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Working principle of super heterodying receiver

Please send me working principle of SUPER HETERODYING RECEIVER and its block diagram.

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  • satishkumar5 Jan 16, 2009

    It is the best answer after refering a lots of book.

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You can find it easy with google, but here is how it works...the incomeing rf signal is mixed with a signal of another frequency from the local oscillator and then passes through a non linear device (semiconductor). after passing through the nonlinear device the output will contain the original frequency,the local oscillator frequency, and frequencies equal to those added together and subtracted from each other,these signals are then passed through filters to obtain only one which will be either the rf frequency plus the local oscillator frequency or the rf frequency minus the local oscillator frequency. This new frequency is then coupled to the intermediate frequency amplifier stages where most of the amplification takes place before the audio is removed and passed to the audio stages.

Posted on Jan 15, 2009

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