1. ECG ELECTROCARDIOGRAM Eletrocardiogram Roshan Mani

2. Principles Of Electrocardiograph Electrocardiograph is the instrument that records the electrical activity of the heart Electrocardiogram (ECG) is the record of that activity Roshan Mani

3. ELECTRICAL ACTIVITY OF HEART REPOLARIZATION DEPOLARIZATION R P T Q S R Tachycardia HR > 120bpm Bradycardia HR < 40bpm Roshan Mani

4. P WAVE Q WAVE R WAVE 0.25mV 25% OF R WAVE 1.60mV AMPLITUDE T WAVE 0.1 TO 0.5 mV DURATION PR INTERVAL ST INTERVAL QRS INTERVAL 0.12 0.20 sec 0.35 0.44 sec 0.05 0.15 sec 0.09 sec QT INTERVAL Roshan Mani

5. ECG Lead Configuration LEAD 1st LEAD 2nd LEAD 3rd Roshan Mani

6. ECG BLOCK DIAGRAM ISOLATION CIRCUIT INSTRUMENTATION AMP. FILTER CIRCUIT CRO/MONITOR ELECTRODE Roshan Mani

7. INSTRUMENTATION AMPLIFIER (AD620) Gain equation: Gain Set with One External Resistor (Gain Range 1 to 1000); 50mV Input Offset Voltage; 100 dB min Common-Mode Rejection Ratio (G = 10); low noise; 120 kHz Bandwidth (G = 100). Make vs. Buy SALIENT FEATURES The AD620 is a low cost, high accuracy instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. Furthermore, the AD620 features 8-lead SOIC and DIP packaging that is smaller than discrete designs and offers lower power (only 1.3 mA max supply current), making it a good fit for battery-powered, portable (or remote) applications Roshan Mani

8. ISOLATION CIRCUIT Isolation is realized in the following technologies: Transformer isolation Opto-isolation. Complete galvanic separation between the input stage (patient) and the remaining part of the measure equipment. Roshan Mani

9. AD705 &TL082 APPLICATIONS Low Frequency Active Filters Precision Instrumentation Precision Integrators PRODUCT DESCRIPTION The AD705 is a low power bipolar op amp that has the low input bias current of a BiFET amplifier but which offers a significantly lower IB drift over temperature. The AD705 offers many of the advantages of BiFET and bipolar op amps without their inherent disadvantages Roshan Mani

10. FILTERS ANALOG FILTER DIGITAL FILTER PASSIVE FILTER ACTIVE FILTER FIR FILTER IIR FILTER C + + v+ vi o R1 R2 + 1 + vo Roshan Mani

11. CIRCUIT MAKER WHAT IS CIRCUIT MAKER????? WHY SHOULD WE USE CIRCUIT MAKER CIRCUIT MAKER IS A POWERFUL TOOL TO SIMULATE ALL ELECTRIC CIRCUITS. WE CAN SEE TIME AND FREQUENCY RESPONSE OF CIRCUITS. IT IS VERY EASY TO USE. ALL ESSENTIAL COMPONANT ARE AVAILABLE NO REQUIRMENT OF PHYSICAL INSTRUMENT. TROUBLESHOOTING IS VERY EASY. Roshan Mani

12. ECG CIRCUIT ON CIRCUIT MAKER Source & lead AD620 AMP. FILTER Roshan Mani

13. EAGEL PCB DESIGN SOFTWARE EAGEL IS A PCB DESIGN SOFTWARE IT IS USED TO REDUCE COMPLEXITY IN PCB DESIGNING BECAUSE IT GIVES OPTIMUM DESIGN BY USING EAGEL WE CAN DESIGN 2 LAYER TO 16 LAYERS PCB. Roshan Mani

14. T H A N K Y O U Roshan Mani