Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
The FET stands for Field Effect Transistor. It is a three terminal semiconductor device in which current is controlled by an electric field.
with Solved Example Problems
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
(1) Fixed bias (or) base resistor method,(2) Collector to base bias,(3) Voltage divides bias (or) self bias
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
When an input AC signal only is applied to the circuit then input junction becomes forward biased results in current flows from emitter to base then base to collector circuit.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
Transistor used for any application, it is necessary to provide the sufficient voltage and current to switch ON and to operate in linear region of its transfer characteristics.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
Common Base of Input resistance is Low.Common Emitter of Input resistance is Low.Common Collector of Input resistance is High
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
collector terminal is common to both the input and output circuit.
with Solved Example Problems
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
A transistor, in a common-emitter configuration, has also two important characteristics namely input characteristics and output characteristics.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
In this configuration, emitter current (IE) is the input current and collector current (IC) is the output current.
three types
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
The BJT configured as three types.
with Solved Example Problems
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
The direction of a conventional current is always opposite to the electron current in any electronic device.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
The operation of a PNP transistor is similar to that of an NPN transistor.
Subject and UNIT: Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
The NPN transistor biased in active mode, that is the emitter-base of a transistor is forward-biased and collector-base junction is reverse biased