LAUSR

A dynamic frequency divider using a negative-differential-resistance (NDR) circuit combined with an inductor and a capacitor was demonstrated. This NDR circuit was made of Si-based metal-oxide-semiconductor field-effect transistor (MOS) and SiGe-based heterojunction bipolar transistor devices. The operation of this frequency divider circuit was based on the long-period behavior of the nonlinear NDR circuit generating chaos phenomena. This circuit was analyzed by numerical simulation and the results showed that different dividing ratio could be obtained by modulating the input signal frequency using the MATLAB program and the HSPICE program. Some measured results were shown to verify our analyses. This application was designed based on a standard 0.18 μm BiCMOS technique.