Step 23: Biasing Diodes
A diode is a device that allows current to pass on end and blocks it on the other end.
A simple example of a diode is the LED (Light emitting Diode).
A diode can be forward or reverse bias.
In a circuit where DC is the voltage source, a diode can only conduct when it's forward biased. This is because DC only travels one way, from positive to negative.
In a circuit where AC is the voltage source, we can do the following:
We can FORWARD BIAS a diode - if we want it to conduct with a positive voltage.
We can REVERSE BIAS a diode - if we want it to conduct with a negative voltage.
This is because in an AC voltage the polarity alternates from positive to negative and vice versa. So the current can travel two directions the polarities change.
A simple example of a diode is the LED (Light emitting Diode).
A diode can be forward or reverse bias.
In a circuit where DC is the voltage source, a diode can only conduct when it's forward biased. This is because DC only travels one way, from positive to negative.
In a circuit where AC is the voltage source, we can do the following:
We can FORWARD BIAS a diode - if we want it to conduct with a positive voltage.
We can REVERSE BIAS a diode - if we want it to conduct with a negative voltage.
This is because in an AC voltage the polarity alternates from positive to negative and vice versa. So the current can travel two directions the polarities change.
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