Analogue VLSI techniques in securing constrained devices

Abstract

This thesis proposes an alternate methodology for designing digital sequential circuit by analog integrated circuit technique. Traditional sequential circuit is built by lots of Flip-flop and the power consumption depends on the clock frequency. Nowadays, many devices require high speed, low voltage and low power performance, especially for RFID. Traditional methodology hardly reaches these requirements. The new analog continuous-time signal processing concept may be the better way to achieve that. The Analog Computational "soft-gates" Circuit, Analog Artificial Neural Networks(ANN) and current mode filter have been previously proposed, but an integrated set of those analog circuits is still lacking. In this project, an analog Linear Feedback Shift Registers(LFSR) which based on the "softgates" and log-domain filter integrated in a 0.6um BiCMOS process is presented.