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Introduction to Semiconductors & Diodes

Semiconductor Diodes • A diode is a very useful non-linear device • It allows current to flow in one direction and prevents it flowing in the other Anode Cathode I Diode Operation • When a positive voltage is applied across the diode then current will flow • The diode is said to be forward biased • When a negative voltage is applied then the diode is reverse biased and no current will flow Diode Characteristic Curve Forward Biased Diode • A positive voltage is applied to circuit so current will flow • Diode effectively behaves like a short circuit when forward biased + 10V - + i 1kΩ vo - . | Introduction to Semiconductors Diodes EE106 Analogue Electronics Supplementary Notes F. O Malley April 2005 Semiconductor Diodes A diode is a very useful non-linear device It allows current to flow in one direction and prevents it flowing in the other I Diode Operation When a positive voltage is applied across the diode then current will flow The diode is said to be forward biased When a negative voltage is applied then the diode is reverse biased and no current will .