Emitter Resistance given Emitter Current Solution

STEP 0: Pre-Calculation Summary
Formula Used
Emitter Resistance = Threshold Voltage/Emitter Current
Re = Vth/Ie
This formula uses 3 Variables
Variables Used
Emitter Resistance - (Measured in Ohm) - Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor.
Threshold Voltage - (Measured in Volt) - Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals.
Emitter Current - (Measured in Ampere) - Emitter Current is the amplified output current of a bipolar junction transistor.
STEP 1: Convert Input(s) to Base Unit
Threshold Voltage: 5.5 Volt --> 5.5 Volt No Conversion Required
Emitter Current: 5.077 Milliampere --> 0.005077 Ampere (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Re = Vth/Ie --> 5.5/0.005077
Evaluating ... ...
Re = 1083.31691944061
STEP 3: Convert Result to Output's Unit
1083.31691944061 Ohm -->1.08331691944061 Kilohm (Check conversion here)
FINAL ANSWER
1.08331691944061 1.083317 Kilohm <-- Emitter Resistance
(Calculation completed in 00.019 seconds)

Credits

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Birsa Institute of Technology (BIT), Sindri
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Jaipur Engineering College and Research Centre (JECRC), Jaipur
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Emitter Resistance given Emitter Current
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Small-Signal Input Resistance between Base and Emitter using Base Current
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Output Resistance of Current Source given Device Parameter
Go Output Resistance = Device Parameter/Drain Current
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Small-Signal Input Resistance given Emitter Current
Go Small Signal = Signal Current*Emitter Resistance
Emitter Resistance of BJT
Go Emitter Resistance = Small Signal/Signal Current
Input Resistance of BJT
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Small-Signal Input Resistance between Base and Emitter
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Emitter Resistance given Emitter Current Formula

Emitter Resistance = Threshold Voltage/Emitter Current
Re = Vth/Ie

Why do we use emitter resistors?

The aim of an AC signal amplifier circuit is to stabilize the DC biased input voltage to the amplifier and thus only amplify the required AC signal. This stabilization is achieved by the use of an Emitter Resistance which provides the required amount of automatic biasing needed for a common emitter amplifier.

How to Calculate Emitter Resistance given Emitter Current?

Emitter Resistance given Emitter Current calculator uses Emitter Resistance = Threshold Voltage/Emitter Current to calculate the Emitter Resistance, The Emitter resistance given emitter current is the resistance in the emitter circuit contained within the transistor package. Emitter Resistance is denoted by Re symbol.

How to calculate Emitter Resistance given Emitter Current using this online calculator? To use this online calculator for Emitter Resistance given Emitter Current, enter Threshold Voltage (Vth) & Emitter Current (Ie) and hit the calculate button. Here is how the Emitter Resistance given Emitter Current calculation can be explained with given input values -> 0.001083 = 5.5/0.005077.

FAQ

What is Emitter Resistance given Emitter Current?
The Emitter resistance given emitter current is the resistance in the emitter circuit contained within the transistor package and is represented as Re = Vth/Ie or Emitter Resistance = Threshold Voltage/Emitter Current. Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals & Emitter Current is the amplified output current of a bipolar junction transistor.
How to calculate Emitter Resistance given Emitter Current?
The Emitter resistance given emitter current is the resistance in the emitter circuit contained within the transistor package is calculated using Emitter Resistance = Threshold Voltage/Emitter Current. To calculate Emitter Resistance given Emitter Current, you need Threshold Voltage (Vth) & Emitter Current (Ie). With our tool, you need to enter the respective value for Threshold Voltage & Emitter Current 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 Emitter Resistance?
In this formula, Emitter Resistance uses Threshold Voltage & Emitter Current. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • Emitter Resistance = Threshold Voltage/Emitter Current
  • Emitter Resistance = Small Signal/Signal Current
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