How the block diagram of an AM transmitter operates?
The block diagram of AM transmitter is shown in the following figure. The working of AM transmitter can be explained as follows. The audio signal from the output of the microphone is sent to the pre-amplifier, which boosts the level of the modulating signal. This wave is finally passed to the antenna to be transmitted.
What is AM transmitter and receiver?
The amplitude-modulated (AM) transmitter produces an electromagnetic carrier wave whose amplitude is modulated (varied at an audio rate), and which travels through the other to a radio receiver.
What is AM modulation and block diagram?
Amplitude Modulation Block Diagram These are also called as baseband signals as these are modulated with the carrier signals. These two signals are combined in a modulator. The modulator considers the instant amplitude of the modulating signal and modifies it as per the amplitude of the carrier signal.
Which is the first block in a radio transmitter?
The first block is the conventional crystal oscillator and then the final power amplifier. A power supply is provided for the oscillator and the final power amplifier. Figure 6. A block diagram representing various stages of a basic continuous wave radio transmitter.
How does a low level AM transmitter work?
Figure shows the block diagram of a low-level AM transmitter. The low-level AM transmitter shown in the figure (b) is similar to a high-level transmitter, except that the powers of the carrier and audio signals are not amplified. These two signals are directly applied to the modulated class C power amplifier.
How does an AM transmitter work on an antenna?
AM transmitter takes the audio signal as an input and delivers amplitude modulated wave to the antenna as an output to be transmitted. The audio signal from the output is sent to the pre-amplifier, which boosts the level of the modulating signal. The RF oscillator generates the carrier signal.
Which is the output stage of an AM transmitter?
This is the output stage of the transmitter. The modulating audio signal and the carrier signal, after power amplification, are applied to this modulating stage. The modulation takes place at this stage. The class C amplifier also amplifies the power of the AM signal to the reacquired transmitting power.