Power Amplifier 45W with HEXFET

An ideal solution for making a good, low-cost power amplifier. It's an ideal solution for creating a home cinema system. The preamplifier and the driver are supported in an operational amplifier [IC1]. The voltage drop in resistors R5 and TR2/R6 drives the output FET's gates and is proportional to the input signal level. Transistors Q1-2 function as voltage stabilizers in the supply lines, but also ensure the essential voltage drop because the IC1 should not be supplied with voltage greater than ± 18V.

Additional Content:
The circuit is designed with an operational amplifier (IC1) at its core, which serves as the preamplifier and driver. This operational amplifier is crucial to the circuit's functionality, amplifying the input signal before it is processed further. The resistors R5 and TR2/R6 are key components in determining the output of the circuit. They control the voltage drop across the output FET's gates, which is directly proportional to the input signal level. This means that changes in the input signal will result in corresponding changes in the output, ensuring accurate signal amplification.

The transistors Q1-2 play a dual role in this circuit. They not only stabilize the voltage in the supply lines, ensuring consistent power supply to the circuit, but also control the voltage drop across the IC1. This is vital as the IC1 should not be supplied with a voltage greater than ± 18V. Exceeding this voltage limit could potentially damage the IC1, leading to circuit failure.

This circuit design is an optimal solution for those looking to build a low-cost power amplifier or home cinema system. It provides a balance of cost-effectiveness and performance, making it a viable choice for both professional and amateur electronics enthusiasts. The circuit's design ensures efficient power usage and accurate signal amplification, key factors in the performance of power amplifiers and home cinema systems.A ideal solution for the make a good, low cost power amplifier. Its a ideal solution for the creation a system of home cinema. The preamplifier and the driver support in a operational amplifier [IC1]. The voltage fall in resistors R5 and TR2/R6, drive the output FET`s gates and is proportional with the input signal level. Transistors Q1-2 function as voltage stabilizers in the supply lines, but ensure also the essential voltage fall, because the IC1 it should not they are supplied with voltage bigger ± 18V.

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