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Input Resistance of Emitter Follower Formula

GoInput Resistance of Transistor Amplifier Formula

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Input resistance 2 is the opposition that an electrical component or circuit presents to the flow of electrical current when a voltage is applied to it. Check FAQs

R in = \frac{1}{\frac{1}{R sb} + \frac{1}{R b}}

R_in - Input Resistance?R_sb - Signal Resistance in Base?R_b - Base Resistance?

Input Resistance of Emitter Follower Example

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Here is how the Input Resistance of Emitter Follower equation looks like with Values.

Here is how the Input Resistance of Emitter Follower equation looks like with Units.

Here is how the Input Resistance of Emitter Follower equation looks like.

0.3064 = \frac{1}{\frac{1}{0.41} + \frac{1}{1.213}}

0.3064kΩ = \frac{1}{\frac{1}{0.41kΩ} + \frac{1}{1.213kΩ}}

0.3064 = \frac{1}{\frac{1}{0.41} + \frac{1}{1.213}}

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Input Resistance of Emitter Follower Solution

Follow our step by step solution on how to calculate Input Resistance of Emitter Follower?

FIRST Step Consider the formula

R in = \frac{1}{\frac{1}{R sb} + \frac{1}{R b}}

Next Step Substitute values of Variables

∴

R in = \frac{1}{\frac{1}{0.41kΩ} + \frac{1}{1.213kΩ}}

Next Step Convert Units

∴

R in = \frac{1}{\frac{1}{410Ω} + \frac{1}{1213Ω}}

Next Step Prepare to Evaluate

∴

R in = \frac{1}{\frac{1}{410} + \frac{1}{1213}}

Next Step Evaluate

∴

R in = 306.426370918053Ω

Next Step Convert to Output's Unit

∴

R in = 0.306426370918053kΩ

LAST Step Rounding Answer

∴

R in = 0.3064kΩ

Input Resistance of Emitter Follower Formula Elements

Variables

Input Resistance

Input resistance 2 is the opposition that an electrical component or circuit presents to the flow of electrical current when a voltage is applied to it.

Symbol: R_in

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Input Resistance

Signal Resistance in Base

Signal Resistance in base is the current flowing through the base at any moment.

Symbol: R_sb

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Signal Resistance in Base

Base Resistance

Base resistance is a measure of the opposition to current flow in an electrical circuit.

Symbol: R_b

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Base Resistance

Other Formulas to find Input Resistance

Go Input Resistance of Transistor Amplifier

R in = \frac{V ip}{i in}

Other formulas in Emitter Follower category

Go Drain Resistance of Cascode Amplifier

R d = (\frac{A vo}{{g mp}^{2} \cdot R out})

Go Equivalent Resistance of Cascode Amplifier

R dg = {(\frac{1}{R out1} + \frac{1}{R in})}^{- 1}

Go Open Circuit Bipolar Cascode Voltage Gain

A fo = - g mp \cdot (g ms \cdot R out) \cdot {(\frac{1}{R out1} + \frac{1}{R sm})}^{- 1}

Go Output voltage gain of MOS Cascode Amplifier

A vo = - {g mp}^{2} \cdot R out \cdot R d

How to Evaluate Input Resistance of Emitter Follower?

Input Resistance of Emitter Follower evaluator uses Input Resistance = 1/(1/Signal Resistance in Base+1/Base Resistance) to evaluate the Input Resistance, The input resistance of emitter follower formula is defined as opposition offered to flow of current in base region of electrical circuit. Input Resistance is denoted by R_in symbol.

How to evaluate Input Resistance of Emitter Follower using this online evaluator? To use this online evaluator for Input Resistance of Emitter Follower, enter Signal Resistance in Base (R_sb) & Base Resistance (R_b) and hit the calculate button.

FAQs on Input Resistance of Emitter Follower

What is the formula to find Input Resistance of Emitter Follower?

The formula of Input Resistance of Emitter Follower is expressed as Input Resistance = 1/(1/Signal Resistance in Base+1/Base Resistance). Here is an example- 0.000939 = 1/(1/410+1/1213).

How to calculate Input Resistance of Emitter Follower?

With Signal Resistance in Base (R_sb) & Base Resistance (R_b) we can find Input Resistance of Emitter Follower using the formula - Input Resistance = 1/(1/Signal Resistance in Base+1/Base Resistance).

What are the other ways to Calculate Input Resistance?

Here are the different ways to Calculate Input Resistance-

Input Resistance=Amplifier Input/Input Current

Can the Input Resistance of Emitter Follower be negative?

No, the Input Resistance of Emitter Follower, measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Resistance of Emitter Follower?

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

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Input Resistance of Emitter Follower Formula

​GoInput Resistance of Transistor Amplifier Formula

Input Resistance of Emitter Follower Example

Input Resistance of Emitter Follower Solution

Input Resistance of Emitter Follower Formula Elements

Other Formulas to find Input Resistance

Other formulas in Emitter Follower category

How to Evaluate Input Resistance of Emitter Follower?

FAQs on Input Resistance of Emitter Follower

Variable Name

GoInput Resistance of Transistor Amplifier Formula