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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.
A wide band VHF band CMOS VCO is realized.The biggest improvement lies in that the cross-coupled MOS tube in the oscillator is divided into several sections that can be switched in parallel, so that its characteristics can compensate for the change of the state during the VCO frequency modulation in a wide range . The VCO is fabricated using a standard 0.18μm CMOS process and has a core layout area of approximately 550μm × 700μm. The test results show that the VCO frequency range is from 31 to 111MHz; power consumption is 0.3 to 6.9mW; 110dBc / Hz.