Design of two-stage chaotic Colpitts oscillator
W. L. Chen, Lu Zheng, Xuanfeng Song · 2016
This paper introduces a novel two-stage chaotic Colpitts oscillator. An equivalent negative resistance model is developed to assist the circuit design in this work. The negative resistance degradation at high frequencies is compensated by adding an additional negative resistance unit. The ratio of fundamental frequency f0and cut-off frequency fT can be improved over a normal one-stage chaotic Colpitts oscillator through increasing the negative resistance. Measured fundamental frequency f0and f0/fTratio is up to 2.1GHz and 0.23, respectively.