1 / 11

Clil Elettronica Teacher: Anna Settanni Students: Roberto Ferri Daniele Fusaro William Palmisano

Clil Elettronica Teacher: Anna Settanni Students: Roberto Ferri Daniele Fusaro William Palmisano. Diode. Principal Points. Introduction Types of semiconductor diode s Current–voltage characteristic Rectifier Bridge. Introduction. In electronics , a diode is a two-terminal device.

rubenwilliams
Download Presentation

Clil Elettronica Teacher: Anna Settanni Students: Roberto Ferri Daniele Fusaro William Palmisano

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Clil Elettronica Teacher: Anna Settanni Students: Roberto Ferri Daniele Fusaro William Palmisano

  2. Diode

  3. Principal Points • Introduction • Types of semiconductor diodes • Current–voltage characteristic • Rectifier Bridge

  4. Introduction In electronics, a diode is a two-terminal device. Diodes have two terminals and most of them are used for their unidirectional electric current property.

  5. Types of semiconductor diodes There are a lot of types of semiconductor diodes for example the most usefull are: • Zener Diode • Schottky Diode • Diode Led (light emetting diode) • Photodiode • Varicap

  6. Circuit Simbol These are some diode symbol: Diode Led Diode Zener Diode Schottky Diode Varicap/Varactor PhotoDiode

  7. Current–voltage characteristic A semiconductor diode's current-voltage characteristic , or I–V curve, is related to the transport of carriers through the so-called depletion lover or depletion region that exists at the p/n junction between differing semiconductors. When a p-n junction is first created, conduction band (mobile) electrons from the N-doped region diffuse into the P-doped region where there is a large population of holes (places for electrons in which no electron is present) with which the electrons "recombine".

  8. Current–voltage characteristic A diode’s I–V characteristic can be approximated by four regions of operation. At very large reverse bias, beyond the peak inverse voltage or PIV, a process called reverse breakdown occurs which causes a large increase in current that usually damages the device permanently. The avalanche diode is deliberately designed for use in the avalanche region. In the zener diode, the concept of PIV is not applicable.

  9. Current–voltage characteristic

  10. Rectifier Bridge A diode bridge or bridge rectifier is an arrangement of four diodes in a bridge configuration that provides the same polarity of output voltage for either polarity of input voltage. When used in its most common application, for conversion of alternating current (AC) input into direct current (DC) output, it is known as a bridge rectifier. A bridge rectifier provides full-waves rectification from a two-wire AC input, resulting in lower cost and weight as compared to a center-tapped trasformer design. The essential feature of a diode bridge is that the polarity of the output is the same regardless of the polarity at the input. The diode bridge circuit is also known as the Graetz circuit after its inventor, physicist Leo Graetz.

  11. The End

More Related