To rectify AC to DC
Explication
A diode primarily functions as a rectifier, allowing current to flow in one direction (forward bias) and blocking it in the reverse direction, thus converting AC to DC in power supplies.
Diode
Explication
Diodes are designed to conduct current in forward bias and block in reverse bias, making them essential for rectification and voltage regulation.
Its current gain is represented by beta ($\beta$), typically between 100 and 300
Explication
A BJT's current gain, denoted by beta ($\beta$), is the ratio of collector current to base current and typically ranges from 100 to 300, making it a current-controlled device suitable for amplification.
Collector
Explication
The base terminal in a BJT controls the collector current, which is proportional to the base current, making it a current amplifier.
It stabilizes the gain and reduces distortion
Explication
Negative feedback stabilizes the amplifier's gain, extends bandwidth, and reduces distortion, leading to more reliable and linear operation.
78.5%
Explication
Class B amplifiers have a conduction angle that allows for about 78.5% efficiency, making them more efficient than Class A amplifiers.
Zener Diode
Explication
Zener diodes are used in voltage regulation by exploiting their breakdown voltage, maintaining a constant voltage across their terminals.
To determine the Q-point by intersecting load line with device characteristics
Explication
Load line analysis helps to find the Q-point by graphically intersecting the load line with the transistor's characteristic curves, indicating the steady-state operating point.
Transconductance model
Explication
The transconductance model is used for FETs in small-signal analysis, relating the drain current to the gate-source voltage, simplifying AC analysis.
Diodes convert AC to DC, Zener diodes are used for voltage regulation via breakdown voltage
Explication
Regular diodes conduct in forward bias for rectification, while Zener diodes operate in breakdown (reverse bias) to provide a stable reference voltage for regulation.
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Diode operation — bias?
Forward conducts, reverse blocks.
Diodes — function?
Allow current in forward bias, block in reverse bias.
BJT — current relationship?
Collector current $I_C = eta I_B$.
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