Improved chaotic Colpitts oscillator for ultrahigh frequencies
A. Tamaševičius, Skaidra Bumelienė, Erik Lindberg · Electronics Letters · 2004
A novel version of the Colpitts oscillator is presented generating chaotic oscillations at gigahertz frequencies. In contrast to the standard oscillator the inductor is moved from the collector circuit of the transistor to the base circuit. PSpice simulations demonstrate chaos at the fundamental frequencies of 0.5, 1 and 2 GHz employing transistors with a threshold frequency of 9 GHz.