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Why is the negative peak of the carrier wave discarded by a diode in demodulation?
It's caused by the action of the diode.
A diode conducts when its anode is positive to its cathode,
or...
when its cathode is negative to its anode.
The above statements are saying the same thing.
You circuit is applying the carrier wave to the anode, and taking output from the cathode.
The diode will conduct and pass the positive peaks of the carrier from its anode to its cathode and through to the load (next component/s after the diode), but diode action will not permit conduction any time when the carrrier wave swings into negative voltage on the anode.
You *could* turn the dioe around - then you would get only the *negative* peaks of the carrier wave passing through to the load.
What else can I help you with?
Am demodulator diode detector circuit pdf?
diode detector for am demodulation
Is the banded end of a diode positive or negative?
The Banded end of diode represents Cathode.If you want the diode to be forward biased then the Cathode is made more negative than Anode.For reverse biasing of Diode (Zener Diode) The Cathode is kept positive.However the mail carrier of current in the Cathode is Electrons which are negative.
Which diode does not use negative resistance in its operation?
Backward diode
Why you use negative source in emitter biasing?
to get the base- emitter junction forward bias we should connect the negative of the diode with the negative of the battery and the positive of the diode with the positive of the diode so we should connect negative source in the emitter
What is the negative leg of an LED called?
The side of any diode that must be negative in order for the diode to conduct is the "cathode".
What is diode reverse current?
the current which has negative value n passes through the diode is called as diode reverse current
Why tunnel diode are used in negative resistance region?
because that the tunnel diode is a standard pn junction diode in many respect except its highly doped pn junction so it has some characteristics in the negative resistance region another that its a standard diode
Why a Schottky diode is faster than a p-n junction diode?
Schottky diode is major charge carrier device. It has no minor charges to recover when device goes on to off or vice versa.
What is the tUnnel diode?
A thin junction diode which exhibits negative resistance under low forward bias condition is known as tunnel diode.
What is tunnel diode?
A thin junction diode which exhibits negative resistance under low forward bias condition is known as tunnel diode.
How envelope is eliminated and sine wave is produced in demodulation?
One way to demodulate an amplitude modulated signal from its carrier is to build a peak-follower. This could be a simple RC filter with a diode at the input. The voltage across the capacitor would charge to the peak value of the carrier (envelope), and then discharge through the resistor. The time constant would be selected so that the capacitor would have no "trouble" following the envelope. Since the typical ratio of signal to carrier frequency is quite high, i.e. 20kHz signal vs 1MHz carrier, the time constant can be quite short.
Why the graph of reversed biased diode is lies in third quadrant?
-- The definition of 'reverse bias' is anode negative with respect to the cathode, or negative voltage across the diode. That places the graph in negative-x territory. -- The diode simply acts as a resistor. Its unique 'diode' characteristics arise from the fact that its 'resistance' changes with different bias points, but the current through it always has the same polarity as the voltage across it. Therefor . . . -- When the voltage across it is negative, the current through it is also negative. Negative current appears on the graph in negative-y territory. -- Negative-x territory/negative-y territory is the third quadrant.
