We present a Van Der Pol (VDP) oscillator which is composed of a negative-differential-resistance (NDR) circuit, an inductor, and a capacitor. The core NDR circuit is consisted of five Si-based metal-oxide-semiconductor field-effect transistor (MOS) devices and one SiGe-based heterojunction bipolar transistor (HBT) device. When an external periodic signal is inputted in such circuit, it outputs various kinds of signal waveforms including the chaos signals and bifurcation sequences. A dynamic frequency divider circuit using the long-period behavior of the NDR-based chaos circuit is demonstrated. This circuit is designed using a standard 0.18 μm BiCMOS technique.