由城轨环境特殊性导致的通信可靠性、时延性能降低以及运营效率瓶颈等问题,首先从整体运营控制的角度分析了城轨通信需求。结合新型智能运行控制技术及T2T(train to train,列车到列车)通信、5G、人工智能、移动边缘计算等新兴信息技术对城轨通信关键技术进行梳理、总结与展望;然后提出了一种新型城轨通信网络架构,最后探讨了智慧城轨通信技术的研究方向与面临的挑战,为智慧城市的发展提供研究基础。     

Design of a tunable multi-band differential LC VCO using 0.35 μm SiGe BiCMOS technology for multi-standard wireless communication systems

In this paper, an integrated 2.2-5.7 GHz multi-band differential LC VCO for multi-standard wireless communication systems was designed utilizing 0.35 μm SiGe BiCMOS technology. The topology, which combines the switching inductors and capacitors together in the same circuit, is a novel approach for wideband VCOs. Based on the post-layout simulation results, the VCO can be tuned using a DC voltage of 0 to 3.3 V for 5 different frequency bands (2.27-2.51 GHz, 2.48-2.78 GHz, 3.22-3.53 GHz, 3.48-3.91 GHz and 4.528-5.7 GHz) with a maximum bandwidth of 1.36 GHz and a minimum bandwidth of 300 MHz. The designed and simulated VCO can generate a differential output power between 0.992 and −6.087 dBm with an average power consumption of 44.21 mW including the buffers. The average second and third harmonics level were obtained as −37.21 and −47.6 dBm, respectively. The phase noise between −110.45 and −122.5 dBc/Hz, that was simulated at 1 MHz offset, can be obtained through the frequency of interest. Additionally, the figure of merit (FOM), that includes all important parameters such as the phase noise, the power consumption and the ratio of the operating frequency to the offset frequency, is between −176.48 and −181.16 and comparable or better than the ones with the other current VCOs. The main advantage of this study in comparison with the other VCOs, is covering 5 frequency bands starting from 2.27 up to 5.76 GHz without FOM and area abandonment. Output power of the fundamental frequency changes between −6.087 and 0.992 dBm, depending on the bias conditions (operating bands). Based on the post-layout simulation results, the core VCO circuit draws a current between 2.4-6.3 mA and between 11.4 and 15.3 mA with the buffer circuit from 3.3 V supply. The circuit occupies an area of 1.477 mm² on Si substrate, including DC, digital and RF pads.     

Varactor Diodeless Harmonic VCOs for GHz-Range Applications

Most radio frequency voltage-controlled harmonic oscillators are tunedby changing the capacitance of a pn-junction diode. The inadequate capacitancetuning range of the pn-junction diode severely limits the achievable frequencytuning range of the oscillator. Two methods for extending the tuning range of monolithic LC-oscillators are discussed in this paper. The first approach is touse actively synthesized capacitor based on the Miller effect instead of a pn-junction varactor diode for the VCO tuning. An analytical model is developed forstudying the capacitance tuning range and the corresponding Q-value. Inthe second approach we are using a balanced variable impedance converter for theVCO tuning. In this approach tuning is based on current steering using the Gilbertcell. Altogether nine experimental circuits have been fabricated with a 0.8 mBiCMOS process. All circuits oscillate around 2 GHz and tuning ranges exceeding30% have been measured.     

全球数字红利频谱释放现状及展望

数字红利频谱对于公众移动通信的发展有着非常重要的意义。首先,分析了全球移动通信的发展趋势,表明对频谱需求量急剧增长,特别是对数字红利频谱的需求;然后,概述了全球地面广播电视模数转换情况,从国际标准化和世界重要地区两个维度分析了全球数字红利频谱如何用于移动通信;最后,总结了全球数字红利所面临的机遇、问题和挑战,对未来数字红利频段全球合理使用提出了建议。     

第三代移动通信中的多用户检测技术

多用户检测技术可抑制多址干扰(MAI)，从而提高CDMA系统的容量和性能。多用户检测技术主要分为线性多用户检测和非线性多用户检测两种。文中对各种多用户检测的特点进行了分析比较。     

Optically controlled oscillators for millimeter-wave phased-arrayantennas

An approach for the design of optically synchronized millimeter-wave local oscillators based on a subharmonically injection-locked phase-lock-loop technique is introduced. The experimental results support the desired goal of frequency and phase coherency, phase shift control of millimeter-wave oscillators, and self-oscillating mixing to downconvert a millimeter-wave RF signal. Experimental results and theoretical analysis show the advantages of the proposed approach: large locking range of two subharmonically locked oscillators, lower FM noise degradation, and smaller phase error caused by frequency detuning