In a common emitter amplifier, using output resistance of 5000 Ωand input resistance of 2000 Ω,

step 1 For CE amplifier, I can write voltage gain. Voltage gain is equal to A is equal to B, R0 by RI.

In a common emitter amplifier, using output resistance of...

In a common emitter amplifier, using output resistance of $5000 \Omega$ and input resistance of $2000 \Omega$, if the peak value of input signal voltage is $10 \mathrm{mV}$ and $\beta=50$ then what is the peak value of output voltage? (A) $2.5 \times 10^{-4}$ Volt (B) $5 \times 10^{-6}$ Volt (C) $1.25$ Volt (D) 125 Volt

In a common emitter amplifier, using output resistance of $5000 \Omega$ and input resistance of $2000 \Omega$, if the peak value of input signal voltage is $10 \mathrm{mV}$ and $\beta=50$ then what is the peak value of output voltage?
(A) $2.5 \times 10^{-4}$ Volt
(B) $5 \times 10^{-6}$ Volt
(C) $1.25$ Volt
(D) 125 Volt

Key Concepts

Transistor Beta (?)

Beta (?) is a key parameter for bipolar junction transistors that represents the current gain, defined as the ratio of the collector current to the base current. In amplifier circuits, ? plays a crucial role in determining the overall gain and the degree to which the input signal is amplified.

Common Emitter Amplifier

A common emitter amplifier is a transistor configuration where the emitter terminal serves as a common point between the input and output. It is known for providing significant voltage gain and a phase inversion between the input and the output signals. This configuration is widely used in analog amplifier designs.

Voltage Gain Calculation

The voltage gain in a common emitter amplifier can often be approximated as the product of the transistor’s current gain (?) and the ratio of the output resistance to the input resistance, assuming the circuit conditions permit this simplification. This approach highlights how resistor values in the circuit and the transistor’s inherent properties influence the amplification of the input signal.

Input and Output Resistance Loading

The presence of input and output resistances in an amplifier circuit introduces loading effects that impact the overall voltage gain. The input resistance determines the fraction of the input signal that is effectively passed to the transistor, while the output resistance, along with subsequent load conditions, influences the voltage available at the output of the amplifier.

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