Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Instrumentation Amplifiers-Mesaurement and Instrumentation-Lab Mannual, Exercises of Electronic Measurement and Instrumentation

This lab manual is for Mesaurement and Instrumentation lab. It was provided by Naresh Nair at Kannur University. It includes: Instrumentation, Amplifier, Common, Mode, Rejection, Performance, Interference, Isolation, Biopotential

Typology: Exercises

2011/2012

Uploaded on 07/22/2012

shashikanth_0p3
shashikanth_0p3 🇮🇳

4.8

(8)

55 documents

1 / 15

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
docsity.com
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff

Partial preview of the text

Download Instrumentation Amplifiers-Mesaurement and Instrumentation-Lab Mannual and more Exercises Electronic Measurement and Instrumentation in PDF only on Docsity!

EE 416 Fundamentals of Biomedical Engineering Laboratory INSTRUMENTATION AMPLIFIERS | LINTRODUCTION Objectives : To observe the common mode rejection performance of instrumentation amplifier circuits using different operational amplifiers at different frequencies and to understand the concept of interference, isolation and performing different measurement techniques to see how the measurement technique effects common mode interference, Equipment: Osciloscope Signal Generator Digital Multimeter Breadboard Average Time to Complete : 3 hrs Prerequisites : knowledge on op-amps, common mode rejection ratio, amplifiers, I. BACKGROUND INFORMATION Common Mode Rejection Ratio Almost all biopotential signals are in the form of difference signals: with small amplitudes superimposed on large common mode signals, Also many transducers used in biomedical applications generate such difference signals. This is why we use difference amplifiers in biomedical instrumentation. For biopotential amplifiers, line interference is the most important problem. Since the interference in biopotential. signals is in the form of a common signal, common mode rejection performance of an instrumentation amplifier is very important. Common Mode Rejection Ration (CMRR) of an amplifier is defined as Differential Mode Gain (A,,,) CMR = 2010 Common Mode Gain (Ae,) (@) g As it is seen from the above definition either common mode gain is minimized or differential gain is maximized to maximize CMRR. But since the operational amplifier characteristic depend on frequency, the CMRR performance of the amplifier also depends on the frequency, Interference Electric power systems is the major source of artifact, and it causes interference at line frequency. There are four ways in which an electromagnetic source such as 50 Hz power lines can cause interference in biopotential signals, docsity.com