Mell What does current gain mean in transistors?
The current gain for the common-base configuration is defined as the change in collector current divided by the change in emitter current when the base-to-collector voltage is constant. Typical common-base current gain in a well-designed bipolar transistor is very close to unity.
What is the importance of voltage gain?
The Voltage Gain Because amplifiers have the ability to increase the magnitude of an input signal, it is useful to be able to rate an amplifier’s amplifying ability in terms of an output/input ratio. The technical term for an amplifier’s output/input magnitude ratio is gain.
What is the collector current of a transistor?
A collector current is referred to when identifying the output current from the transistor to the transistor’s collector terminal. This bias voltage is applied to the base current so a sufficient amount of base current flows to cause the transistor to produce sufficient collector currents.
Which configuration has highest current gain?
common emitter amplifier configuration
The common emitter amplifier configuration produces the highest current and power gain of all the three bipolar transistor configurations.
What is the current gain of a common emitter transistor?
The common emitter configuration has a current gain approximately equal to the β value of the transistor itself . However in the common collector configuration, the load resistance is connected in series with the emitter terminal so its current is equal to that of the emitter current.
How does current flow through Transistor?
Transistors can also work as switches. A tiny electric current flowing through one part of a transistor can make a much bigger current flow through another part of it. In other words, the small current switches on the larger one. This is essentially how all computer chips work.
Does voltage or current control a transistor?
A voltage or current applied to one pair of the transistor’s terminals controls the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal.
Is transistor can control high current with low current?
These pins are meant to send control signals, not to act as power supplies. The most common way to control another direct current device from a microcontroller is to use a transistor. Transistors allow you to control the flow of a high-current circuit from a low-current source.