0
A transistor works as am amplifier by virtue of the fact that you can control the current in one path with a smaller current in another path.
In a typical class A (common emitter) configuration, a certain current from base to emitter will create a corresponding current from collector to emitter. Increasing or decreasing the base-emitter current will cause a corresponding increase or decrease in the collector-emitter current, by a ratio that is defined as hFe, or beta-gain.
Of course, this means that you have to properly bias the transistor, and understand the nature of hFe. You can operate a transistor in cutoff mode or saturated mode if you exceed the hFe limits. Within the limits, a properly biased transistor exhibits a (generally) linear operation.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Why the common mode signal should be rejected in differential amplifier?
because of the coupling between the two transister and absence of capacitance it can amplify both dc and ac
How does a transister work as an amplifier?
The name is your clue: a transistor and a resistor (the load) are put in series. The output signal is taken from the load resistor. A small input signal (to the third lead of the transistor) will cause the transistor to change resistance ... thus you can get a large output from a small input Amplification.
What does an amplifier do for a subwoofer?
An amplifier will power your subwoofer so they can work.
Why is a transistor a NOT gate?
A normal configuration for a BJT is Class A Common Emitter. In this configuration, the BJT operates as an inverting amplifier. Driven into saturation, it is a inverting switch, hence the designation NOT gate.Transistor can act as a gate. But its not a gate. In BJT(Bipolar Junction Transister) type transisters there are two P-N juntions. That means if we need we can use it as a NOT gate. Actually gate ICs (Intergrated circuits) are also build using transistors. (Example : TTL(transister-transister logic))
Howdoes transister work as aswitch?
vandels and carborators switch it really fast to make it go
Function of transister?
transister is the electronic divice used for correct current flow
Will an unpowered subwoofer work when plugged into an amplifier?
A passive sub-woofer does work when plugged in to an amplifier. In an active sub-woofer ("powered") the amplifier is built in.
How rotating magnetic amplifier work?
what does it mean by rotating amplifier and how it works?
A bipolar transister consists of emitter and what else?
Bipolar transister consist of emitter base & collecter
How do you reset an immobilized 2011 Outback?
heart is defined as the best transister. Transister is best current for loop
Why mostly a transister is used as amplifier than diode?
A diode is not an amplifier. It is a rectifier with asymmetrical voltage breakdown voltages. Usually the forward voltage is around 0.6V to 0.7V (silicon), and the reverse voltage is smaller than breakdown voltage, which is much higher. A transistor can be used as an amplifier, by taking into account the fact that the voltage breakdown curves vary, usually collector-emitter, as a function of some other current, usually base-emitter, but this depends on the class of the amplifier and whether or not the transistor is driven into saturation.
What is transister warking?
WHAT IS TRASISTER WORKING
