Input Resistance of Mosfet Calculator

✖The Input Voltage is the voltage applied to the base terminal. It is the voltage difference between the base terminal and the emitter terminal of the transistor.ⓘ Input Voltage [V_i]			+10% -10%
✖The Collector Current s the current that flows through the collector terminal. It is the current that is controlled by the base current.ⓘ Collector Current [i_c]			+10% -10%
✖Small Signal Current Gain is a measure of how much the collector current changes in response to a small change in the base current .ⓘ Small Signal Current Gain [β₀]			+10% -10%

✖The Input Resistance is the resistance seen at the base terminal of the transistor.ⓘ Input Resistance of Mosfet [r_π]

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Formula

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Input Resistance of Mosfet

Formula

`"r"_{"π"} = "V"_{"i"}/("i"_{"c"}*"β"_{"0"})`

Example

`"0.236407Ω"="2.1V"/("1.89A"*"4.7")`

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Input Resistance of Mosfet Solution

STEP 0: Pre-Calculation Summary

Formula Used

Input Resistance = Input Voltage/(Collector Current*Small Signal Current Gain)
r_π = V_i/(i_c*β₀)
This formula uses 4 Variables

Variables Used

Input Resistance - (Measured in Ohm) - The Input Resistance is the resistance seen at the base terminal of the transistor.
Input Voltage - (Measured in Volt) - The Input Voltage is the voltage applied to the base terminal. It is the voltage difference between the base terminal and the emitter terminal of the transistor.
Collector Current - (Measured in Ampere) - The Collector Current s the current that flows through the collector terminal. It is the current that is controlled by the base current.
Small Signal Current Gain - Small Signal Current Gain is a measure of how much the collector current changes in response to a small change in the base current .

STEP 1: Convert Input(s) to Base Unit

Input Voltage: 2.1 Volt --> 2.1 Volt No Conversion Required
Collector Current: 1.89 Ampere --> 1.89 Ampere No Conversion Required
Small Signal Current Gain: 4.7 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

r_π = V_i/(i_c*β₀) --> 2.1/(1.89*4.7)

Evaluating ... ...

r_π = 0.236406619385343

STEP 3: Convert Result to Output's Unit

0.236406619385343 Ohm --> No Conversion Required

FINAL ANSWER

0.236406619385343 ≈ 0.236407 Ohm <-- Input Resistance

(Calculation completed in 00.020 seconds)

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Created by Suma Madhuri

VIT University (VIT), Chennai

Suma Madhuri has created this Calculator and 50+ more calculators!

Verified by Parminder Singh

Chandigarh University (CU), Punjab

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< 14 Resistance Calculators

MOSFET as Linear Resistance given Aspect Ratio

Go Linear Resistance = Channel Length/(Mobility of Electrons at Surface of Channel*Oxide Capacitance*Channel Width*Effective Voltage)

Output Resistance of Differential Amplifier

Go Output Resistance = ((Common Mode Input Signal*Transconductance)-Total Current)/(2*Transconductance*Total Current)

Input Resistance of Mosfet

Go Input Resistance = Input Voltage/(Collector Current*Small Signal Current Gain)

Finite Resistance between Drain and Source

Go Finite Resistance = modulus(Positive DC Voltage)/Drain Current

Output Resistance given Channel Length Modulation

Go Output Resistance = 1/(Channel Length Modulation*Drain Current)

Input Resistance given Transconductance

Go Input Resistance = Small Signal Current Gain/Transconductance

Electron Mean Free Path

Go Electron Mean Free Path = 1/(Output Resistance*Drain Current)

Drain Output Resistance

Go Output Resistance = 1/(Electron Mean Free Path*Drain Current)

Output Resistance given Transconductance

Go Output Resistance = 1/(Carrier Mobility*Transconductance)

Voltage Dependent Resistance in MOSFET

Go Finite Resistance = Effective Voltage/Drain Current

Output Resistance of Mosfet

Go Output Resistance = Early Voltage/Collector Current

Small Signal Input Resistance

Go Input Resistance = Input Voltage/Base Current

Conductance in Linear Resistance of MOSFET

Go Conductance of Channel = 1/Linear Resistance

MOSFET as Linear Resistance

Go Linear Resistance = 1/Conductance of Channel

Input Resistance of Mosfet Formula

Input Resistance = Input Voltage/(Collector Current*Small Signal Current Gain)
r_π = V_i/(i_c*β₀)

What are the applications of the input resistance of a MOSFET?

The high input resistance of MOSFETs makes them useful in a variety of applications, including:

Amplifiers: MOSFETs can be used to amplify very weak signals because their high input resistance means that they will not draw much current from the signal source, which will not attenuate the signal.
Switches: MOSFETs can be used as switches because their high input resistance means that they can be turned on and off with a very small amount of current.

How to Calculate Input Resistance of Mosfet?

Input Resistance of Mosfet calculator uses Input Resistance = Input Voltage/(Collector Current*Small Signal Current Gain) to calculate the Input Resistance, The Input Resistance of Mosfet formula is defined as the resistance seen at the gate terminal of the MOSFET. It is a measure of how much the gate current changes when the gate voltage is changed. Input Resistance is denoted by r_π symbol.

How to calculate Input Resistance of Mosfet using this online calculator? To use this online calculator for Input Resistance of Mosfet, enter Input Voltage (V_i), Collector Current (i_c) & Small Signal Current Gain (β₀) and hit the calculate button. Here is how the Input Resistance of Mosfet calculation can be explained with given input values -> 0.236407 = 2.1/(1.89*4.7).

FAQ

What is Input Resistance of Mosfet?

The Input Resistance of Mosfet formula is defined as the resistance seen at the gate terminal of the MOSFET. It is a measure of how much the gate current changes when the gate voltage is changed and is represented as r_π = V_i/(i_c*β₀) or Input Resistance = Input Voltage/(Collector Current*Small Signal Current Gain). The Input Voltage is the voltage applied to the base terminal. It is the voltage difference between the base terminal and the emitter terminal of the transistor, The Collector Current s the current that flows through the collector terminal. It is the current that is controlled by the base current & Small Signal Current Gain is a measure of how much the collector current changes in response to a small change in the base current .

How to calculate Input Resistance of Mosfet?

The Input Resistance of Mosfet formula is defined as the resistance seen at the gate terminal of the MOSFET. It is a measure of how much the gate current changes when the gate voltage is changed is calculated using Input Resistance = Input Voltage/(Collector Current*Small Signal Current Gain). To calculate Input Resistance of Mosfet, you need Input Voltage (V_i), Collector Current (i_c) & Small Signal Current Gain (β₀). With our tool, you need to enter the respective value for Input Voltage, Collector Current & Small Signal Current Gain and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Input Resistance?

In this formula, Input Resistance uses Input Voltage, Collector Current & Small Signal Current Gain. We can use 2 other way(s) to calculate the same, which is/are as follows -

Input Resistance = Input Voltage/Base Current
Input Resistance = Small Signal Current Gain/Transconductance

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