LT 3-5 Flashcards
What is the difference between a zener diode and a normal diode
A Zener diode is engineered to have a set break down voltage when hooked up reverse biased Whereas a normal diode would be destroyed once it hit it PIV
What is the material that zener diodes usually made of
Silicon
How can you tell a zener diode apart from a normal diode physically
you cant, only by looking up the code on the diode, other than that they look identical
How does a zener diode behave when hooked uo in forward bias
It acts like a normal diode and has a 0.7v drop across it
What is Zener Voltage
the constant voltage that a zener diode maintains over different currents when hooked up in reverse bias
When does a Zener diode regulate voltage
Only when its reverse biased and its input voltage is greater than it Zener voltage
What does LED stand for
Light Emitting Diode
How do Silicon and germanium Diode Release their extra energy
In the form of Heat
What are Led made of
gallium arsenide
Why is Gallium Arsenide used in LED’s
It releases extra energy in the form of light
What is the current range for LED’s
20-50 mA
What is the PIV for LED’s
6v
Different color LED’s have different ___________
Voltage drops
LED’s have (higher or Lower) voltage drops then a silicon diode
Higher
LED’s need to be (Forward or Reverse) Biased
Forward Biased