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Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance Formula

GoInput Resistance of Common Emitter Amplifier Formula

GoInput Resistance of Common-Base Circuit 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}{R b} + \frac{1}{R b2} + \frac{1}{R sm + (β + 1) \cdot R e})}^{- 1}

R_in - Input Resistance?R_b - Base Resistance?R_b2 - Base Resistance 2?R_sm - Small Signal Input Resistance?β - Collector Base Current Gain?R_e - Emitter Resistance?

Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance Example

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Here is how the Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance equation looks like with Values.

Here is how the Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance equation looks like with Units.

Here is how the Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance equation looks like.

0.3197 = {(\frac{1}{1.213} + \frac{1}{0.534} + \frac{1}{1.45 + (12 + 1) \cdot 0.067})}^{- 1}

0.3197kΩ = {(\frac{1}{1.213kΩ} + \frac{1}{0.534kΩ} + \frac{1}{1.45kΩ + (12 + 1) \cdot 0.067kΩ})}^{- 1}

0.3197 = {(\frac{1}{1.213} + \frac{1}{0.534} + \frac{1}{1.45 + (12 + 1) \cdot 0.067})}^{- 1}

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Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance Solution

Follow our step by step solution on how to calculate Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance?

FIRST Step Consider the formula

R in = {(\frac{1}{R b} + \frac{1}{R b2} + \frac{1}{R sm + (β + 1) \cdot R e})}^{- 1}

Next Step Substitute values of Variables

∴

R in = {(\frac{1}{1.213kΩ} + \frac{1}{0.534kΩ} + \frac{1}{1.45kΩ + (12 + 1) \cdot 0.067kΩ})}^{- 1}

Next Step Convert Units

∴

R in = {(\frac{1}{1213Ω} + \frac{1}{534Ω} + \frac{1}{1450Ω + (12 + 1) \cdot 67Ω})}^{- 1}

Next Step Prepare to Evaluate

∴

R in = {(\frac{1}{1213} + \frac{1}{534} + \frac{1}{1450 + (12 + 1) \cdot 67})}^{- 1}

Next Step Evaluate

∴

R in = 319.702267014196Ω

Next Step Convert to Output's Unit

∴

R in = 0.319702267014196kΩ

LAST Step Rounding Answer

∴

R in = 0.3197kΩ

Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance 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

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

Base Resistance 2

Base resistance 2 is a measure of the opposition to current flow in an electrical circuit.

Symbol: R_b2

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Base Resistance 2

Small Signal Input Resistance

Small signal input resistance 2 between Base and emitter models how the input impedance between the base and emitter terminals of the transistor changes when a small AC signal is applied.

Symbol: R_sm

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Small Signal Input Resistance

Collector Base Current Gain

Collector Base Current Gain is a term used in electronic circuits to describe the maximum current that a collector-emitter junction of a transistor can tolerate without breaking down.

Symbol: β

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Collector Base Current Gain

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 should be greater than 0.

Formulas to find Emitter Resistance

Other Formulas to find Input Resistance

Go Input Resistance of Common Emitter Amplifier

R in = {(\frac{1}{R b} + \frac{1}{R b2} + \frac{1}{R sm})}^{- 1}

Go Input Resistance of Common-Base Circuit

R in = \frac{R e \cdot (R out + R L)}{R out + (\frac{R L}{β + 1})}

Go Input Resistance of Common-Collector Amplifier

R in = \frac{V fc}{i b}

Go Input Resistance of Common-Emitter Amplifier given Emitter Resistance

R in = {(\frac{1}{R b} + \frac{1}{R b2} + \frac{1}{(R t + R e) \cdot (β + 1)})}^{- 1}

Other formulas in Common Emitter Amplifier category

Go Emitter Current of Common-Base Amplifier

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

Go Fundamental Voltage in Common-Emitter Amplifier

V fc = R in \cdot i b

Go Input Impedance of Common-Base Amplifier

Z in = {(\frac{1}{R e} + \frac{1}{R sm})}^{- 1}

Go Instantaneous Drain Current using Voltage between Drain and Source

i d = K n \cdot (V ox - V t) \cdot V gs

How to Evaluate Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance?

Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance evaluator uses Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/(Small Signal Input Resistance+(Collector Base Current Gain+1)*Emitter Resistance))^-1 to evaluate the Input Resistance, The Input resistance of common emitter amplifier given small-signal input resistance formula is defined as the opposition offered to the flow of the current of the electrical circuit. Input Resistance is denoted by R_in symbol.

How to evaluate Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance using this online evaluator? To use this online evaluator for Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance, enter Base Resistance (R_b), Base Resistance 2 (R_b2), Small Signal Input Resistance (R_sm), Collector Base Current Gain (β) & Emitter Resistance (R_e) and hit the calculate button.

FAQs on Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance

What is the formula to find Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance?

The formula of Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance is expressed as Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/(Small Signal Input Resistance+(Collector Base Current Gain+1)*Emitter Resistance))^-1. Here is an example- 0.00032 = (1/1213+1/534+1/(1450+(12+1)*67))^-1.

How to calculate Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance?

With Base Resistance (R_b), Base Resistance 2 (R_b2), Small Signal Input Resistance (R_sm), Collector Base Current Gain (β) & Emitter Resistance (R_e) we can find Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance using the formula - Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/(Small Signal Input Resistance+(Collector Base Current Gain+1)*Emitter Resistance))^-1.

What are the other ways to Calculate Input Resistance?

Here are the different ways to Calculate Input Resistance-

Input Resistance=(1/Base Resistance+1/Base Resistance 2+1/Small Signal Input Resistance)^-1
Input Resistance=(Emitter Resistance*(Finite Output Resistance+Load Resistance))/(Finite Output Resistance+(Load Resistance/(Collector Base Current Gain+1)))
Input Resistance=Fundamental Component Voltage/Base Current

Can the Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance be negative?

No, the Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance, measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance?

Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance 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 Common Emitter Amplifier given Small-Signal Input Resistance can be measured.

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Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance Formula

​GoInput Resistance of Common Emitter Amplifier Formula

​GoInput Resistance of Common-Base Circuit Formula

Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance Example

Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance Solution

Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance Formula Elements

Other Formulas to find Input Resistance

Other formulas in Common Emitter Amplifier category

How to Evaluate Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance?

FAQs on Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance

Variable Name

GoInput Resistance of Common Emitter Amplifier Formula

GoInput Resistance of Common-Base Circuit Formula