A FPGA-Based Smell Sensing System for Micromachined Gas Sensor Application

VHDL code is one of design entry through FPGA. In this paper, VHDL code for smell sensing system that has capable of discriminating between acetone, ethanol and methanol is described. The smell of these VOCs samples are sensed using micromachined gas sensor. Xilinx Foundation Series 2.1 is used as an implementation's software to design and compile the VHDL code for this application. Based on map report it is found that the entire system require 165 out of 400 CLB that occupy 41% of its overall CLB. The maximum frequency that allowed in this system is 33 MHz.