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If Beta is infinite, then the current gain will be unity.
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What if base current is zero in a transistor used as an amplifier with common emitter configuration?
output current is zero
Why output of common emitter amplifier is inverted?
In a common emitter amplifier, the base-emitter current causes a corresponding collector-emitter current, in the ratio of hFe (beta gain) or collector resistance over emitter resistance, which ever is less. Since this ratio is usually greater than one, the differential collector current is greater than the differential base current. This results in amplification of the base signal. As you increase the base-emitter current, the collector-emitter current also increases. This results in the collector being pulled towards the emitter, with the result that the differential collector voltage decreases. This results in inversion of the base signal.
Why there is 180 degrees phase shift in common emitter amplifier?
In the common emitter amplifier, an increase of base-emitter current causes a larger increase of collector emitter current. This means that, as the base voltage increases, the collector voltage decreases. This is a 180 degree phase shift.
Why does a CE amplifier have a high gain?
GAIN is a function of load current but basically a small current in the base will make a big change of collector current therefore making a transistor a voltage amplifier as opposed to a current amplifier
How does a transistor function as an amplifier?
A: The small base current will control the collector current flow by adding a resistor this changes of current flow will be evident as a voltage amplifier.
Why base in grounded in common emitter transistor as amplifier?
With a common emitter amplifier it's the emitter that is usually grounded.
What is a common base NPN amplifier?
A common base NPN amplifier is used for high frequency applications as the base minimize oscillations at high frequency, separates the input and output. In a common base NPN amplifier the voltage gain is high, relatively low input impedance and high output impedance compared to the common collector.
What is the output signal of a common base amplifier?
3Db
Main use of a Common base transistor amplifier is?
as voltage amplifiercurrent followeri am yoges
Why ce configuration amplifier is commonly used?
generally CE amplifier is considered as the most common amplifier because of two reasons :-1. it has a good current gain (almost >100) :- this is eslf -explainable as more the output more willingly it would be used as an amplifier2. low input current :- this is the most important reason , if we recall the input current in CE configuration we will come to know that it is the base current . base current has less magnitude this helps the designer to control it easily when compared to higher order magnitude currents like collector and emitter current as
What is the function of an emitter?
emitter collects output current produced in resister Wrong. An emitter in a semiconductor emits majority current carriers (electrons or holes) into the junction between it and the base..
Can you use CC configuration as an amplifier?
The Common Collector configuration amplifies current, by having the emitter voltage follow the base voltage, with an offset of the forward conduction voltage of about 0.7 volts, with a current gain of beta. (hFe)
