Tunnel Diode Operation, Characteristics, Working principle and Applications

Students are much confused about different types of diodes they encountered. We have already explained Photodiodes, Zener diode, Schottky Diode, LED etc. Now, we are going to explain about Tunnel diode operation, construction, and applications etc. What is a Tunnel Diode? A Tunnel diode is a p-n junction device which exhibits negative resistance. With Negative resistance we means “By Increasing the voltage the current through it decreased“. It is also known as Esaki diodes named after Leo Esaki. He received the Nobel Prize in 1973 for the discovery of electron tunnelling effect. In part of their operating range, these diodes have Read More …

Schottky Diode working, construction, characteristics and Applications

Schottky diode is also known as the hot carrier diode is made up of semiconductor-metal junction rather than a p-n semiconductor junction. It is widely used for radio frequency, RF applications as a mixer or detector diode. In our previous articles, we explain about Zener Diode, Light emitting diode, Photodiode etc. In this article, we are going to explain Schottky diode operation, construction and factors etc in detail. It was named after German Physicist Walter H. Schottky, the barrier means the potential energy barrier for the electrons at the junction.  This diode has a low forward voltage drop usually between Read More …

Photodiode Modes of operation, working principle and Applications

Photodiode image

Photodiode is a special kind of diode convert light energy into current or voltage. It can be used to detect the presence or absence of minute quantities of light and can be calibrated very accurate for measurements. In our previous articles, we explain about LED diode, Zener Diode, P-n junction diode etc. Here we are going to explain Photodiode operation, working principle, modes etc in detail. These may be either exposed or packaged with an optical fiber connection or window to allow light to reach the sensitive part of the device. It may contain in-built lenses, optical filters and frequently uses photo Read More …

LED construction, working principle, Types, Bulbs and Advantages

Leds image

Led or Light emitting diode is a semiconductor device that emits or produces light when an electric current passes through it. Led lighting can be more versatile, efficient and long lasting as compare to compact fluorescent lightning. In our previous tutorials, we explain diodes, Zener diode, a p-n junction diode in detail. Here we are going to provide information regarding Led’s working, bulbs, construction and its types. This type of diode emits narrow bandwidth of visible light or invisible light at different colour wavelengths for remote control. It is preferable because it is small in area and to shape its radiation pattern Read More …