【摘要】 实现了一个宽频带VHF频段CMOS VCO.其最大的改进在于将振荡器中交叉耦合MOS管分为并联可开关的若干段.这样使其特性可以在较大范围内补偿VCO调频过程中状态的变化.该VCO使用标准0.18μm CMOS工艺制作,核心版图面积约为550μm×700μm.测试结果表明该VCO频率覆盖范围为31～111MHz;功耗为0.3～6.9mW;在100kHz频偏处相位噪声约-110dBc/Hz.更多还原

【Abstract】 This paper presents a VHF CMOS VCO.The most significant improvement on the VCO is that the cross-coupled MOSFET pairs are divided into several switchable parts so the characteristics can compensate the state change that results from the frequency tuning of the oscillator.This VCO is implemented in 0.18μm CMOS with a core area of about 550μm×700μm.The test results show that the tuning range covers 31～111MHz with a power consumption between 0.3～6.9mW and a phase noise at a 100kHz offset of about -110dBc/Hz.更多还原