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In superhetrodyne receiver, the input at mixer stage is ___________
In an AM system receiver. the mixer translates the carrier frequency fc to a fixed intermediate frequency of 450 kHz. Given a broadcast signal of frequency 900 kHz. What is the corresponding image frequency when a superhetrodyne receiver is employed with local oscillator frequency greater than the broadcast signal frequency?
Which of the following statements are correct with reference to superheterodyne receivers? (i) The main advantage of the superheterodyne receiver is its better tracking (ii) The main advantage of the superheterodyne receiver is an improvement in sensitivity (iii) The image channel rejection in superheterodyne receiver comes from IF stages only (iv) The image channel rejection in the superheterodyne receiver comes from the RF stage only Choose the correct answer from the code given below:
In a superhetrodyne receiver, the difference frequency is chosen as the IF rather than the sum frequency because ___________
The superhetrodyne principle provides selectivity at ___________ stage
In a receiver, if the noise figure of the mixer stage in the receiver is 7 dB, then the equivalent noise temperature is given that the receiver is operating at 290 K:
In a receiver the input signal is 100 V, while the internal noise at the input is 10 V. With amplification the output signal is 2 V, while the output noise is 0.4 V. The noise figure of receiver is
Most of the amplification of the received signal is obtained in a superheterodyne receiver from ________ stage.
Which code does not match? - Stage of Unification of Rajasthan Date (A) Third stage 18 April 1948 (B) Fourth stage 30 March 1948 (C) Fifth stage 15 May 1949 (D) Sixth stage 26 January 1950
A receiver is operated at a temperature of 300 K. The transistor used in the receiver have an average output resistance of 1 k. The Johnson noise voltage for a receiver with a bandwidth of 200 kHz is