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Emitter Resistance given Threshold Voltage Formula

GoEmitter Resistance given Emitter Current Formula

GoEmitter Resistance of BJT Formula

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Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor. Check FAQs

R e = \frac{V th}{I e}

R_e - Emitter Resistance?V_th - Threshold Voltage?I_e - Emitter Current?

Emitter Resistance given Threshold Voltage Example

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Here is how the Emitter Resistance given Threshold Voltage equation looks like with Values.

Here is how the Emitter Resistance given Threshold Voltage equation looks like with Units.

Here is how the Emitter Resistance given Threshold Voltage equation looks like.

1.0833 = \frac{5.5}{5.077}

1.0833kΩ = \frac{5.5V}{5.077mA}

1.0833 = \frac{5.5}{5.077}

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Emitter Resistance given Threshold Voltage Solution

Follow our step by step solution on how to calculate Emitter Resistance given Threshold Voltage?

FIRST Step Consider the formula

R e = \frac{V th}{I e}

Next Step Substitute values of Variables

∴

R e = \frac{5.5V}{5.077mA}

Next Step Convert Units

∴

R e = \frac{5.5V}{0.0051A}

Next Step Prepare to Evaluate

∴

R e = \frac{5.5}{0.0051}

Next Step Evaluate

∴

R e = 1083.31691944061Ω

Next Step Convert to Output's Unit

∴

R e = 1.08331691944061kΩ

LAST Step Rounding Answer

∴

R e = 1.0833kΩ

Emitter Resistance given Threshold Voltage Formula Elements

Variables

Emitter Resistance

Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor.

Symbol: R_e

Measurement: Electric ResistanceUnit: kΩ

Note: Value can be positive or negative.

Formulas to find Emitter Resistance

Threshold Voltage

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.

Symbol: V_th

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Threshold Voltage

Emitter Current

Emitter Current is the amplified output current of a bipolar junction transistor.

Symbol: I_e

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Emitter Current

Other Formulas to find Emitter Resistance

Go Emitter Resistance given Emitter Current

R e = \frac{V th}{I e}

Go Emitter Resistance of BJT

R e = \frac{V ss}{i si}

Other formulas in Resistance category

Go Small-Signal Input Resistance between Base and Emitter

R s = \frac{V in}{I B}

Go Small-Signal Input Resistance between Base and Emitter using Transconductance

R s = \frac{β}{G m}

Go Small-Signal Input Resistance between Base and Emitter using Base Current

R s = \frac{V th}{I B}

Go Small-Signal Input Resistance given Emitter Current

V ss = i si \cdot R e

How to Evaluate Emitter Resistance given Threshold Voltage?

Emitter Resistance given Threshold Voltage evaluator uses Emitter Resistance = Threshold Voltage/Emitter Current to evaluate the Emitter Resistance, The Emitter Resistance given threshold voltage suggests that for a small signal, the transistor behaves as a voltage-controlled current source. The input port of the controlled current source is between base and emitter and the output port is in between collector and emitter. Emitter Resistance is denoted by R_e symbol.

How to evaluate Emitter Resistance given Threshold Voltage using this online evaluator? To use this online evaluator for Emitter Resistance given Threshold Voltage, enter Threshold Voltage (V_th) & Emitter Current (I_e) and hit the calculate button.

FAQs on Emitter Resistance given Threshold Voltage

What is the formula to find Emitter Resistance given Threshold Voltage?

The formula of Emitter Resistance given Threshold Voltage is expressed as Emitter Resistance = Threshold Voltage/Emitter Current. Here is an example- 0.001083 = 5.5/0.005077.

How to calculate Emitter Resistance given Threshold Voltage?

With Threshold Voltage (V_th) & Emitter Current (I_e) we can find Emitter Resistance given Threshold Voltage using the formula - Emitter Resistance = Threshold Voltage/Emitter Current.

What are the other ways to Calculate Emitter Resistance?

Here are the different ways to Calculate Emitter Resistance-

Emitter Resistance=Threshold Voltage/Emitter Current
Emitter Resistance=Small Signal/Signal Current

Can the Emitter Resistance given Threshold Voltage be negative?

Yes, the Emitter Resistance given Threshold Voltage, measured in Electric Resistance can be negative.

Which unit is used to measure Emitter Resistance given Threshold Voltage?

Emitter Resistance given Threshold Voltage is usually measured using the Kilohm[kΩ] for Electric Resistance. Ohm[kΩ], Megohm[kΩ], Microhm[kΩ] are the few other units in which Emitter Resistance given Threshold Voltage can be measured.

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