Amplifier Block Diagram. The power amplifier is concerned with driving the load which is usually a loudspeaker. The circuitry involved inside the amplifier raises the amplitude of the signal up to the desired level and then further transmits it to the receiver.

Here as we can see the transmitted signal is fed to the amplifier as input. It is so simple to build that i put it together on a stripboard in just a few hours. You only need a few capacitors to make a decent stereo amplifier out of it.

Different power amplifier stages are shown in the block diagram below.

The advantage of fixed gain is that the amplifier can be more easily designed to meet the requirements of stability and b w. The advantage of fixed gain is that the amplifier can be more easily designed to meet the requirements of stability and b w. The amplifier circuit diagram shows a 2 5w 2 stereo amplifier. Here as we can see the transmitted signal is fed to the amplifier as input.