南京大学学报(自然科学版) ›› 2020, Vol. 56 ›› Issue (2): 290–295.doi: 10.13232/j.cnki.jnju.2020.02.016
• • 上一篇
低相噪、低功耗连续调谐双核压控振荡器
李英男
- 天津大学微电子学院，天津，300072
Low phase nosie and low power consumption continuous tuning dual⁃core voltage⁃controlled oscillator
Yingnan Li
- School of Microelectronics, Tianjin University, Tianjin, 300072, China
摘要：
采用GF 55 nm CMOS工艺，设计一种可应用于调频连续波(Frequency Modulated Continuous Wave，FMCW)雷达系统中的低相噪、低功耗连续调谐双核电感电容压控振荡器(Voltage?Controlled Oscillator，VCO).该VCO通过三线圈变压器将两个振荡核心和缓冲放大器相互耦合.通过双核耦合结构实现了低相位噪声，同时也保证了较宽的连续频率调谐范围.采用电流复用技术，将缓冲放大器通过中心抽头变压器与核心电路耦合，大幅降低了由双核结构引起的高功耗，同时为电路提供了较高的输出功率，解决了双核耦合VCO的质量因数(Figure of Merit，FoM)普遍较差的问题.后仿结果表明，该VCO实现了28 G~32 GHz的13%的连续频率调谐范围，相位噪声在1 MHz偏移下低至-105 dBc·Hz-1.在1.2 V电源电压下，包括缓冲放大器在内的总直流功耗仅为13.5 mW，输出功率可达4.5 dBm.电路实现了183 dBc·Hz-1的FoM.
中图分类号:
- TN722.5
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