three transistor audio amplifier
three transistor audio amplifier:
this three transistor audio amplifier is used to amplify the sound by using transistor.here we use three transistor(2N3904,(PNP)2N2905A,2N3053) and two capacitors(47,470 micro F),one resistor(25 ohm),two diode(1N4148,1N4148) and one speaker,audio jack and 9V DC powr supply.it is the main component for the three transistor audio amplifier.
the process of the three transistor audio amplifier is, this amplifier using only 9V dc power supply.the positive terminal of the DC power supply is connected to the one speaker terminal and this is go to the collector terminal of the transistor.the base terminal of the transistor is connected with one resistor and two diode in series and the another terminal of the diode is connected with base terminal of the pnp transistor and collector terminal of the npn transistor.the emitter terminal of the npn transistor and the collector terminal of the pnp transistor is connected with the negative terminal of the power supply and one terminal of the audio jack.the positive terminal of the audio jack is connected with the base terminal of the npn transistor and one capacitor and one resistor.the resistor other terminal is connected with the one capacitor and speaker.the base terminal resistor is connected to the speaker.
when the audio jack is insert to the mobile and the sound is increasing by using this method.this the process of the three transistor audio amplifier.