Buffer amplifier is used between one master oscillator and Harmonic generator in AM-transmitter because
A
it reduces SN ratio
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B
it amplifies signal
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C
it increases signal frequency
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D
it avoids frequency deviation in tank-circuit
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Solution
The correct option is D it avoids frequency deviation in tank-circuit Band pass filter used in amplitude modulation to allow a specific range of frequencies to be passed to the next stage of the circuit . Thus if you need a range of range 10MHZ to 50MHZ, the band pass filter will allow this range and block out either side . Band pass filter is placed after the square law device in the square law modulator to get amplitude modulated signal