Pn Junction Diode Reverse Bias Graph

When positive terminal of a voltage source is connected to the n type region and the negative terminal of the source is connected to the p type region then the pn junction is said to be in reverse biased condition. A pn junction diode is formed when a single crystal of semiconductor is doped with acceptors impurities pentavalent on one side and donor impurities trivalent on the other side.

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Figure 1 19 Reverse Biased Pn Junction

Working Of Pn Junction Diode With Biasing Characteristics

When a pn junction diode is connected in a reverse bias condition a positive ve voltage is connected to the n type material a negative ve voltage is connected to the p type material.

Pn junction diode reverse bias graph. The direction of external voltage applied in reverse bias is opposite to that of external voltage applied in forward bias. Reverse breakdown depends on the doping levels of the p and n regions. Reverse biased pn junction diode when a diode is connected in a reverse bias condition a positive voltage is applied to the n type material and a negative voltage is applied to the p type material.

After reaching breakdown voltage current grows very high and. Reverse biased pn junction. A silicon pn junction in reverse bias.

When a pn junction diode is connected reverse bias initially upto breakdown voltage current grows very very slowly with voltage. 1 forward bias and 2 reverse bias the basic difference between a forward bias and reverse bias is in the direction of applying external voltage. In reverse bias the anode terminal of the voltage source is connected to the n type pin and cathode terminal of the voltage source is connected to the p type pin of the diode.

Connecting the p type region to the negative terminal of the battery and the n type region to the positive terminal corresponds to reverse bias. This graph is called reverse bias characteristic curve of a junction diode. In the reverse bias operation the diode act like an open switch.

Forward reverse bias characteristics of pn junction diode. As the reverse bias potential to the pn junction diode increases ultimately leads to pn junction reverse voltage breakdown and the diode current is controlled by external circuit. There are two ways in which we can bias a pn junction diode.

Pn junction diode in reverse bias. This graph is called forward bias characteristic curve a junction diode. If a diode is reverse biased the voltage at the cathode is comparatively higher than at the anode.

For reverse bias plot a graph between reverse bias voltage v r column 2 and reverse current i r column 3 taking v r along x axis and i r along y axis.

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