Electronics Engineering: Diode - Essay Example

Only on StudentShare

Extract of sample
Electronics Engineering: Diode

When the proper impurities are added in trace amounts, semiconductors display interesting and useful properties. This process is usually referred to as doping. The oldest ancestor of semiconductor devices was the crystal detector that was used in early wireless radios. This device was composed of a single metal wire (often called a "cat's whisker") that would touch against a semiconductor crystal. The result was a rectifying diode that allows current to flow easily in one direction but hinders the flow in the other direction. The rectifying diode had two terminals, but by 1930 vacuum-tube diodes had pretty much replaced the smaller crystal detector. The crystal and "cat's whisker" were abandoned, and would eventually emerge as popular children's toys known as crystal radios.
The development of radar during World War II did a lot to revive the fate of crystal detectors. Though they were temperamental, crystals were better than vacuum-tube diodes at rectifying the high frequencies used by radar. During the war, a lot of effort was invested in improving semiconductors, particularly the silicon and geranium used in crystal detectors. ...
Download paper


A diode is a two-terminal semiconductor device that exhibits nonlinear current-voltage characteristics. The purpose of a diode is to permit current to flow in one direction and to prevent current flow in the opposite direction. The two terminals of a diode are referred to as the anode and the cathode…
Author : aankunding

Related Essays

Engineering Design
6 pages (1506 words) Essay
6 pages (1506 words) Assignment
Biiomedical Engineering
23 pages (5773 words) Coursework
Electronic Engineering
5 pages (1255 words) Essay
Chopper Control
12 pages (3012 words) Essay
Got a tricky question? Receive an answer from students like you! Try us!