Hi guys,
I am trying to understant the meaning of quiescent state and equilibrium. When is a transistor is said to be in the quiescent state? How is the current in an unbiased p-n junction at equilibrium?
- posted
18 years ago
Basic Transistor
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- posted
18 years ago
In the quiescent state, there is no AC signal applied; however, DC bias current flows.
An equilibrium is reached when the PN junction is connected in series with a resistor across a regulated DC supply. The diode voltage drop cannot increase because that would require more current, and that would increase the voltage dropped by the resistor - which reduces the voltage across the diode! The system finds an equilibrium.