BIASING THE PN JUNCTION

Biasing the PN Junction
 Biasing means applying a fixed Direct
electric component (current or voltage)

 The primary usefulness of a pn junction
is its ability to allow current in only one
direction

 There are two types of PN junction biasing
 Forward Bias


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, Reverse Bias




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, Forward Bias
 Permits current across the pn-junction
 (-ve) terminal of the battery is connected
to the n region (Cathode)
 (+ve) terminal of the battery is connected
to the p region (Anode)
 The battery pushes conduction electrons
in n- region towards the junction while
holes in the p- region are pushed towards
the junction

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, Forward Bias
…..
n-region
p-
region




Hole t limiting Resistor
current
Curren
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