ECE :: Radio Receivers
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A receiver having an RF amplifier and an IF of 450 kHz, has Q of the coils 65 and an incoming frequency of 1200 kHz. The image rejection of the receiver is
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In a radio receiver, the local oscillator is always tuned to a frequency higher than the incoming frequency to
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When a superheterodyne receiver is tuned to 455 kHz, its local oscillator provides a mixer with the input at 1010 kHz. The image frequency is
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In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The image frequency at 1000 kHz will be
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In a superheterodyne receiver, the IF stage has better selectivity than RF stage because
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An arbitrary signal m (t) has zero average value and it is bandlimited to 3.2 kHz. It is sampled at the rate of 8 K samples/S. The samples are passed through an ideal bandpass filter with centre frequency of 32 kHz and bandwidth of 6.4 kHz. The output of band pass filter is
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The purpose of incorporating a pre-selector stage in a receiver is to
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Vividh Bharati programme is transmitted in
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The image frequency of a superheterodyne receiver is
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