CAJ | 학술논문

本文设计了一个应用于高频锁相环（PLL）系统的负阻LC压控振荡器，在传统LC压控振荡器基础上，通过采用二次谐波滤波技术降低了振荡器的相位噪声，并完成了电路的仿真。仿真结果表明，该压控振荡器的振荡频率在1．9—2．1GHz，其频率调节范围达到200MHz，并且在距中心频率1MHz处其相位噪声为-148．825dBc／Hz。
본문설계료일개응용우고빈쇄상배（PLL）계통적부조LC압공진탕기，재전통LC압공진탕기기출상，통과채용이차해파려파기술강저료진탕기적상위조성，병완성료전로적방진。방진결과표명，해압공진탕기적진탕빈솔재1．9—2．1GHz，기빈솔조절범위체도200MHz，병차재거중심빈솔1MHz처기상위조성위-148．825dBc／Hz。
This paper designs a negative resistance LC voltage-controlled oscillator for high-frequency PLL system. Based on the structure of conventional LC VCO, a filtration of the second harmonic technique was included to reduce the phase noise and the circuit simulation is completed by the software of Agilent＇s ADS. The simulation results show that this LC voltagecontrolled oscillator achieved to a widely turn the frequency and the range is 1.9- 2.1GHz. The phase noise away from the center frequency of 1MHz can reach -148.825dBc/Hz.