What is conclusion of pn junction diode?
Conclusion about PN junction characteristics During forward bias, the diode conducts current with increase in voltage. During reverse bias, the diode does not conduct with increase in voltage (break down usually results in damage of diode).
What is difference between silicon and germanium diode?
A Silicon Diode is a semiconductor that has both positive and negative charge polarity and can allow an electrical current to flow in one direction whilst restricting another. A Germanium Diode works in the same way but has a low forward voltage which results in it being a low power loss and an efficient diode.
What is the characteristics of silicon diode?
The primary difference between silicon and germanium diodes is the voltage needed for the diode to turn on (or become “forward-biased”). Silicon diodes require 0.7 volts to become forward-biased, whereas germanium diodes require only 0.3 volts to become forward-biased.
Why is silicon preferred over germanium in diode?
The structure of Germanium crystals will be destroyed at higher temperature. However, Silicon crystals are not easily damaged by excess heat. Peak Inverse Voltage ratings of Silicon diodes are greater than Germanium diodes. Si is less expensive due to the greater abundance of element.
What is the conclusion of Zener diode?
Conclusion. The Zener diode, with its accurate and specific reverse breakdown voltage, allows for a simple, inexpensive voltage regulator. Combined with the right resistor, fine control over both the voltage and the supply current can be attained.
What happens if Zener diode is forward-biased?
The Zener diode operates just like the normal diode when in the forward-bias mode, and has a turn-on voltage of between 0.3 and 0.7 V. As the reverse voltage increases to the predetermined breakdown voltage (Vz), a current starts flowing through the diode.
Why do we use Zener diode?
The Zener voltage across a diode remains constant over a wide range of Zener current. A Zener diode permits Zener current, Iz, to flow when the voltage is above the specified Zener voltage. Thus, a Zener diode can be used for voltage detection by sensing Zener current with some other device.
What is the function of silicon diode?
Since a silicon diode only generally allows power to flow one way, it can be used to protect other devices in a circuit, such as transistors, from receiving too much power and burning out. In addition, specially configured silicon diodes, known as Zener diodes, can be used to maintain a fixed voltage.
Is silicon a diode?
A diode is an electrical switch commonly made of semiconductor material, such as silicon. It consists of two terminals: positive (anode) and negative (cathode). It is often used as a rectifier, which is a device that converts AC to DC with current flowing in one direction.
Why is Si preferred over germanium?
Why is silicon usually preferred to germanium in the manufacture of semiconductor devices? Silicon is abundant on the earth’s surface and therefore cheaper than germanium. The PIV (Peak Inverse Voltage) rating of silicon is much higher than germanium and therefore can withstand much higher temperatures than germanium.
How does Zener diode works?
A Zener diode is a silicon semiconductor device that permits current to flow in either a forward or reverse direction. The Zener diode has a well-defined reverse-breakdown voltage, at which it starts conducting current, and continues operating continuously in the reverse-bias mode without getting damaged.
What is application of Zener diode?
Zener diodes are used for voltage regulation, as reference elements, surge suppressors, and in switching applications and clipper circuits. The load voltage equals breakdown voltage VZ of the diode. The series resistor limits the current through the diode and drops the excess voltage when the diode is conducting.
What’s the difference between silicon and Ger Manium diodes?
Si diodes are preferred as rectifiers, whereas Ge diodes are preferred as lighting sensors. 08. The forward break over voltage is high for silicon diodes, whereas it’s low for Ger-manium diode. 09. Silicon diode looses about 0.7-0.9V, whereas Ger-manium diode looses about 0.3-0.4V.
What’s the difference between germanium and silicon transistor?
01. Silicon transistor has threshold voltage of 0.7V, whereas Germanium has 0.3V. 02. Si diode is having good temperature stability about 200° Celsius, whereas ge is having temperature stability about 85°c. 03. Leakage current of Sili_con diode is in nA, whereas the leakage current for germanium is in mA.
What are the results of germanium diode measurement?
The results of the measurement for germanium diode: Silicon Diode Germanium Diode Forward bias Reverse bias Forward bias Reverse bias BURNT BURNT 0 kOhm 1.76 kOhm Table 1.
What is the voltage of a silicon diode?
The results of this experiment appear to satisfy the theory behind diodes. The measured cut-in voltage for a Silicon diode was approximately 0.6 volts, and similarly for the Germanium diode 0.2 volts. These are both very close to the expected cut-in voltages.