# Diode 

shottky, zener, led

##### Definition

A diode is a two-terminal electronic component that conducts primarily in one direction.

Diode
Symbol #####################################################################################################################################################################################
Properties passive
Equations $u_D = u_T \cdot \ln \left(\frac{i_D}{I_S} + 1 \right)$
$i_D = I_S \cdot \left( \exp \left(\frac{u_D}{U_T}\right) -1 \right)$

## Shottky Diode

A Schottky diode has a low forward voltage and allows very fast switching.

$I=I_\mathrm{S} \left( e^\frac{V_\text{D}}{n V_\text{T}} - 1 \right)$

## Zener Diode

A Zener Diode does not only conduct in the forward direction but also allows the current to flow in the reverse direction, when the so-called “Zener voltage” is reached.

## Light Emitting Diode (LED)

The wavelength of the diode depends on the energy band gap in the semiconductor.