Circuitos embebidos aplicados a equipos médicos

Abstract

This thesis describes the design guidelines from two medical teams, electrocardiogram and pulse oximetry using embedded logic circuitry such as FPGA and microcontrollers, digital filters used to filter the signals obtained from analog converters to digital, graphic obtaining the data is displayed in a graphic display GLCD, and has an interface to send data to a PC through a port USB 2 at full speed.

The digital filters used are FIR filters, these filters are chosen to be linear and time invariant, developed with 40 coefficients FIR filters, these filters were implemented in the FPGA, use a FPGA that has implemented only 20 multipliers For the implementation we used the VHDL language and algorithmic state machines in order to control the 20 boxes and get the 40 products.

Filtered data in the stage of the FPGA, are taken to a microcontroller that is responsible for managing the data, can lead to a graphic display GLCD, and so we can see the signal and obtained values or you can send the data to a PC right through USB port and software right through it can see the graphics on the PC.