Design of CMOS Based Configurable Analog Block for Field Programmable Analog Array

Abstract

In this thesis, a new current mode configurable analog block (CAB) for field programmable analog array (FPAA) based on transistor level design has been proposed. The design adopts MOSFETs operating in saturation region. Three functional cells capable of performing addition, subtraction integration, multiplication, division and pass have been reported. The programming and tuning of the CAB is achieved by digitally modifying bias condition and some switches. In order to test the validity of the proposed CAB, it has been used to realize four different applications: a universal second order filter, a fourth order band pass filter, a modulation-demodulation system and a phase detector. Simulation was carried out using Tanner EDA Tools in 0.35µm standard CMOS technology. The results confirm strong agreement between theory and simulation with the main attractive features of simplicity, low power consumption and high bandwidth operation.