Diode part 2 || BASIC ELECTRONICS

Let's see diode biasing Biasing is applying a DC voltage across the diode and bringing it to the working condition If we consider a diode, the current will not flow through it unless we apply an external voltage Biasing is applying an external DC voltage across the diode and bringing it to the working condition There are two types of biasing in a diode, forward bias and reverse bias Let's see forward biasing When external DC voltage is applied to the junction is in such a direction that it cancels the potential barrier thus permitting the current to flow It is called forward biasing When external DC voltage is applied to the junction is in such a direction that it cancels the potential barrier thus permitting the current to flow It is called forward biasing Let's see how to connect forward biasing Let's see how to connect an external DC source to a diode If we connect P region with positive pole and N region with negative pole, we can say that the diode is forward biased When forward bias is applied, the positive poles in P region will move to N region Similarly, the negative poles in N region will move to P region As a result, the depletion width will decrease and the diode will start conducting when the bias voltage exceeds the potential barrier This is called forward biasing The current flowing through forward biasing is called forward current A diode is connected in forward bias Anode is connected in P region with positive terminal of battery and N region with negative terminal of battery The depletion region is shaded between P and N regions As the forward bias increases, the depletion width will decrease and the diode will start conducting when the bias voltage exceeds the potential barrier The current flowing through forward bias is called forward current In reverse biasing, the potential barrier is increased when the external DC voltage is applied to the junction This is the specialty of reverse biasing In forward biasing, the P region of the diode is connected with positive terminal of battery and N region with negative terminal of battery In reverse biasing, the P region of the diode is connected with positive terminal of battery and N region with negative terminal of battery In reverse biasing, there is a very low current conduction due to the effect of a minority carrier In reverse biasing, the P region of the diode is connected with positive terminal of battery and N region with negative terminal of battery Let's see the forward and reverse biasing of diode In reverse biasing, the P region of the diode is connected with positive terminal of battery and N region with negative terminal of battery Senor diode is a reverse biased heavily doped PN junction diode which operates in breakdown region This is the field intensity of the diode This electric field can break the covalent bonds in the diode and generate free electrons This is the field intensity of the diode Senor diode is used as a voltage regulator to protect the diode from external damage and excessive heating This is the field intensity of the diode Breaking of covalent bond is due to intense electric field across the depletion region. This greatest a large free electrons causes breakdown Breaking of covalent bond is due to collision of accelerated charge carriers with adjacent atoms. This creates free electrons Breaking of senor diode is due to negative temperature coefficient Senor breakdown occurs in highly doped diode Ideal diode is a diode which operates as a perfect conductor when forward biased and as a perfect insulator when reverse biased Ideal diode is a semiconductor device which operates as a perfect intelligent switch when shut off and turned on based on voltage applied to its junction