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Input Resistance of Transistor Amplifier Formula

GoInput Resistance of Emitter Follower 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 ip}{i in}

R_in - Input Resistance?V_ip - Amplifier Input?i_in - Input Current?

Input Resistance of Transistor Amplifier Example

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Here is how the Input Resistance of Transistor Amplifier equation looks like with Values.

Here is how the Input Resistance of Transistor Amplifier equation looks like with Units.

Here is how the Input Resistance of Transistor Amplifier equation looks like.

0.304 = \frac{0.152}{0.5}

0.304kΩ = \frac{0.152V}{0.5mA}

0.304 = \frac{0.152}{0.5}

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Input Resistance of Transistor Amplifier Solution

Follow our step by step solution on how to calculate Input Resistance of Transistor Amplifier?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

R in = \frac{0.152V}{0.5mA}

Next Step Convert Units

∴

R in = \frac{0.152V}{0.0005A}

Next Step Prepare to Evaluate

∴

R in = \frac{0.152}{0.0005}

Next Step Evaluate

∴

R in = 304Ω

LAST Step Convert to Output's Unit

∴

R in = 0.304kΩ

Input Resistance of Transistor 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

Amplifier Input

Amplifier input is a measure of how much an amplifier “amplifies” the input signal.

Symbol: V_ip

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Amplifier Input

Input Current

Input current is the current sent to the wire.

Symbol: i_in

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Input Current

Other Formulas to find Input Resistance

Go Input Resistance of Emitter Follower

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

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 Transistor Amplifier?

Input Resistance of Transistor Amplifier evaluator uses Input Resistance = Amplifier Input/Input Current to evaluate the Input Resistance, The Input Resistance of Transistor Amplifier formula refers to the measure of how much the amplifier circuit resists the flow of input current. Input Resistance is denoted by R_in symbol.

How to evaluate Input Resistance of Transistor Amplifier using this online evaluator? To use this online evaluator for Input Resistance of Transistor Amplifier, enter Amplifier Input (V_ip) & Input Current (i_in) and hit the calculate button.

FAQs on Input Resistance of Transistor Amplifier

What is the formula to find Input Resistance of Transistor Amplifier?

The formula of Input Resistance of Transistor Amplifier is expressed as Input Resistance = Amplifier Input/Input Current. Here is an example- 0.0117 = 0.152/0.0005.

How to calculate Input Resistance of Transistor Amplifier?

With Amplifier Input (V_ip) & Input Current (i_in) we can find Input Resistance of Transistor Amplifier using the formula - Input Resistance = Amplifier Input/Input Current.

What are the other ways to Calculate Input Resistance?

Here are the different ways to Calculate Input Resistance-

Input Resistance=1/(1/Signal Resistance in Base+1/Base Resistance)

Can the Input Resistance of Transistor Amplifier be negative?

No, the Input Resistance of Transistor Amplifier, measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Resistance of Transistor Amplifier?

Input Resistance of Transistor 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 Transistor Amplifier can be measured.

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Input Resistance of Transistor Amplifier Formula

​GoInput Resistance of Emitter Follower Formula

Input Resistance of Transistor Amplifier Example

Input Resistance of Transistor Amplifier Solution

Input Resistance of Transistor Amplifier Formula Elements

Other Formulas to find Input Resistance

Other formulas in Emitter Follower category

How to Evaluate Input Resistance of Transistor Amplifier?

FAQs on Input Resistance of Transistor Amplifier

Variable Name

GoInput Resistance of Emitter Follower Formula