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## Credits

Birsa Institute of Technology (BIT), Sindri
Payal Priya has created this Calculator and 500+ more calculators!
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## Input resistance of common-emitter amplifier in terms of emitter resistance Solution

STEP 0: Pre-Calculation Summary
Formula Used
resistance_input = (1/Base resistance+1/Base resistance+1/((Total resistance in the emitter+Emitter Resistance)*(Common emitter current gain+1)))
Ri = (1/RB1+1/RB2+1/((R+re)*(β+1)))
This formula uses 5 Variables
Variables Used
Base resistance - Base resistance is a measure of the opposition to current flow in an electrical circuit. (Measured in Ohm)
Base resistance - Base resistance is a measure of the opposition to current flow in an electrical circuit. (Measured in Ohm)
Total resistance in the emitter - The total resistance in the emitter is the total opposition caused in the flow of current in the emitter (Measured in Ohm)
Emitter Resistance - Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor. (Measured in Ohm)
Common emitter current gain- Common emitter current gain is highly influenced by two factors: the width of the base region, W, and the relative dopings of the base region and the emitter region.
STEP 1: Convert Input(s) to Base Unit
Base resistance: 50 Ohm --> 50 Ohm No Conversion Required
Base resistance: 100 Ohm --> 100 Ohm No Conversion Required
Total resistance in the emitter: 40 Ohm --> 40 Ohm No Conversion Required
Emitter Resistance: 50 Ohm --> 50 Ohm No Conversion Required
Common emitter current gain: 55 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Ri = (1/RB1+1/RB2+1/((R+re)*(β+1))) --> (1/50+1/100+1/((40+50)*(55+1)))
Evaluating ... ...
Ri = 0.0301984126984127
STEP 3: Convert Result to Output's Unit
0.0301984126984127 Ohm --> No Conversion Required
0.0301984126984127 Ohm <-- Input resistance
(Calculation completed in 00.016 seconds)

## < 6 Common-emitter amplifier Calculators

Overall voltage gain of the common-emitter amplifier
overall_voltage_gain = -(Input resistance/Input resistance+Signal Resistance)*MOSFET Transconductance*(1/Total resistance in collector+1/Load resistance+1/Output resistance) Go
Overall voltage gain of common-emitter amplifier in terms of emitter resistance
overall_voltage_gain = -(Input resistance/(Input resistance+Signal Resistance))*Common-base current gain.*(Total resistance in collector/Total resistance in the emitter) Go
Input resistance of common emitter amplifier in terms of small-signal input resistance
resistance_input = (1/Base resistance+1/Base resistance+1/(Small-signal input resistance b/w base-emitter+(Common emitter current gain+1)*Total resistance in the emitter)) Go
Input resistance of common-emitter amplifier in terms of emitter resistance
resistance_input = (1/Base resistance+1/Base resistance+1/((Total resistance in the emitter+Emitter Resistance)*(Common emitter current gain+1))) Go
Input resistance of the common emitter amplifier
resistance_input = (1/Base resistance+1/Base resistance+1/Small-signal input resistance b/w base-emitter) Go
Output resistance of the common-emitter amplifier
resistance_output = 1*Output resistance of transistor Go

### Input resistance of common-emitter amplifier in terms of emitter resistance Formula

resistance_input = (1/Base resistance+1/Base resistance+1/((Total resistance in the emitter+Emitter Resistance)*(Common emitter current gain+1)))
Ri = (1/RB1+1/RB2+1/((R+re)*(β+1)))

## What does a common emitter amplifier do?

The common emitter amplifier configuration provides voltage gain and is one of the most widely used transistor configurations for electronic circuit design. The common emitter transistor amplifier circuit is one of the mainstay circuits for use within electronic circuit design offers many advantages.

## How to Calculate Input resistance of common-emitter amplifier in terms of emitter resistance?

Input resistance of common-emitter amplifier in terms of emitter resistance calculator uses resistance_input = (1/Base resistance+1/Base resistance+1/((Total resistance in the emitter+Emitter Resistance)*(Common emitter current gain+1))) to calculate the Input resistance, The Input resistance of common-emitter amplifier in terms of emitter resistance formula is defined as the opposition offered to the flow of the current of the electrical circuit. Input resistance and is denoted by Ri symbol.

How to calculate Input resistance of common-emitter amplifier in terms of emitter resistance using this online calculator? To use this online calculator for Input resistance of common-emitter amplifier in terms of emitter resistance, enter Base resistance (RB1), Base resistance (RB2), Total resistance in the emitter (R), Emitter Resistance (re) and Common emitter current gain (β) and hit the calculate button. Here is how the Input resistance of common-emitter amplifier in terms of emitter resistance calculation can be explained with given input values -> 0.030198 = (1/50+1/100+1/((40+50)*(55+1))).

### FAQ

What is Input resistance of common-emitter amplifier in terms of emitter resistance?
The Input resistance of common-emitter amplifier in terms of emitter resistance formula is defined as the opposition offered to the flow of the current of the electrical circuit and is represented as Ri = (1/RB1+1/RB2+1/((R+re)*(β+1))) or resistance_input = (1/Base resistance+1/Base resistance+1/((Total resistance in the emitter+Emitter Resistance)*(Common emitter current gain+1))). Base resistance is a measure of the opposition to current flow in an electrical circuit, Base resistance is a measure of the opposition to current flow in an electrical circuit, The total resistance in the emitter is the total opposition caused in the flow of current in the emitter, Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor and Common emitter current gain is highly influenced by two factors: the width of the base region, W, and the relative dopings of the base region and the emitter region.
How to calculate Input resistance of common-emitter amplifier in terms of emitter resistance?
The Input resistance of common-emitter amplifier in terms of emitter resistance formula is defined as the opposition offered to the flow of the current of the electrical circuit is calculated using resistance_input = (1/Base resistance+1/Base resistance+1/((Total resistance in the emitter+Emitter Resistance)*(Common emitter current gain+1))). To calculate Input resistance of common-emitter amplifier in terms of emitter resistance, you need Base resistance (RB1), Base resistance (RB2), Total resistance in the emitter (R), Emitter Resistance (re) and Common emitter current gain (β). With our tool, you need to enter the respective value for Base resistance, Base resistance, Total resistance in the emitter, Emitter Resistance and Common emitter current gain and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Input resistance?
In this formula, Input resistance uses Base resistance, Base resistance, Total resistance in the emitter, Emitter Resistance and Common emitter current gain. We can use 6 other way(s) to calculate the same, which is/are as follows -
• resistance_input = (1/Base resistance+1/Base resistance+1/Small-signal input resistance b/w base-emitter)
• overall_voltage_gain = -(Input resistance/Input resistance+Signal Resistance)*MOSFET Transconductance*(1/Total resistance in collector+1/Load resistance+1/Output resistance)
• resistance_input = (1/Base resistance+1/Base resistance+1/((Total resistance in the emitter+Emitter Resistance)*(Common emitter current gain+1)))
• resistance_input = (1/Base resistance+1/Base resistance+1/(Small-signal input resistance b/w base-emitter+(Common emitter current gain+1)*Total resistance in the emitter))
• overall_voltage_gain = -(Input resistance/(Input resistance+Signal Resistance))*Common-base current gain.*(Total resistance in collector/Total resistance in the emitter)
• resistance_output = 1*Output resistance of transistor
Where is the Input resistance of common-emitter amplifier in terms of emitter resistance calculator used?
Among many, Input resistance of common-emitter amplifier in terms of emitter resistance calculator is widely used in real life applications like {FormulaUses}. Here are few more real life examples -
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