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Why output current exist in common base configuration of a transistor even when no input is applied?
In a common base configuration of a transistor, output current exists even when no input is applied due to the transistor's inherent properties and biasing conditions. When the transistor is properly biased, a small base-emitter current flows, which allows for the flow of a larger collector current, resulting in an output current. Additionally, even in the absence of a direct input signal, thermal noise and leakage currents can contribute to a non-zero output current. Thus, the transistor can still conduct due to its internal characteristics and biasing.
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How does a transistor amplify in a common emitter configuration?
The base is excited by a very low current. That turns the transistor on so that a higher amount of current flow comes out.
Which transistor configuration has the lowest current gain?
The common-base configuration has the lowest current gain among the three basic transistor configurations (common-emitter, common-base, and common-collector). In this configuration, the current gain, often represented as α (alpha), is typically less than 1, as it is defined as the ratio of the output current to the input current. This results in lower overall amplification compared to the other configurations, where the common-emitter and common-collector setups provide higher current gains.
Why the output resistance of common emitter configuration is low in comparison to common base configuration to?
The output resistance of a common emitter configuration is low compared to that of a common base configuration primarily due to the transistor's internal characteristics and the way they are biased. In the common emitter configuration, the output is taken from the collector, which is affected by the load and the transistor's current gain (beta), leading to a lower output resistance. Conversely, in the common base configuration, the output is taken from the emitter, and the transistor provides a higher output resistance due to the lack of current amplification in that configuration. Thus, the common base setup exhibits greater output resistance because it does not allow for the same degree of voltage and current control as the common emitter does.
Which of the transistor configuration is prefer?
It depends on what you want to do with the transistor. Class A, common emitter, is used for voltage amplification. Class C, common collector, is used for current amplification. There are other classes and configurations but, again, it depends on what you want to do.
What are the three basic transistor connection configuration modes?
The three basic transistor connection configuration modes are common emitter, common base, and common collector. In the common emitter configuration, the emitter terminal is common to both the input and output circuits, providing high voltage gain. The common base configuration has the base terminal common to both circuits, offering high frequency response but low voltage gain. Finally, the common collector configuration, also known as an emitter follower, provides current gain and high input impedance while maintaining unity voltage gain.
What if base current is zero in a transistor used as an amplifier with common emitter configuration?
output current is zero
How does a transistor amplify in a common emitter configuration?
The base is excited by a very low current. That turns the transistor on so that a higher amount of current flow comes out.
Which transistor configuration has the lowest current gain?
The common-base configuration has the lowest current gain among the three basic transistor configurations (common-emitter, common-base, and common-collector). In this configuration, the current gain, often represented as α (alpha), is typically less than 1, as it is defined as the ratio of the output current to the input current. This results in lower overall amplification compared to the other configurations, where the common-emitter and common-collector setups provide higher current gains.
Why the output resistance of common emitter configuration is low in comparison to common base configuration to?
The output resistance of a common emitter configuration is low compared to that of a common base configuration primarily due to the transistor's internal characteristics and the way they are biased. In the common emitter configuration, the output is taken from the collector, which is affected by the load and the transistor's current gain (beta), leading to a lower output resistance. Conversely, in the common base configuration, the output is taken from the emitter, and the transistor provides a higher output resistance due to the lack of current amplification in that configuration. Thus, the common base setup exhibits greater output resistance because it does not allow for the same degree of voltage and current control as the common emitter does.
Why common emitter configuration is mostly used for transistor as switch?
because in ce configuration value of input voltage requried to make the transistor on is very less value of the output voltage or output current
What is common collector bipolar junction?
A circuit in which the input signal is applied to its base and the collector is earthed (grounded) is known as common collector configuration of BJT (BiPolar Junction Transistor)
Which of the transistor configuration is prefer?
It depends on what you want to do with the transistor. Class A, common emitter, is used for voltage amplification. Class C, common collector, is used for current amplification. There are other classes and configurations but, again, it depends on what you want to do.
Which transistor configuration has the highest input impedance?
Common Emitter Configuration has maximum impedance.
What is an explanation of different transistor configurations?
there are 3 types of configuratons......they are 1.common emmiter configuration 2.common collector configuration 3.common base configuration
What are the three basic transistor connection configuration modes?
The three basic transistor connection configuration modes are common emitter, common base, and common collector. In the common emitter configuration, the emitter terminal is common to both the input and output circuits, providing high voltage gain. The common base configuration has the base terminal common to both circuits, offering high frequency response but low voltage gain. Finally, the common collector configuration, also known as an emitter follower, provides current gain and high input impedance while maintaining unity voltage gain.
How a transistor transfers resistance?
The input current of transistor is approximately equal to output current .Suppose in common base configuration the emmiter current is approximately equal to collector current if neglect the very small value of bae current.Even though the input resistance is not equal to output resistance,the currents are same ,so we can reliase that the transistor transfers resistance to get same currents at both ends.
Discuss how bipolar junction transistor used as a voltage amplifier?
A bipolar junction transistor (BJT) can be used as a voltage amplifier by operating it in the active region, where it can increase the voltage of an input signal. In this configuration, a small input voltage applied between the base and emitter controls a larger current flowing from the collector to the emitter. The output voltage is taken across a load resistor connected to the collector, and the amplified output can be significantly higher than the input. The gain, or amplification factor, depends on the transistor's characteristics and the configuration of the circuit, such as common-emitter or common-collector arrangements.
