应用于GSM直接调制发射机的宽带压控振荡器  

Design of a Wideband VCO for GSM Direct Modulation Transmitter

作　　者：王豫桐[1] 林伟[1] 黄世震[1] 

机构地区：[1]福州大学福建省微电子与集成电路重点实验室,福州350002

出　　处：《微电子学》2009年第2期219-223,共5页Microelectronics

基　　金：国家自然科学基金资助项目(10871221)

摘　　要：设计了一个应用于GSM850／EGSM900／DCS1800／PCS1900四频带直接调制锁相环发射机的宽带电感电容压控振荡器，采用温度计编码控制开关电容阵列，获得了宽频率覆盖范围，通过优化获得了良好的相位噪声性能。整个电路采用TSMC0．18μm工艺实现，工作电压为3V。仿真结果表明：压控振荡器的频率范围3055-4176MHz（31％），调谐增益19MHz／V变化至44MHz／V，相对最大调谐增益的变化值为56．8%，频偏20MHz处相位噪声达到-155．7dBc／Hz以下，最大功耗30mW。A wideband LC voltage controlled oscillator （VCO） for GSM850, EGSM900,DCS1800, PCS1900 direct modulation transmitter was designed. Switched capacitor array （SCA） with thermometer-code control was proposed to obtain wider frequency coverage and better phase noise performance. The VCO was implemented in TSMC 0. 18 μm CMOS process. The circuit had a tuning range of 1 121 MHz （31%） from 3 055 MHz to 4 176 MHz with a tuning gain from 19 MHz/V to 44 MHz/V. The phase noise was better than-155.7 dBc/Hz at 20 MHz offset frequency,and its power consumption was about 30 mW at 3 V supply voltage.

关 键 词：压控振荡器 开关电容阵列 调谐增益 温度计码 噪声滤除 相位噪声 

分 类 号：TN752[电子电信—电路与系统]