Diode
current only flows in one direction
Biasing of p n junctions
Forward biased A positive voltage is applied to the p side
anode relative to the n sideGathode of
the junction
Anode positive
gathode
HIDEpositive
Reverse biased A voltage applied to the nsi.de
Cathode relative to the p side anode
Cathode negative
of the junction
anode
if cathode 0
Zero biased no voltage applied to the p n junction
, Shockley Diode Equation
Is Is e 1
Ip current through the diode
VD voltage across the diode
Is emitter saturation constant
Vp temperature dependant constant
n ideality factor usually D 1 for an ideal
diode
Diode is off ID
If Vp 0.54 OA
If VD VD on Diode is on
current only flows in one direction
Biasing of p n junctions
Forward biased A positive voltage is applied to the p side
anode relative to the n sideGathode of
the junction
Anode positive
gathode
HIDEpositive
Reverse biased A voltage applied to the nsi.de
Cathode relative to the p side anode
Cathode negative
of the junction
anode
if cathode 0
Zero biased no voltage applied to the p n junction
, Shockley Diode Equation
Is Is e 1
Ip current through the diode
VD voltage across the diode
Is emitter saturation constant
Vp temperature dependant constant
n ideality factor usually D 1 for an ideal
diode
Diode is off ID
If Vp 0.54 OA
If VD VD on Diode is on
