摘要
采用SMIC 0.18μm Mixed Signal CMOS工艺设计了恒定压控增益的宽带LC压控振荡器。采用模拟式振幅负反馈的方式,通过模拟电路实现对偏置电流的负反馈控制,同时采用了通过数字控制的单刀双掷开关控制可变电容阵列的调谐,并且对固定电容单元进行开关的方法,从而实现恒定的压控增益且相邻频带之间的频率间隔近似相等。后仿真结果表明,本设计的LC VCO调谐频率范围2.15~3.03 GHz,压控增益在全部频率调谐范围内为70~80 MHz/V,相位噪声在全部频率调谐范围内低于-120.0 d Bc/Hz@1 MHz。
A broad band LC VCO with constant voltage gain was designed in SMIC 0.18 μm Mixed Signal CMOS process. This work applied an amplitude negative feedback in analog way to control the bias current of the designed VCO, thus to realize the constant voltage gain. Meanwhile, single-pole double-throw switches were employed to turn on/off the varactor array, thus to real- ize the equal space between different frequency bands. The post simulation shows that the designed LC VCO has a frequency tune range of 2.15-3.03 GHz, in which the voltage gain is 70-80 MHz/V,and the phase noise is better than -120.0 dBc/Hz@1 MHz.
作者
田密
韩婷婷
王志功
Tian Mi Han Tingting Wang Zhigong(Nanjing Electronic Equipment Institute of China Aerospace Science ＆ Industry Corp, Nanjing 210007, China Institute of RF ＆ OE ICs of Southeast University, Nanjing 210096, China)
出处
《电子技术应用》
北大核心
2017年第1期39-42,共4页
Application of Electronic Technique
