Section _ Understanding (Darlington transistor ) or Darlington pair

(Constant bias) mode in  Darlington transistor Darlington (Darlington pair) = (Darlington pair)

  Researcher  and author: Dr.   (   Afshin Rashid)

 

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 For a Darlington transistor to operate properly   , it is necessary to apply external voltages of the correct polarity to its emitter-base and collector-base junctions. This biasing   of the Darlington transistor is  called biasing  . In electronics,  biasing  is the adjustment of the initial operating conditions (current and voltage) of an active component in an amplifier. Many electronic components, such as diodes, transistors, and vacuum tubes, whose function is to process time-varying (AC) signals, also require a constant current or voltage (DC) at their terminals to operate properly. This current or voltage is called bias . The AC signal applied to them is superimposed on this DC bias current or voltage.




Applying a voltage with the same polarity causes current to flow through a PN junction, and if the polarity of the voltage is reversed, no current will flow through the circuit. To put it simply, the function of a   Darlington transistor (P-channel) can be thought of as amplifying current. Consider a small logic circuit that produces a very small current at its output under certain conditions. You can amplify this current with a  Darlington transistor (P-channel) and then use this strong current to turn an electric relay on and off.

There are also many cases where you use a   Darlington transistor  (P-channel)  to amplify voltage. Obviously, this feature is directly inherited from the current amplification feature of this device. It is enough to put the input current and the amplified output across a resistor to convert the low input voltage into the amplified output voltage.

  Researcher  and author: Dr.   (   Afshin Rashid)

Specialized PhD in Nano-Microelectronics