| 引用本文: | 齐晓斐,于杰,孙旭涛,等.低调谐增益变化的10 GHz电感电容式压控振荡器设计.[J].国防科技大学学报,2021,43(2):54-60.[点击复制] |
| QI Xiaofei,YU Jie,SUN Xutao,et al.Design of a 10 GHz LC-VCO with low tuning gain fluctuation[J].Journal of National University of Defense Technology,2021,43(2):54-60[点击复制] |
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| 低调谐增益变化的10 GHz电感电容式压控振荡器设计 |
| 齐晓斐,于杰,孙旭涛,高铭阳,张志勇,赵武 |
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(西北大学 信息科学与技术学院, 陕西 西安 710127)
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| 摘要: |
| 基于0.18 μm CMOS工艺,设计了一种应用于无线通信和雷达系统的低变化调谐增益的电感电容式压控振荡器。该电路包括分布式偏置可变电容阵列和开关电容阵列,合理选择偏置电压扩展电容-电压曲线覆盖范围,在整个调谐电压范围内,可有效降低调谐增益。三位开关电容阵列将整个可调频率范围分为8个子频带,通过控制可变电容实现子频带内频率的调谐范围。同时采用开关可变电容阵列,有效抑制了电感电容式压控振荡器调谐增益的变化。基于1P6M 0.18 μm工艺模型的后仿真结果显示该10 GHz压控振荡器调谐增益变化率表现优异,低至21.5%,调谐频率范围为9.13~11.15 GHz,同时该压控振荡器能够实现较低的直流功耗9 mW(1.8 V电源电压),相位噪声在10 GHz时为-105 dBc/Hz@1 MHz。 |
| 关键词: 压控振荡器 调谐增益 分布式偏置可变电容阵列 开关电容阵列 开关可变电容阵列 |
| DOI：10.11887/j.cn.202102008 |
| 投稿日期：2020-01-07 |
| 基金项目:国家自然科学基金资助项目(61904148)；陕西省重点研发计划资助项目(2018GY-025)；西安市科技创新计划资助项目(201805041YD19CG25(1)) |
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| Design of a 10 GHz LC-VCO with low tuning gain fluctuation |
| QI Xiaofei, YU Jie, SUN Xutao, GAO Mingyang, ZHANG Zhiyong, ZHAO Wu |
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(School of Information Science and Technology, Northwest University, Xi′an 710127, China)
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| Abstract: |
| Based on 0.18 μm CMOS process, a low-variable tuning gain LC-VCO(inductance capacitance-voltage controlled oscillator) was designed for wireless communication and radar systems. The circuit includes a distributed bias varactor array and a switched capacitor array, a reasonable selection of the bias voltage can achieve the purpose of expanding the C-V(capacitance-voltage) curve, thereby effectively reducing the tuning gain within the entire tuning voltage range. The three-bit switched capacitor array divides the entire adjustable frequency range into 8 sub-bands, which is implemented by controlling the varactor array. And the switched varactor array is adopted, which can effectively suppress the variation of the LC-VCO tuning gain. Based on the model of 1P6M 0.18 μm technology, the post-layout simulation results show the good performance on property of tuning gain variation rate, which is 21.5% with the frequency tuning range from 9.13 GHz to 11.15 GHz, at the same time, the VCO DC power consumption is 9 mW with 1.8 V supply voltage, the phase noise is -105 dBc/Hz@1 MHz when the VCO oscillating frequency is around 10 GHz. |
| Keywords: VCO tuning gain distributed biased varactor array switched capacitor array switched varactor array |
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