by injecting a small current into the base a larger proportional current will flow in the collector by adding a resistor into the path a big voltage drop will be evident therefore voltage amplification
A high signal input to a transistor amplifier gives a high signal output provided it stays linear.
The PNP transistors conducts when there is no signal at base (0V or grounded), when base current is increased the conduction of PNP transistor decreases.
hie is input impedance when signal applied at its base.
That depends on both the input signal and the type of amplifier the transistor is used in.
Transistor=Transfer+Resistor. When Transistor operates in active region its input resistance is high and output resistance is low. So,We can consider transistor as a device which transfers its resistance from high to low. And by this property transistor amplifies input signal.
Power transistor can conduct large amount of currents through it, more than small signal transistor. power transistor has a vertical structure and small signal transistor has horizontal structure.In power transistor quasi saturation region is present which is absent in the small signal transistor. In power transistor there is a inculsion of drift layer which is not there in the small signal transistor. Power dissipation is less in power transistor and it is more in small signal transistor. b.v.polytechnic,vasai pushkar vaity.
Yes, a transistor can amplifiy an a.c. signal.
Transistor increase the strength of a weak signal from the base
When the out from a transistor is the exact replic of the input signal then it is called unmodulated signal i e. there will not be any change in frequency voltage power etc
A high signal input to a transistor amplifier gives a high signal output provided it stays linear.
The work of a transistor is to amplify the input signal to get high output value.
Transistor is an active element because it can amplify the signal applied.
The PNP transistors conducts when there is no signal at base (0V or grounded), when base current is increased the conduction of PNP transistor decreases.
It depends on how you bias the transistor. If you ground the emitter, which is very common, you will need to offset the input signal so you can amplify the full voltage swing.
transistor
hie is input impedance when signal applied at its base.
That depends on both the input signal and the type of amplifier the transistor is used in.