Zener Diode Basic Operation And Applications Diode Electronic Engineering Voltage Regulator
The above figure is the circuit diagram of zener diode. The vi characteristic graph of the zener diode is shown in the figure below. These are normally termed as v i characteristics. When we enter a forward bias voltage. The zener diode always keeps the voltage drop across it at 3v. As the reverse voltage increases to the predetermined breakdown voltage vz current starts flowing through the diode. A zener diode operates just like a normal diode when it is forward biased. See an example of the basic zener diode between a forward bias a and the reverse bias b. Zener diode is highly doped thus its depletion width is very thin. Due to this more current flows through a zener diode as compared to a normal junction diode.
In the reverse bias direction there is practically no reverse current flow until the breakdown voltage is reached.
Look at the circuit a. Zener diode v i characteristics curve. This curve shows that the zener diode when connected in forwarding bias behaves like an ordinary diode. The above diagram shows the v i characteristics of the zener diode behavior. One has to connect the highly doped junction in reverse bias. At the anode pin has more.
In reverse biasing the p type material of the diode is connected with the negative terminal of the supply and the n type material is connected with the positive terminal of the supply. In the reverse bias direction there is practically no reverse current flow until the breakdown voltage is reached. Zener breakdown voltage is voltage level at this zener diode starts the current conduction in reverse bias. When the diode is connected in forward bias diode acts as a normal diode. But when the reverse voltage applies across it and the reverse voltage rises beyond the predetermined rating the zener breakdown occurs in the diode. Due to this more current flows through a zener diode as compared to a normal junction diode. As the reverse voltage increases to the predetermined breakdown voltage vz current starts flowing through the diode. These are normally termed as v i characteristics. However when connected in reverse biased mode a small leakage current flows through the diode. The circuit can be represented as follows.
Basic zener diode forward bias and the reverse bias. Due to this more current flows through a zener diode as compared to a normal junction diode. We have learned that if we apply an external voltage higher than the barrier potential of pn junction diode it will start conducting which means it will start. The diode consists of a very thin depletion region as it is made up of heavily doped semiconductor. In the forward bias direction the zener diode behaves like an ordinary silicon diode. Look at the circuit a. The graphical representation can give basic characteristics. As per the above analysis it is evident that during forwarding bias zener diode characteristics will. The zener diode has its application in reverse biasing. One has to connect the highly doped junction in reverse bias.
Zener breakdown voltage is voltage level at this zener diode starts the current conduction in reverse bias. One has to connect the highly doped junction in reverse bias. The breakdown voltage or zener voltage v z. The above figure is the circuit diagram of zener diode. In the forward bias direction the zener diode behaves like an ordinary silicon diode. When the reverse bias voltage is greater than a predetermined voltage then the zener breakdown voltage occurs. When we enter a forward bias voltage. When this occurs there is a sharp increase in reverse current. The above diagram shows the v i characteristics of the zener diode behavior. Now all we need to do is understand how the pn junction diode behaves when we increase the voltage levels from 0 to say 10 volts or 100 volts.
However when connected in reverse biased mode a small leakage current flows through the diode. The zener diode has its application in reverse biasing. A zener diode operates just like a normal diode when it is forward biased. See an example of the basic zener diode between a forward bias a and the reverse bias b. The circuit can be represented as follows. In the forward bias direction the zener diode behaves like an ordinary silicon diode. We have learned that if we apply an external voltage higher than the barrier potential of pn junction diode it will start conducting which means it will start. When this occurs there is a sharp increase in reverse current. Basic zener diode forward bias and the reverse bias. Zener diode v i characteristics curve.
When the reverse bias voltage is greater than a predetermined voltage then the zener breakdown voltage occurs. Look at the circuit a. As per the above analysis it is evident that during forwarding bias zener diode characteristics will. When this occurs there is a sharp increase in reverse current. This curve shows that the zener diode when connected in forwarding bias behaves like an ordinary diode. The above figure is the circuit diagram of zener diode. When we enter a forward bias voltage. In the reverse bias direction there is practically no reverse current flow until the breakdown voltage is reached. As the reverse voltage increases to the predetermined breakdown voltage vz current starts flowing through the diode. It specifically acts in the breakdown region in the reverse biased condition.
