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  • Need help in AM demodulation Circuit

    qhy

    Member

    Updated: Oct 26, 2024
    Views: 1.3K
    Im a first year electrical student and i need help to construct a circuit to demodulate modulated AM signal. Please kindly helps if you have any idea about what simple circuit can i build (even the existing one) except the envelope detector that consist of 1diode 1resistor and 1capacitor.
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Replies

  • Jeffrey Arulraj

    Member • May 23, 2013

    <a href="https://www.circuitstoday.com/am-receiver-circuit" target="_blank" rel="nofollow noopener noreferrer">AM receiver circuit</a>

    Have a nice day Googling friend here is a simple circuit
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  • qhy

    Member • May 23, 2013

    Conqueror
    <a href="https://www.circuitstoday.com/am-receiver-circuit" target="_blank" rel="nofollow noopener noreferrer">AM receiver circuit</a>

    Have a nice day Googling friend here is a simple circuit
    can i noe where is the input audio in the circuit?sorry im really weak in circuit.
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  • Jeffrey Arulraj

    Member • May 23, 2013

    Hey friend the Variable capacitor is used as a tuner for the circuit that will automatically receive radio signal from air AM demodulator
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  • qhy

    Member • May 23, 2013

    Conqueror
    Hey friend the Variable capacitor is used as a tuner for the circuit that will automatically receive radio signal from air AM demodulator
    Hey thanks,i've tried to take out the capacitor and inductor and connect it to a modulated signal in multisim but the output waveform is actually a square wave which is not identical to the desired output of demodulation circuit.
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  • Jeffrey Arulraj

    Member • May 23, 2013

    Hey friend the square wave is due to clipping of the square

    Did you for sure use BC 549 in the place for your transistor Cause every transistor has its own operating Voltage
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  • qhy

    Member • May 23, 2013

    Conqueror
    Hey friend the square wave is due to clipping of the square

    Did you for sure use BC 549 in the place for your transistor Cause every transistor has its own operating Voltage
    [​IMG]
    Ya Im kinda sure
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  • Jeffrey Arulraj

    Member • May 23, 2013

    Image is not visible to Me friend Can you pls post it again

    PS: Pls upload your ckt as a Jpg file using Upload file option near post reply button
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  • qhy

    Member • May 23, 2013

    Maybe because im still a newbie and i dont really have a upload file button but i've sent it to ur ymail mailbox.Thanks so much for the help
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  • Jeffrey Arulraj

    Member • May 23, 2013

    Hey pls change the Frequency input of the circuit it is not 100Hz to 1kHz

    This design is only for frequency 550kHz to 1100kHz

    Set that and you will get your op as you need
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  • techlib

    Member • May 24, 2013

    Here is a simple AM demodulator circuit. The output can be directly connected to an amplifier.
    #-Link-Snipped-#
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