【作者】 李勇；

【导师】 赖宗声；

【作者基本信息】 华东师范大学 ， 微电子学与固体电子学， 2007， 硕士

【摘要】 随着IEEE 802.11无线局域网的颁布,Wi-Fi接入Internet的方式很快遍及了校园、家庭和机场等场所。近几年来,随着无线接入设备的快速发展,多协议(IEEE 802.11 a/b/g)无线局域网设备为全球无缝接入实现提供了可能性。作为多协议无线局域网射频接收机的重要组成部分,电感电容压控振荡器设计受到了极大的技术挑战。本文系统论述了IEEE 802.11a/b/g无线局域网射频接收机中电感电容压控振荡器设计与实现。本文首先介绍了IEEE 802.11协议以及无线局域网集成电路的设计难点,分析了电感电容压控振荡器的研究现状,并提出了一种二次变频零中频接收机结构作为本文的系统背景。接着,对集成压控振荡器基本设计理论和片上无源元件的实现进行了回顾,并对相位噪声机制进行了分析。最后,根据IEEE 802.11a/b/g协议对接收机本振性能指标要求,本文先后设计了接收机第一本振中3.846 GHz窄带压控振荡器以及第二本振中1.4/1.9-GHz双频段压控振荡器,并采用HJTC0.,8μm MixedMode/RF1P6M工艺进行芯片验证。在广泛文献调研的基础上,本文取得如下成果:1.提出二次变频零中频接收机结构及其频率方案,为本文电感电容压控振荡器的设计提供了系统背景;2.根据系统背景和IEEE 802.11a/b/g协议要求,对本文所设计的电感电容压控振荡器提出设计指标;3.采用单PMOS交叉耦合对结构,设计并实现了中心频率为3.846 GHz窄带电感电容压控振荡器;4.将谐振器开关和开关电容阵列有机地结合在一起,设计并实现了1.4/1.9-GHz双频段电感电容压控振荡器,其调谐范围高达69%(中心频率为1.76GHz,调谐频宽为1.21 GHz)。更多还原

【Abstract】 After the ratification of the IEEE 802.11 standard for wireless local area network (WLAN), the Wi-Fi hotspots are quickly becoming a popular mechanism to access the Internet on campus, at home, or in an airport. With explosive proliferation of wireless-capable devices, multi-standards (IEEE 802.11a/b/g) provide the possibility of seamless global connection. LC-Voltage-Controlled Oscillators (LC-VCO), one of the most important building blocks in multistandard WLAN receivers, are designed with large technical challenges.Design and implementation of LC-VCOs in IEEE 802.11a/b/g WLAN receiver is presented in this dissertation. IEEE 802.11 standard and design issues of WLAN ICs are firstly introduced. A dual-conversion Zero-IF receiver as our system background is proposed, followed by the analysis of design foreground of LC-VCO. An overview of VCO, on-chip passive elements and phase noise mechanisim is covered in the dissertation. According to the specification of local oscillator (LO) in the proposed receiver, a 3.846 GHz narrow-band LC-VCO in the first LO and a 1.4/1.9-GHz dual-band LC-VCO in the second LO are designed with the chip verification of HJTC 0.18μm Mixed Mode /RF 1P6M process.Characteristic works in the dissertation are summarized as follows:1. A dual-conversion zero-IF receiver and its frequency plan are proposed. The LC-VCOs designed in this dissertation are based on this system background;2. Based on system background and IEEE 802.11a/b/g requirements, the specification for designed LC-VCOs is presented.3. Design a 3.846 GHz narrow-band single-PMOS-pair LC-VCOs with chip verification.4. A 1.4/1.9-GHz dual-band LC-VCO has achieved a tuning range of 69% (center frequency is 1.76 GHz and the tuning range is 1.21 GHz) by the combination of switched resonators and switched capacitor array.更多还原