Ultra-Low Power Rectangular Field Programmable Analogue Arrays For Biomedical Applications

Abstract

A field programmable analogue array (FPAA) for biomedical applications is introduced in this paper. The proposed FPAA is based on operational transconductance amplifier (OTA). The FPAA consists of configurable analogue blocks (CABs) arranged in three sections. Each section implements an OTA-C filter of reconfigurable order with variable gain, and bandwidth. Direct connections between CABs within a section, and between sections are present. The proposed reconfigurable FPAA permits different connections between its sections, providing a wide range of possible applications. Allowing the implementation of full biomedical systems, such as the analogue front-end (AFE) for biopotential signal acquisition. Reconfigurability and functionality of the proposed FPAA architecture is demonstrated through mapping of low power filters and AFE on FPAA. Simulations results for a 90 nm CMOS technology are given. The simulation results of filter and AFE on FPAA are compared to off- FPAA simulations.