Download LAPORAN 4 SIMPLE AUDIO AMPLIFIER.pdf PDF

TitleLAPORAN 4 SIMPLE AUDIO AMPLIFIER.pdf
Tags Transistor Capacitor Electronic Circuits Diode
File Size619.6 KB
Total Pages9
Document Text Contents
Page 3

6.0. PROCEDURE







Figure 1: Audio Amplifier Circuit





6.1. Prepared all the equipment and component follow by lab sheet.

6.2. Based on circuit in figure 1 given, make the connection on the Vero Board.

6.3. Defined the emitter, collector and based of the transistors using by multimeter.

6.4. After that, solder the components of circuit using by soldering iron.

6.5. Be carefully when we are using the soldering iron.

6.6. Test circuit using a multimeter if the connection is right or wrong.

6.7. Then, applied the power supply 9V and Audio In from radio.

6.8. If the audio circuit in a good condition it must have the output. The output is the

same like the sound of radio.









C945 C945

C945

C945

2N2222

C9012

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7.0. RESULT



Overall, audio amplifier circuit that I created Connection is successful and it is supposed

to sound. However, the output sound is not too loud because the speakers are not

suitable. We should use 25 Ohm speaker to get a good result.





8.0. DISCUSSION OR ANALYSIS



Some knowledge about the experiment:



Figure 2 : Audio Amplifier Circuit

Description of circuit



 This is the circuit diagram of a simple three transistor audio amplifier that can

deliver around 100mW power to a 25 Ohm speaker.

 The diodes D1 and D2 provide a constant bias voltage for the transistors Q1 and

Q2.

 The transistor Q1 works as a preamplifier.

 Transistors Q2 and Q3 drives the speaker.

C945 C945

C945

C945

2N2222

C9012

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