Input Impedance of Common-Base Amplifier Calculator

✖Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor.ⓘ Emitter Resistance [R_e]			+10% -10%
✖Small signal input resistance 2 between Base and emitter models how the input impedance between the base and emitter terminals of the transistor changes when a small AC signal is applied.ⓘ Small Signal Input Resistance [R_sm]			+10% -10%

✖Input Impedance is a measure of how much resistance an electronic device has to the flow of current in its input circuitry.ⓘ Input Impedance of Common-Base Amplifier [Z_in]

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Input Impedance of Common-Base Amplifier Solution

STEP 0: Pre-Calculation Summary

Formula Used

Input Impedance = (1/Emitter Resistance+1/Small Signal Input Resistance)^(-1)
Z_in = (1/R_e+1/R_sm)^(-1)
This formula uses 3 Variables

Variables Used

Input Impedance - (Measured in Ohm) - Input Impedance is a measure of how much resistance an electronic device has to the flow of current in its input circuitry.
Emitter Resistance - (Measured in Ohm) - Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor.
Small Signal Input Resistance - (Measured in Ohm) - Small signal input resistance 2 between Base and emitter models how the input impedance between the base and emitter terminals of the transistor changes when a small AC signal is applied.

STEP 1: Convert Input(s) to Base Unit

Emitter Resistance: 0.067 Kilohm --> 67 Ohm (Check conversion here)
Small Signal Input Resistance: 1.45 Kilohm --> 1450 Ohm (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Z_in = (1/R_e+1/R_sm)^(-1) --> (1/67+1/1450)^(-1)

Evaluating ... ...

Z_in = 64.0408701384311

STEP 3: Convert Result to Output's Unit

64.0408701384311 Ohm -->0.0640408701384311 Kilohm (Check conversion here)

FINAL ANSWER

0.0640408701384311 ≈ 0.064041 Kilohm <-- Input Impedance

(Calculation completed in 00.021 seconds)

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has created this Calculator and 600+ more calculators!

Verified by Urvi Rathod

Vishwakarma Government Engineering College (VGEC), Ahmedabad

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< Common Base Amplifier Calculators

Negative Voltage Gain from Base to Collector

LaTeX Go Negative Voltage Gain = -Common Base Current Gain*(Collector Resistance/Emitter Resistance)

Common Base Current Gain

LaTeX Go Common Base Current Gain = (Voltage Gain*Emitter Resistance/Collector Resistance)

Emitter Current of Common-Base Amplifier

LaTeX Go Emitter Current = Input Voltage/Emitter Resistance

Voltage Gain of Common-Base Amplifier

LaTeX Go Voltage Gain = Collector Voltage/Emitter Voltage

< CV Actions of Common Stage Amplifiers Calculators

Input Resistance of Common Emitter Amplifier

LaTeX Go Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/Small Signal Input Resistance)^-1

Input Impedance of Common-Base Amplifier

LaTeX Go Input Impedance = (1/Emitter Resistance+1/Small Signal Input Resistance)^(-1)

Fundamental Voltage in Common-Emitter Amplifier

LaTeX Go Fundamental Component Voltage = Input Resistance*Base Current

Emitter Current of Common-Base Amplifier

LaTeX Go Emitter Current = Input Voltage/Emitter Resistance

Input Impedance of Common-Base Amplifier Formula

LaTeX Go

Input Impedance = (1/Emitter Resistance+1/Small Signal Input Resistance)^(-1)
Z_in = (1/R_e+1/R_sm)^(-1)

What is the advantage of a common base amplifier?

The common base circuit works best as a current buffer. It can take an input current at a low input impedance, and deliver nearly that same current to a higher impedance output.

How to Calculate Input Impedance of Common-Base Amplifier?

Input Impedance of Common-Base Amplifier calculator uses Input Impedance = (1/Emitter Resistance+1/Small Signal Input Resistance)^(-1) to calculate the Input Impedance, Input Impedance of Common-Base Amplifier is a measure of how much resistance an electronic device has to the flow of current in its input circuitry. It is typically measured in ohms (Ω) and is important to ensure that the signal being input into a device is not degraded due to excessive resistance. Input Impedance is denoted by Z_in symbol.

How to calculate Input Impedance of Common-Base Amplifier using this online calculator? To use this online calculator for Input Impedance of Common-Base Amplifier, enter Emitter Resistance (R_e) & Small Signal Input Resistance (R_sm) and hit the calculate button. Here is how the Input Impedance of Common-Base Amplifier calculation can be explained with given input values -> 6.4E-5 = (1/67+1/1450)^(-1).

FAQ

What is Input Impedance of Common-Base Amplifier?

Input Impedance of Common-Base Amplifier is a measure of how much resistance an electronic device has to the flow of current in its input circuitry. It is typically measured in ohms (Ω) and is important to ensure that the signal being input into a device is not degraded due to excessive resistance and is represented as Z_in = (1/R_e+1/R_sm)^(-1) or Input Impedance = (1/Emitter Resistance+1/Small Signal Input Resistance)^(-1). Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor & Small signal input resistance 2 between Base and emitter models how the input impedance between the base and emitter terminals of the transistor changes when a small AC signal is applied.

How to calculate Input Impedance of Common-Base Amplifier?

Input Impedance of Common-Base Amplifier is a measure of how much resistance an electronic device has to the flow of current in its input circuitry. It is typically measured in ohms (Ω) and is important to ensure that the signal being input into a device is not degraded due to excessive resistance is calculated using Input Impedance = (1/Emitter Resistance+1/Small Signal Input Resistance)^(-1). To calculate Input Impedance of Common-Base Amplifier, you need Emitter Resistance (R_e) & Small Signal Input Resistance (R_sm). With our tool, you need to enter the respective value for Emitter Resistance & Small Signal Input Resistance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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