Block Diagram Of If Amplifier. Here we are taking an example of a loudspeaker. This amplifier has a bandpass response and it will amplify a signal with a frequency of approximately 720 khz.

Communication Receiver Block Diagram Extensions Of Superheterodyne Principle
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Here we are taking an example of a loudspeaker. Power amplifier and speaker blocks. Voltage amplification stage the input signal to the amplifier from the source will be generally in the mill volt range and it is very weak to drive the succeeding stages.

Audio amplifier increases the strength power of the audio signal.

In all practical amplifiers a number of stages are cascaded to amplify a weak signal to a sufficient level to operate the output device. Different power amplifier stages are shown in the block diagram below. Audio amplifier increases the strength power of the audio signal. In all practical amplifiers a number of stages are cascaded to amplify a weak signal to a sufficient level to operate the output device.