Class A Amplifier Circuit Diagram. The circuit diagram for tip35c audio power amplifier is shown below. The circuit diagram of a two stage single ended class a power amplifier is shown above.

From the above figure it can be observed that the transformer is present at the collector as a load. The circuit diagram of a two stage single ended class a power amplifier is shown above. A transistor acts as an amplifier by amplifying the input signal.

The use of transformer permits the impedance matching resulting in the transference of maximum power to the load e g.

Working of tip35c audio power amplifier. Since the transistors in class a amplifier are forward biased all the time few current will flow through them even though there is no input signal and this is the main reason for its poor efficiency. They form a voltage divider network which supplies the base of the transistor with a voltage 0 7v higher than the negative maximum amplitude swing of the input signal. Circuit diagram for class a amplifier using tip35c.