Backward diodes are a different type of diode commonly used in electronic circuits. Diodes can gain different properties by using different manufacturing processes and different materials. One of these is backward diodes.
Backward diodes are a type of diode that combines the properties of tunnel diodes and zener diodes. They also have the ability to switch much faster than many other diode types. They are used a lot in applications that require high switching. However, they are generally suitable for lower voltage levels. This value is usually between 0.1V and 0.6V. RF applications can be shown as an example of their usage areas.
Symbol of Backward Diodes
The symbols of Backward diodes are very similar to those of standard diodes. Unlike the standard diode notation, there is an extra line at the cathode.
Structure of Backward Diode
We have already mentioned above that the structure of the backward diode is very similar to that of the tunnel diode. As the symbol shows, one part is more doped than the other part.
It shows similar characteristics to a normal diode when it works in the forward direction.
In cases where it works in the backward direction, it shows similar characteristics to a tunnel diode.
Advantages of Back Diode
The advantages of backward diodes can be listed as follows:
Back diodes are much less affected by temperature changes than general diodes. Thus, they provide much more stable circuit structures in applications with temperature changes.
The break point voltage of backward diodes is approximately 0V. In general, this value is around 0.6V for diodes.
Backward diodes have low noise level. Therefore, they provide advantages in low voltage applications.
Back diodes have higher efficiency than standard diodes. Therefore, they can provide much more efficiency in high frequency applications.
Applications of Backward Diode
Back diodes are generally advantageous in high frequency and low voltage applications. For this reason, their usage areas are generally applications that allow them to use these features. These can be exemplified as rectifier applications, high frequency RF applications, mixer applications.