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Small-Signal Input Resistance between Base and Emitter Formula

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

GoSmall-Signal Input Resistance between Base and Emitter using Base Current 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 in}{I B}

R_s - Signal Resistance?V_in - Input Voltage?I_B - Base Current?

Small-Signal Input Resistance between Base and Emitter Example

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

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

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

32.4675 = \frac{2.5}{0.077}

32.4675kΩ = \frac{2.5V}{0.077mA}

32.4675 = \frac{2.5}{0.077}

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Small-Signal Input Resistance between Base and Emitter Solution

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

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

R s = \frac{2.5V}{0.077mA}

Next Step Convert Units

∴

R s = \frac{2.5V}{7.7E-5A}

Next Step Prepare to Evaluate

∴

R s = \frac{2.5}{7.7E-5}

Next Step Evaluate

∴

R s = 32467.5324675325Ω

Next Step Convert to Output's Unit

∴

R s = 32.4675324675325kΩ

LAST Step Rounding Answer

∴

R s = 32.4675kΩ

Small-Signal Input Resistance between Base and Emitter 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

Input Voltage

Input voltage is the voltage supplied to the device.

Symbol: V_in

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Input 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 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}

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?

Small-Signal Input Resistance between Base and Emitter evaluator uses Signal Resistance = Input Voltage/Base Current to evaluate the Signal Resistance, The Small-signal input resistance between base and emitter 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 this online evaluator? To use this online evaluator for Small-Signal Input Resistance between Base and Emitter, enter Input Voltage (V_in) & Base Current (I_B) and hit the calculate button.

FAQs on Small-Signal Input Resistance between Base and Emitter

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

The formula of Small-Signal Input Resistance between Base and Emitter is expressed as Signal Resistance = Input Voltage/Base Current. Here is an example- 0.032468 = 2.5/7.7E-05.

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

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

What are the other ways to Calculate Signal Resistance?

Here are the different ways to Calculate Signal Resistance-

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

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

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

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

Small-Signal Input Resistance between Base and Emitter 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 can be measured.

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