The common emitter amplifier circuit is one of the most widely used and basic types of amplifier circuits. It’s a simple circuit that allows for amplification of a signal, and it’s used in a variety of applications – from amplifying audio signals to powering electric motors.
But what makes the common emitter amplifier circuit so powerful? The answer lies in its formula – which is used to calculate the current gain, voltage gain, input resistance, and output resistance of the circuit. Understanding this formula can provide insight into how the circuit works, and can allow engineers to more accurately design their own circuits.
At the core of the common emitter amplifier circuit formula is a mathematical expression known as the “transistor current gain”. This expression is used to determine the current flowing through the transistor and is calculated by dividing the collector current (Ic) by the base current (Ib). It’s important to note that the transistor current gain is equal to the current gain of the circuit.
From there, the current gain of the circuit can be applied to the input and output resistances of the circuit to determine its overall voltage gain. This is calculated by multiplying the current gain by the ratio of the output resistance to the input resistance. Finally, the input resistance is determined by dividing the supply voltage by the current gain.
Overall, the common emitter amplifier circuit formula provides a great deal of insight into how the circuit works – allowing engineers to design their own circuits with greater accuracy. But understanding the formula is just the first step – it’s important for engineers to also understand how to apply the formula in the context of their own circuit designs.
By understanding the basics of the common emitter amplifier circuit formula, engineers can begin to unlock the potential of this powerful type of amplifier circuit and make their own contributions to the field of electrical engineering.
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