论文部分内容阅读
运用电压受限区和电流受限区的原理,提出了一种用于宽带LC-VCOs中基于恒定漏-源电压的LC-Tank幅度控制方法.通过检测交叉耦合管漏-源电压的变化值选择不同的尾偏置电压,避免LC-VCOs在高频处工作在电压受限区,达到优化相位噪声和功耗的目的.该方法应用于谐振频率为1.52～3.20GHz的LC-VCO,在3.2GHz载波处,10kHz和600kHz频偏的相位噪声为-77.0dBc/Hz和-118.4dBc/Hz,较没有幅度控制的情形分别改进了8.0dB和1.4dB,且在整个频段内的最大功耗为8.6mW.
Based on the principle of voltage limited area and current limited area, a method of LC-Tank amplitude control based on constant drain-source voltage in wideband LC-VCOs is proposed. By detecting the variation of cross-coupled tube drain-source voltage Choosing a different tail bias voltage and avoiding the LC-VCOs operating at high frequency in a voltage-limited area can achieve the purpose of optimizing phase noise and power dissipation.The method is applied to LC-VCO with resonant frequency of 1.52-3.20 GHz, At 3.2GHz carrier, the phase noise at -80kHz and 600kHz offset are -77.0dBc / Hz and -118.4dBc / Hz respectively, which are respectively 8.0dB and 1.4dB better than those without amplitude control, and the maximum power consumption in the whole frequency band Is 8.6mW.