Low pass filter

BEB20203 SIGNAL AND SYSTEM

low-PASS FILTER

Team Members:1) Muhamad Amir Hamzah Bin Ahmad Zamri CE1202452) Muhd Iqbal Syarif bin Khairul Anuar AE1101993) Mohamad Firdaus bin Daud AE1101484) Nur Syafiah binti Tajul Urus CE1201815) Nursyazwani bt. Abd. Jalil CE120010

Section : 03

Lecturer’s Name : Prof. Madya Dr Mohammad Faiz Liew Bin Abdullah

INTRODUCTION

A low-pass filter is a filter that passes low frequency signal and selectively attenuates higher frequency signals.

It is short pulses are exceptionally rich in high frequency components, and a low pass filter can be used to filter out those high frequency components.

Example :

- Blurring of images - Digital filters for smoothing sets of data- Acoustic barriers

OBJECTIVE

To study the characteristics of passive filter by obtaining the frequency response of low-pass filter.

To measure the cut-off frequency, fc of low-pass filter.

To plot the frequency of low-pass filter by using MATLAB and compare the results with the measurement.

To study the output waveform when a certain waveform is apply to the input of the low- pass filter.

FLOW CHART

RESULT & ANALYSIS

2) FINDING THE VALUE OF THE NUMERATOR

1) CALCULATE THE VALUE OF COMPONENT

3) DESIGN CONSTRUCT CIRCUIT IN LAB

4) PLOT MAGNITUDE AND PHASE VS FREQUENCY IN MATLAB

Frequency/Hz CH2/Peak-Peak CH1/Volt(Input)

100 -38.42 5

150 -39.93 5

200 -39.93 5

250 -40.07 5

300 -40.21 5

350 -40.35 5

400 -40.5 5

450 -40.8 5

500 -40.95 5

RESULT FROM THE LAB

THE GRAPH FOR LAB RESULTS

Frequency Response Curve Using MATLAB

CONCLUSION

Based on this project we already build circuit consisting of resistors and capacitor.

The value also has been measured by using MATLAB.

There is a slightly different in the values of cut off frequency from several results because the resistors and capacitors obtained have it own tolerance.

The project has been done successfully because the objective was achieved.