Robust Operation of a Novel Frequency Divider Using Resonant Tunneling Chaos Circuit

Abstract

We studied operating margins of the novel frequency divider using the resonant tunneling chaos circuit with respect to input signal distortions and the variations in the current-voltage characteristics of the resonant tunneling diodes (RTDs). It was shown by numerical simulation that the input signal distortions caused by harmonics which make the input signal approach the square wave and triangular wave have only a small effect on the frequency divider operation. This was confirmed using a test circuit consisting of discrete devices. Finally, it was also demonstrated by circuit simulation that this frequency divider can operate properly against the fluctuations in epitaxial growth and fabrication process conditions causing the changes of the peak to valley (p/v) current ratio and the peak current density of the RTD.