一种中心频率可调的VCO电路设计
A Center Frequency Adjustable VCO Circuit Design
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摘要: 采用0.18μm CMOS工艺设计了一种用于高速锁相环系统的压控振荡器 (VCO) 电路, 该电路的中心频率可根据需要进行调节.电路采用SMIC 0.18μm工艺模型, 使用Cadence的Spectre工具进行了仿真, 仿真结果表明, 该电路可工作在2.125~3.125 GHz范围内, 在5 MHz频偏处的相位噪声为-105 dBc/Hz.Abstract: A Voltage-controlled oscillator (VCO) for high speed phase-locked loops system designed with 0.18 μm CMOS technology is presented in this paper.The center frequency of the circuit can be adjusted as needed.The circuit is simulated with SMIC 0.18μm CMOS model by Virtuoso AMS Simulator.The results of simulation show that the performance of the VCO has achieved the design requirements completely which are 2.125~3.125 GHz output frequency range, -105dBc/Hz SSB (Single Side-Band) phase noise at a 5MHz offset.
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