Drop high voltage to low voltage using  a silicon  rectifier diode

A diode is a semiconductor device that essentially acts as a one-way switch for current. It allows current to flow easily in one direction, but severely restricts current from flowing in the opposite direction.

 Drop high voltage to low voltage using  a  silicon rectifier diode

A rectifier diode is a two-lead semiconductor that allows current to pass in only one direction. Generally, P-N junction Diode is formed by joining together n-type and p-type semiconductor materials. The P-type side is called the anode and the n-type side is called the cathode.

PR1 = 12V 

Because each diode drop 0.7V So for 10 diode drop 10×0.7 = 7V

PR1 = 19V – 7V = 12V  

 Formular used  

Voltage dop =  Total number of diode connected in series x 0.7V

V(out) = V(in) – Voltage drop

Types of Diode

The types of diode include:

  1. Zener diode
  2. PN junction diode
  3. Tunnel diode
  4. Varactor diode
  5. Schottky diode
  6. Photodiode
  7. PIN diode
  8. Laser diode
  9. Avalanche diode
  10. Light emitting diode
 
What is a diode used for?

Main functions. The most common function of a diode is to allow an electric current to pass in one direction (called the diode’s forward direction), while blocking it in the opposite direction (the reverse direction). As such, the diode can be viewed as an electronic version of a check valve.

Which way do diodes go?

In a perfectly ideal diode, current flows in one direction only, from the anode (positive side) to the cathode (negative side) which is marked with the stripe. The schematic symbol is a triangle pointing towards a bar, where the current flows in the same direction, towards the barred (striped) end.

Are diodes AC or DC?

What Do Diodes Do in an Alternator? Diodes are used within the process of rectification, or changing an AC flow into DC. This is possible because diodes only allow current to flow in one direction. AC, or alternating current, includes current flowing both forward and backward, creating a full sine wave.

Frequently Asked Questions on p-n Junction

What happens when the battery voltage is increased in a forward-biased p-n junction?

The current through the junction increases when the battery voltage is increased in a forward-biased p-n junction. 

 
What happens when a p-n junction is reverse biased?

The holes and electrons tend to move away from the junction. 

 
What are the two breakdown mechanisms of the p-n junction?

The two breakdown mechanisms are Zener breakdown and Avalanche breakdown
 

 
What is static resistance of a diode?

Static resistance of a diode is defined as the ratio of the DC voltage applied across the diode to the DC current flowing through the diode.
 

 
What is the dynamic resistance of a diode?

Dynamic resistance of a diode is defined as the ratio of change in voltage to the change in current.
 

 
What is reverse resistance?

Reverse resistance is defined as the resistance offered by the p-n junction diode when it is reverse biased.

 

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