Fm transmitter

Fm transmitter

1. PROJECT TITLE FM TRANSMITTER

2. GROUP MEMBERS: MUHAMMAD USAMA ( UW-18-EE-BSC-021) HARIS ABDULLAH (UW-18-EE-BSC-006)

3. CONTENTS Introduction Block diagram Working of FM transmitter Circuit diagram Advantages and disadvantages Applications Conclusion

4. FM TRANSMITTER Introduction : FM Transmitter : A FM radio transmitter is device whose major function is to send information from one point to another in most cases the information to be transmitted are voice music and code signals .

5. FM TRANSMITTER Block diagram:

6. FM TRANSMITTER Working of FM transmitter : Working of FM transmitter with help of different components is discuss below: Microphone : Human sound is made up of audio wave ,and audio wave is produced due to and rarefaction .Human s ound cannot travel through long distance. So audio wave is converted into electrical wave /impulse .To convert the sound wave into electrical wave , condense microphone is used.

7. FM TRANSMITTER 2. Amplification: Electrical wave, produced by microphone is very weak. Its amplitude is very low Amplifier is used to increase the amplitude of low electrical wave.

8. FM TRANSMITTER 3. Crystal oscillator: Electrical wave cannot travel through air .We use carrier wave which is produced by crystal oscillator .Carrier wave is basically a electromagnetic wave . Carrier wave is different from audio wave(electrical wave)

9. FM TRANSMITTER 4. Modulator : Modulator is used to combine electrical and carrier wave . audio sound has less frequency because it is human sound ,carrier wave has continuous frequency ,and when both combine ,it becomes modulated frequency .

10. FM TRANSMITTER 5. Antenna : In radio an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. Antenna is used to transmit the combine signal of electrical and carrier wave and you get this signal on your mobile ,radio and laptop . 6. Fm receiver: The radio wave from FM transmitter ,is propagated ,and received by FM receiver.

11. FM TRANSMITTER CIRCUIT DIAGRAM :

12. FM TRANSMITTER Advantages of the FM Transmitter: The FM transmitters are easy to use and the price is low The efficiency of the transmitter is very high It has a large operating range This transmitter will reject the noise signal from an amplitude variation .

13. FM TRANSMITTER Disadvantages of the FM Transmitter : In the FM transmitter, the huge wider channel is required. The FM transmitter and receiver will tend to be more complex

14. FM TRANSMITTER . Applications : The FM transmitters are used in the homes like sound systems in halls to fill the sound with the audio source. These are also used in cars and fitness centers. The correctional facilities have used in the FM transmitters to reduce the prison noise in common areas.

15. FM TRANSMITTER Conclusion : We can conclude that, FM is widely used because of several advantages of frequency modulation. Earlier FM was not commonly used because of lack of understand of how to benefit from FM and thus radio communications was used. There are many advantages and also disadvantages of FM. Inspite of having disadvantages, it is suitable for many applications. In order to enable the choice of the best modulation format to be made, it is required to understand the disadvantages and advantages of FM .