锁相环系统中压控振荡器的设计与分析

2009 International Conference on Networks Security, Wireless Communications and Trusted Computing Pub Date : 2009-04-25 DOI:10.1109/NSWCTC.2009.392

Xiu-long Wu, Jun-ning Chen, Meng Jian

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引用次数: 0

摘要

研究了一种用于锁相环系统的宽带低噪声压控振荡器，包括谐波滤波电阻和源阻尼电阻，以降低相位噪声和功耗。背靠背变容管拓扑被认为是一种合适的解决方案来线性化油箱电容。幅相噪声转换得到了极大的衰减。采用0.35um CMOS技术在Mentor Graphics Eldo-RF环境下对电路进行仿真，仿真结果表明，该振荡器的相位噪声可达-119.5dBc/Hz@1MHz, 2.4GHz时功耗为3.0mw。

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Design and Analysis of VCO in PLL System

A wide-bandwidth low-noise VCO used in PLL system was investigated, including a harmonic filtering resistor and source damping resistors to reduce the phase noise and power dissipation. The back-to-back varactor topology is identified as a suitable solution to linearize the tank capacitance. The amplitude to phase noise conversion is greatly attenuated. The circuit was simulated using 0.35um CMOS technology in Mentor Graphics Eldo-RF environment, the simulation results show that the phase noise of the oscillator can reach -119.5dBc/Hz@1MHz, the power dissipation is 3.0mw at 2.4GHz.

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2009 International Conference on Networks Security, Wireless Communications and Trusted Computing

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