![]() ![]() Resistor R3 provides collector to base bias for Q1 and C3 is an AC by pass capacitor for the collector resistor R4. The audio input is coupled to the base of Q1 through resistor R1 and capacitor C1. Transistor Q1 with its associated components is wired as a pre amplifier stage. The circuit shown here is suitable for small radio receivers, audio players, intercom, telephone etc. Up to 78% efficiency is possible with class AB designs and cross over distortion is reduced. In class AB operation each output device conducts more than half of the input signal cycle. Description.Ī very simple and easy to build class AB audio amplifier using four transistors is shown here. More over the value of the components are not very critical and slight variations in it will not affect the performance. The main feature of these circuits is that they all are just basic designs and the components used can be easily obtained from your junk box. These are circuits that can be used in a lot of low scale applications. ![]() A Low cost amplifier circuit using Transistor So you may keep visiting this post in future for more updates. ![]() This article is solely dedicated to publish more transistor amplifier circuits. This article is a list of various types of amplifier circuits built using Transistors alone.This includes a Class AB amplifier using 4 transistors, then we have a headphone amplifier circuit and finally a low power amplifier using transistor. ![]()
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