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

GoSmall-Signal Input Resistance between Base and Emitter Formula

GoSmall-Signal Input Resistance between Base and Emitter using Transconductance Formula

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Signal Resistance is the resistance which is fed with the signal voltage source vs to an Amplifier. Check FAQs

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

R_s - Signal Resistance?V_th - Threshold Voltage?I_B - Base Current?

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

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Here is how the Small-Signal Input Resistance between Base and Emitter using Base Current equation looks like with Values.

Here is how the Small-Signal Input Resistance between Base and Emitter using Base Current equation looks like with Units.

Here is how the Small-Signal Input Resistance between Base and Emitter using Base Current equation looks like.

71.4286 = \frac{5.5}{0.077}

71.4286kΩ = \frac{5.5V}{0.077mA}

71.4286 = \frac{5.5}{0.077}

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

Follow our step by step solution on how to calculate Small-Signal Input Resistance between Base and Emitter using Base Current?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

R s = \frac{5.5V}{0.077mA}

Next Step Convert Units

∴

R s = \frac{5.5V}{7.7E-5A}

Next Step Prepare to Evaluate

∴

R s = \frac{5.5}{7.7E-5}

Next Step Evaluate

∴

R s = 71428.5714285714Ω

Next Step Convert to Output's Unit

∴

R s = 71.4285714285714kΩ

LAST Step Rounding Answer

∴

R s = 71.4286kΩ

Small-Signal Input Resistance between Base and Emitter using Base Current Formula Elements

Variables

Signal Resistance

Signal Resistance is the resistance which is fed with the signal voltage source vs to an Amplifier.

Symbol: R_s

Measurement: Electric ResistanceUnit: kΩ

Note: Value can be positive or negative.

Formulas to find Signal 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

Base Current

Base Current is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on.

Symbol: I_B

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Base Current

Other Formulas to find Signal Resistance

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}

Other formulas in Resistance category

Go Emitter Resistance given Threshold Voltage

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

Go Small-Signal Input Resistance given Emitter Current

V ss = i si \cdot R e

Go Emitter Resistance given Emitter Current

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

Go Output Resistance of Simple Current BJT

R o = \frac{V DD}{I o}

How to Evaluate Small-Signal Input Resistance between Base and Emitter using Base Current?

Small-Signal Input Resistance between Base and Emitter using Base Current evaluator uses Signal Resistance = Threshold Voltage/Base Current to evaluate the Signal Resistance, The Small-Signal Input Resistance between Base and Emitter using Base Current 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. Signal Resistance is denoted by R_s symbol.

How to evaluate Small-Signal Input Resistance between Base and Emitter using Base Current using this online evaluator? To use this online evaluator for Small-Signal Input Resistance between Base and Emitter using Base Current, enter Threshold Voltage (V_th) & Base Current (I_B) and hit the calculate button.

FAQs on Small-Signal Input Resistance between Base and Emitter using Base Current

What is the formula to find Small-Signal Input Resistance between Base and Emitter using Base Current?

The formula of Small-Signal Input Resistance between Base and Emitter using Base Current is expressed as Signal Resistance = Threshold Voltage/Base Current. Here is an example- 0.071429 = 5.5/7.7E-05.

How to calculate Small-Signal Input Resistance between Base and Emitter using Base Current?

With Threshold Voltage (V_th) & Base Current (I_B) we can find Small-Signal Input Resistance between Base and Emitter using Base Current using the formula - Signal Resistance = Threshold Voltage/Base Current.

What are the other ways to Calculate Signal Resistance?

Here are the different ways to Calculate Signal Resistance-

Signal Resistance=Input Voltage/Base Current
Signal Resistance=Common Emitter Current Gain/Transconductance

Can the Small-Signal Input Resistance between Base and Emitter using Base Current be negative?

Yes, the Small-Signal Input Resistance between Base and Emitter using Base Current, measured in Electric Resistance can be negative.

Which unit is used to measure Small-Signal Input Resistance between Base and Emitter using Base Current?

Small-Signal Input Resistance between Base and Emitter using Base Current is usually measured using the Kilohm[kΩ] for Electric Resistance. Ohm[kΩ], Megohm[kΩ], Microhm[kΩ] are the few other units in which Small-Signal Input Resistance between Base and Emitter using Base Current can be measured.

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