REALIZATION OF NON-LINEAR SIGNAL PROCESSING BLOCKS, STANDARD FUNCTIONS AND APPLICATION TO CRYPTOGRAPHY

Abstract

Non-Linear signal processing circuits are used in various streams of engineering such as telecommunication, control system, digital design, biomedical, information security etc. Various types of signal processing methods such as analog or digital are used according to applications and requirements. CMOS non-linear signal processing circuits consume less power whereas bipolar non-linear circuits provide faster response and also provide wide operating range. In this dissertation linear term generator and higher order non-linear blocks such as squarer generator, cubic generator, power four generator and power five generator blocks have been implemented. The functions like sine, cosine, exponential, logarithmic, tangent hyperbolic inverse functions and the other two functions viz. Gaussian and sigmoid, which are extensively used in artificial neural network are also implemented in this dissertation. These functions are implemented in current mode since this mode is found to be more advantageous as compared to voltage mode implementation. The analog implementation of elliptic curve using these non-linear blocks is also presented in this dissertation which can be further used in Cryptography.