In the previous sections, we have seen how modulating information is modulated and transmitted with the help of modulator and transmitter. The transmitter transmits the modulated carrier through the transmitting antenna to the air. the modulating signal thus propagated and collected by receiving antenna.
The primary requirement of any communication receiver is that it should have the ability to select the desired signal from among thousands of others present and to provide sufficient amplification to recover the modulating signal. To provide this primary requirement receiver has to carryout different functions given below:
- Collect the electromagnetic waves transmitted by the transmitter.
- Select the desired signal and reject others.
- Amplify the selected modulated carrier signal.
- Detect the modulating signal from the modulated RF signal and
- Amplify the modulating signal to operate the loud speaker.
TYPES OF AM RADIO RECEIVER
radio receivers are classified as
(a) Tuned radio frequency (TRF) receiver
(b) Super heterodyne receiver.
The TRF (Tuned Radio Frequency) receiver and super heterodyne receiver are the two main configurations of the am receivers; those have real practical or commercial significance. Most of the present day receivers use super heterodyne configuration but the TRF receivers are simple and easily understood.
we will publish detailed info regarding TRF & SHR (radio receivers) soon , keep reading.
