Question

Buffer amplifier is used between one master oscillator and Harmonic generator in AM-transmitter because

• A. it reduces $\frac{S}{N}$ ratio
• B. it amplifies signal
• C. it increases signal frequency
• D. it avoids frequency deviation in tank-circuit

Answer 1

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