Maker Pro
Maker Pro

active & passive device

T

Te-Jung Lo

Jan 1, 1970
0
Why inductor, capacitor and resistor are called passive device, while
transistor, diode and FET are call active device!!

any response will be highly appreciated!
thanx!
 
G

Gym Bob

Jan 1, 1970
0
A diode is not an active device. It does not perform any active function.
 
D

Dave M.

Jan 1, 1970
0
Te-Jung Lo said:
Why inductor, capacitor and resistor are called passive device, while
transistor, diode and FET are call active device!!

..

Transistors and FET's require a source of energy for thier operation and
have outputs that are a function of input signals.

Resistors, capacitors, inductors and diodes are devices that do not require
a source of energy for thier operation.

Dave M.
 
R

Repeating Decimal

Jan 1, 1970
0
A diode is not an active device. It does not perform any active function.
The distinction between passive and active devices is not always that
simple.

Consider a tunnel diode or certain thermionic diodes. Under certain
conditions, they can be turned into oscillators. What about an SCR? Once
turned on it is about as active as any other switch. Even passive componets
such as resistors and inductor do their work only if supplied with power.

Bill
 
C

C What I Mean

Jan 1, 1970
0
When a diode is considered "inactive", does that make it a passive device?
If that were the case, would that not mean that every xsistor when turned
off becomes a passive device?

Passive devices are things such as coils, resistor, capacitors. I have never
personally heard of anyone calling a diode passive.
 
Top