Delgado Restituto, ManuelRodríguez Vázquez, Ángel BenitoLiñán Reyes, Matías2020-04-292020-04-291995Delgado Restituto, M., Rodríguez Vázquez, Á.B. y Liñán Reyes, M. (1995). Experimental verification of chaotic encryption of audio using monolithic chaotic modulators. En Chaotic Circuits for Communication (98-102), Philadelphia, USA: SPIE- The International Society for Optical Engineering.0277-786X1996-756Xhttps://hdl.handle.net/11441/95977This paper reports the first experimental verification of chaotic encryption of audio signals using integrated circuits. It is based on a g m-C modulator/demodulator analog CMOS IC that implements a 3rd-order nonlinear differential equation. This has been fabricated in 2.4 micrometer double-poly technology and includes on-chip tuning circuitry based on amplitude detection. It is capable of generating controllable continuous-time chaotic signals. Also, measurements demonstrate how to exploit the synchronization between two of them for encrypted transmission. In these experiments, the worst-case signal to noise ratio of the recovered signal is greater than +40 dB (at the low corner of the audio spectrum) with less than -0.2 dB loss of the input signal power. At higher frequencies, the signal-to-noise ratio rises up to +60 dB, while retaining similar losses at the receiver.application/pdf5 p.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Chaotic CircuitsChaotic EncryptionNonlinear MicroelectronicsAnalog Integrated Circuitsinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess