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Input Resistance of Common-Base Circuit Formula

GoInput Resistance of Common Emitter Amplifier Formula

GoInput Resistance of Common Emitter Amplifier given Small-Signal Input Resistance 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{R e \cdot (R out + R L)}{R out + (\frac{R L}{β + 1})}

R_in - Input Resistance?R_e - Emitter Resistance?R_out - Finite Output Resistance?R_L - Load Resistance?β - Collector Base Current Gain?

Input Resistance of Common-Base Circuit Example

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With units

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Here is how the Input Resistance of Common-Base Circuit equation looks like with Values.

Here is how the Input Resistance of Common-Base Circuit equation looks like with Units.

Here is how the Input Resistance of Common-Base Circuit equation looks like.

0.2134 = \frac{0.067 \cdot (0.35 + 1.013)}{0.35 + (\frac{1.013}{12 + 1})}

0.2134kΩ = \frac{0.067kΩ \cdot (0.35kΩ + 1.013kΩ)}{0.35kΩ + (\frac{1.013kΩ}{12 + 1})}

0.2134 = \frac{0.067 \cdot (0.35 + 1.013)}{0.35 + (\frac{1.013}{12 + 1})}

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Input Resistance of Common-Base Circuit Solution

Follow our step by step solution on how to calculate Input Resistance of Common-Base Circuit?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

R in = \frac{0.067kΩ \cdot (0.35kΩ + 1.013kΩ)}{0.35kΩ + (\frac{1.013kΩ}{12 + 1})}

Next Step Convert Units

∴

R in = \frac{67Ω \cdot (350Ω + 1013Ω)}{350Ω + (\frac{1013Ω}{12 + 1})}

Next Step Prepare to Evaluate

∴

R in = \frac{67 \cdot (350 + 1013)}{350 + (\frac{1013}{12 + 1})}

Next Step Evaluate

∴

R in = 213.405177062736Ω

Next Step Convert to Output's Unit

∴

R in = 0.213405177062736kΩ

LAST Step Rounding Answer

∴

R in = 0.2134kΩ

Input Resistance of Common-Base Circuit 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

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

Finite Output Resistance

The finite output resistance is a measure of how much the transistor's output impedance varies with changes in the output voltage.

Symbol: R_out

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Finite Output Resistance

Load Resistance

Load resistance is the resistance value of load given for the network.

Symbol: R_L

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Load 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

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 Emitter Amplifier given Small-Signal Input Resistance

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

Input Resistance of Common-Base Circuit evaluator uses Input Resistance = (Emitter Resistance*(Finite Output Resistance+Load Resistance))/(Finite Output Resistance+(Load Resistance/(Collector Base Current Gain+1))) to evaluate the Input Resistance, The input resistance of common-base circuit formula is defined as involves placing extra-high voltage across insulation barrier of device for one minute. Input Resistance is denoted by R_in symbol.

How to evaluate Input Resistance of Common-Base Circuit using this online evaluator? To use this online evaluator for Input Resistance of Common-Base Circuit, enter Emitter Resistance (R_e), Finite Output Resistance (R_out), Load Resistance (R_L) & Collector Base Current Gain (β) and hit the calculate button.

FAQs on Input Resistance of Common-Base Circuit

What is the formula to find Input Resistance of Common-Base Circuit?

The formula of Input Resistance of Common-Base Circuit is expressed as Input Resistance = (Emitter Resistance*(Finite Output Resistance+Load Resistance))/(Finite Output Resistance+(Load Resistance/(Collector Base Current Gain+1))). Here is an example- 0.000213 = (67*(350+1013))/(350+(1013/(12+1))).

How to calculate Input Resistance of Common-Base Circuit?

With Emitter Resistance (R_e), Finite Output Resistance (R_out), Load Resistance (R_L) & Collector Base Current Gain (β) we can find Input Resistance of Common-Base Circuit using the formula - Input Resistance = (Emitter Resistance*(Finite Output Resistance+Load Resistance))/(Finite Output Resistance+(Load Resistance/(Collector Base Current Gain+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=(1/Base Resistance+1/Base Resistance 2+1/(Small Signal Input Resistance+(Collector Base Current Gain+1)*Emitter Resistance))^-1
Input Resistance=Fundamental Component Voltage/Base Current

Can the Input Resistance of Common-Base Circuit be negative?

No, the Input Resistance of Common-Base Circuit, measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Resistance of Common-Base Circuit?

Input Resistance of Common-Base Circuit 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-Base Circuit can be measured.

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Input Resistance of Common-Base Circuit Formula

​GoInput Resistance of Common Emitter Amplifier Formula

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

Input Resistance of Common-Base Circuit Example

Input Resistance of Common-Base Circuit Solution

Input Resistance of Common-Base Circuit Formula Elements

Other Formulas to find Input Resistance

Other formulas in Common Base Amplifier category

How to Evaluate Input Resistance of Common-Base Circuit?

FAQs on Input Resistance of Common-Base Circuit

Variable Name

GoInput Resistance of Common Emitter Amplifier Formula

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