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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 the common emitter amplifier Solution

STEP 0: Pre-Calculation Summary
Formula Used
resistance_input = (1/Base resistance+1/Base resistance+1/Small-signal input resistance b/w base-emitter)
Ri = (1/RB1+1/RB2+1/rπ)
This formula uses 3 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)
Small-signal input resistance b/w base-emitter - Small-signal input resistance b/w base-emitter is the opposition offered to the current passing through the base-emitter region. (Measured in Ohm)
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
Small-signal input resistance b/w base-emitter: 20 Ohm --> 20 Ohm No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Ri = (1/RB1+1/RB2+1/rπ) --> (1/50+1/100+1/20)
Evaluating ... ...
Ri = 0.08
STEP 3: Convert Result to Output's Unit
0.08 Ohm --> No Conversion Required
0.08 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 the common emitter amplifier Formula

resistance_input = (1/Base resistance+1/Base resistance+1/Small-signal input resistance b/w base-emitter)
Ri = (1/RB1+1/RB2+1/rπ)

## 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 the common emitter amplifier?

Input resistance of the common emitter amplifier calculator uses resistance_input = (1/Base resistance+1/Base resistance+1/Small-signal input resistance b/w base-emitter) to calculate the Input resistance, The input resistance of the common emitter amplifier formula is defined as the opposition offered to the flow of current in the base region of the electrical circuit. Input resistance and is denoted by Ri symbol.

How to calculate Input resistance of the common emitter amplifier using this online calculator? To use this online calculator for Input resistance of the common emitter amplifier, enter Base resistance (RB1), Base resistance (RB2) and Small-signal input resistance b/w base-emitter (rπ) and hit the calculate button. Here is how the Input resistance of the common emitter amplifier calculation can be explained with given input values -> 0.08 = (1/50+1/100+1/20).

### FAQ

What is Input resistance of the common emitter amplifier?
The input resistance of the common emitter amplifier formula is defined as the opposition offered to the flow of current in the base region of the electrical circuit and is represented as Ri = (1/RB1+1/RB2+1/rπ) or resistance_input = (1/Base resistance+1/Base resistance+1/Small-signal input resistance b/w base-emitter). 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 and Small-signal input resistance b/w base-emitter is the opposition offered to the current passing through the base-emitter region.
How to calculate Input resistance of the common emitter amplifier?
The input resistance of the common emitter amplifier formula is defined as the opposition offered to the flow of current in the base region of the electrical circuit is calculated using resistance_input = (1/Base resistance+1/Base resistance+1/Small-signal input resistance b/w base-emitter). To calculate Input resistance of the common emitter amplifier, you need Base resistance (RB1), Base resistance (RB2) and Small-signal input resistance b/w base-emitter (rπ). With our tool, you need to enter the respective value for Base resistance, Base resistance and Small-signal input resistance b/w base-emitter 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 and Small-signal input resistance b/w base-emitter. 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 the common emitter amplifier calculator used?
Among many, Input resistance of the common emitter amplifier calculator is widely used in real life applications like {FormulaUses}. Here are few more real life examples -
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