IZRADA AUDIO POJAČALA

U završnom radu opisana su pojačala snage i dane njihove karakteristike. Također dana je podjela na klase rada pojačala te njihove prednosti i nedostaci. Detaljnije su opisane klase A, B i AB jer se te klase koriste za audio pojačala. Pošto je tranzistor osnovni element pojačala, opisani su osnovni spojevi s jednim tranzistorom, na kojima se baziraju pojačala snage. Potom sam dao shemu kao prijedlog za izradu pojačala snage te simulaciju u programskom sučelju DoCircuits. Pomoću programa prikazao sam izlazni signal za različite signale na ulazu. Na kraju je prikazan graf pojačanja u odnosu na frekvenciju ulaznog signala.In the final work are described power amplifiers and their characteristics. It is also given the division by classes and their advantages and disadvantages. Class A, B and AB are described in more detail because these classes are used for audio amplifiers. Since the transistor is the basic element of the amplifier, circuits with a single transistor are described, on which power amplifiers are based. Then I gave the scheme as a suggestion for making the power amplifier and the simulation in the programming interface DoCircuits. By using the programming interface I displayed output signal for different signals at the input. At the end, the graph of amplification is compared to the frequency of the input signal