Etymologically sense diode comes from two words DI (two) and ODA (electrode), which means the two electrodes. Literally sense diode is an electronic component that has two electrodes which are called anode electrode positive polarity and electrode negative polarity called Kathoda. Diode function is closely related to the current control system voltage.
Various types of diodes made according to function, but it does not leave the diode function characteristics and specifications, such as a diode rectifier (rectifier), light emission diode (LED), Zenner diode and diode varactor.
- Rectifier diode (rectifier) serves as a rectifier voltage / current from alternating current (AC) to direct current (DC) or convert AC current into DC. This type of diodes made of silicon.
- Light emitting diode (LED) is a Solid State Lamp which is a combination of electronic devices with optical electronics, so classified in the family "Optoelectronic". There are three general functions of the use of LEDs, namely: as indicator lamps, for the transmission of modulated light signals within a certain distance, and a coupling circuit which isolated in total.
- Zener diode is a diode junction P and N are made of silicon base material. This diode is also known as Regulation Voltage Diode working in the area of reverse (quadrant III). The function of this component is usually used for securing the circuit after the Zener voltage.
- Diode varactor diode is also known as its capacity has the capacity of changing if given voltage. These diodes work in areas like Zener diode reverse. If the voltage is the voltage goes up, the capacity will drop. Varikap diodes are widely used in radio and television receivers in the sound settings (Audio).
source : http://dasarelektronika.com/pengertian-dan-fungsi-dioda-2
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