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Input Resistance of Common-Collector Amplifier 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{V fc}{i b}

R_in - Input Resistance?V_fc - Fundamental Component Voltage?i_b - Base Current?

Input Resistance of Common-Collector Amplifier Example

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Here is how the Input Resistance of Common-Collector Amplifier equation looks like with Values.

Here is how the Input Resistance of Common-Collector Amplifier equation looks like with Units.

Here is how the Input Resistance of Common-Collector Amplifier equation looks like.

0.3076 = \frac{5}{16.255}

0.3076kΩ = \frac{5V}{16.255mA}

0.3076 = \frac{5}{16.255}

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Input Resistance of Common-Collector Amplifier Solution

Follow our step by step solution on how to calculate Input Resistance of Common-Collector Amplifier?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

R in = \frac{5V}{16.255mA}

Next Step Convert Units

∴

R in = \frac{5V}{0.0163A}

Next Step Prepare to Evaluate

∴

R in = \frac{5}{0.0163}

Next Step Evaluate

∴

R in = 307.597662257767Ω

Next Step Convert to Output's Unit

∴

R in = 0.307597662257767kΩ

LAST Step Rounding Answer

∴

R in = 0.3076kΩ

Input Resistance of Common-Collector Amplifier 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

Fundamental Component Voltage

Fundamental component voltage is the first harmonic of the voltage in the harmonic analysis of the square wave of voltage in an inverter based circuit.

Symbol: V_fc

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Fundamental Component 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 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-Base Circuit

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

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 Transistor Amplifier Characteristics 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-Collector Amplifier?

Input Resistance of Common-Collector Amplifier evaluator uses Input Resistance = Fundamental Component Voltage/Base Current to evaluate the Input Resistance, The input resistance of common-collector amplifier formula is defined as resistance seen by current source or voltage source which drives circuit. Input Resistance is denoted by R_in symbol.

How to evaluate Input Resistance of Common-Collector Amplifier using this online evaluator? To use this online evaluator for Input Resistance of Common-Collector Amplifier, enter Fundamental Component Voltage (V_fc) & Base Current (i_b) and hit the calculate button.

FAQs on Input Resistance of Common-Collector Amplifier

What is the formula to find Input Resistance of Common-Collector Amplifier?

The formula of Input Resistance of Common-Collector Amplifier is expressed as Input Resistance = Fundamental Component Voltage/Base Current. Here is an example- 0.000308 = 5/0.016255.

How to calculate Input Resistance of Common-Collector Amplifier?

With Fundamental Component Voltage (V_fc) & Base Current (i_b) we can find Input Resistance of Common-Collector Amplifier using the formula - Input Resistance = Fundamental Component Voltage/Base Current.

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=(Emitter Resistance*(Finite Output Resistance+Load Resistance))/(Finite Output Resistance+(Load Resistance/(Collector Base Current Gain+1)))

Can the Input Resistance of Common-Collector Amplifier be negative?

No, the Input Resistance of Common-Collector Amplifier, measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Resistance of Common-Collector Amplifier?

Input Resistance of Common-Collector Amplifier 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-Collector Amplifier can be measured.

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Input Resistance of Common-Collector Amplifier Formula

​GoInput Resistance of Common Emitter Amplifier Formula

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

Input Resistance of Common-Collector Amplifier Example

Input Resistance of Common-Collector Amplifier Solution

Input Resistance of Common-Collector Amplifier Formula Elements

Other Formulas to find Input Resistance

Other formulas in Transistor Amplifier Characteristics category

How to Evaluate Input Resistance of Common-Collector Amplifier?

FAQs on Input Resistance of Common-Collector Amplifier

Variable Name

GoInput Resistance of Common Emitter Amplifier Formula

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