CMOS 2.4 µm chaotic oscillator: experimentalverification of chaotic encryption of audio
Manuel Delgado‐Restituto, M. C. Rodriguez-Linan, Angel Rodriguez-Vazquez · Electronics Letters · 1996
The Letter reports the first experimental verification of chaotic encryption of audio using custom monolithic chaotic oscillators. We use Gm–C techniques to realise a chaotic modulator/demodulator IC that implements a 3rd-order nonlinear differential equation. This has been fabricated in 2.4 µm double-poly technology and includes on-chip tuning circuitry based on amplitude detection. Measurements demonstrate how to exploit the synchronisation between two of these ICs for encrypted transmission.