← 返回 JSSC 论文列表JSSC 2007第7期Clocking & PLLs0.13μmVCO
Wideband VCO With Simultaneous Switching of Frequency Band, Active Core, and
宽带VCO设计通过切换有源核心和变容二极管实现频率范围优化。
0.13μm CMOS, 1.2V, 3.1-5.2GHz, 7.7-2.1mA, -118dBc/Hz@1MHz
宽带VCO切换有源核心可变变容二极管相位噪声调谐范围
▸切换有源核心调整负阻晶体管尺寸
▸使用可变尺寸模拟变容二极管
▸降低寄生效应提升相位噪声和调谐范围
Abstract
As the tuning range of integratedLC-VCOs increases, it becomes difficult to co-design the active negative resistance core and the varactor size optimally for the complete frequency range. The presented VCO design solves this by adjusting the size of the negative resistance transistors with a switched active core, with the additional benefit that this reduces parasitics and hence allows to achieve better phase noise and an even higher tuning range. Also the VCO gain variations are counteracted by employing an analog varactor that can change in size. The implementation in 0.13- m CMOS shows a tuning range from 3.1 to 5.2 GHz, with a power consumption varying accordingly from 7.7 to 2.1 mA from a 1.2 V supply. The measured phase noise is 118 dBc/Hz at 1 MHz from a 4-GHz carrier.