varactor tuning

In practice the method has gained one or two mete increase in temperature stability by selecting the tuning varactor, which has the temperature characteristic compensated for the resonant transistor.

在实际设计中，通过选取温度特性与谐振三极管相补偿的调谐变容管，采用恒流源供电以及分频等方式，使得VCO的温度稳定度比普通VCO提高了一到两个量级。

especially, with the decrease of the thickness of the gate oxide, an irregular change of the varactor's tuning range is observed, which is due to the gate depletion of polysilicon.

在模拟中，还观察到了当栅氧厚度很薄时，多晶硅栅耗尽导致的可调电容的变化范围不规则变化的现象。

One of the most effective ways to achieve wide tuning range and low tuning sensitivity at the same time is to use a switched-capacitor bank while keeping the varactor size small in LC tank.

使用电容阵列以保持LC谐振回路中可变电容的小尺寸，是同时实现宽调谐范围和低频率敏感性的最有效方法之一。