22-01-2011, 01:52 PM
1167.ppt (Size: 154.5 KB / Downloads: 672)
PN-Junction Diode Characteristics
Forward Bias --- External battery makes the Anode more positive than the Cathode --- Current flows in the direction of the arrow in the symbol.
Reverse Bias --- External battery makes the Cathode more positive than the Anode --- A tiny current flows opposite to the arrow in the symbol.
Series-Connected Diodes
Use 2 diodes in series to withstand higher reverse breakdown voltage.
Both diodes conduct the same reverse saturation current, Is.
Diode Characteristics
Due to differences between devices, each diode has a different voltage across it.
Would like to “Equalize” the voltages.