Source Resistance Solution

STEP 0: Pre-Calculation Summary
Formula Used
Source Resistance = ((Drain Resistance*Cut-off Frequency^2)/(4*Maximum Frequency of Oscillations^2))-(Gate Metallization Resistance+Input Resistance)
Rs = ((Rd*fco^2)/(4*fm^2))-(Rg+Ri)
This formula uses 6 Variables
Variables Used
Source Resistance - (Measured in Ohm) - Source Resistance is a measure of how much this source opposes the load from drawing current from it.
Drain Resistance - (Measured in Ohm) - Drain Resistance is the ratio of change in drain to source voltage to corresponding change in drain current for a constant gate to source voltage.
Cut-off Frequency - (Measured in Hertz) - Cut-off Frequency is defined as corner frequency is a boundary in system's frequency response at which energy flowing through system begins to be reduced rather than passing through.
Maximum Frequency of Oscillations - (Measured in Hertz) - Maximum Frequency of Oscillations is defined as the practical upper bound for useful circuit operation with MESFET.
Gate Metallization Resistance - (Measured in Ohm) - Gate Metallization Resistance is defined as the resistance of metallization of a FET gate stripe that has effect of placing a non-linear resistance in series with the gate junction.
Input Resistance - (Measured in Ohm) - Input Resistance is defined as the total internal resistance as experienced by MESFET.
STEP 1: Convert Input(s) to Base Unit
Drain Resistance: 450 Ohm --> 450 Ohm No Conversion Required
Cut-off Frequency: 30.05 Hertz --> 30.05 Hertz No Conversion Required
Maximum Frequency of Oscillations: 65 Hertz --> 65 Hertz No Conversion Required
Gate Metallization Resistance: 2.8 Ohm --> 2.8 Ohm No Conversion Required
Input Resistance: 15.5 Ohm --> 15.5 Ohm No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Rs = ((Rd*fco^2)/(4*fm^2))-(Rg+Ri) --> ((450*30.05^2)/(4*65^2))-(2.8+15.5)
Evaluating ... ...
Rs = 5.74444526627219
STEP 3: Convert Result to Output's Unit
5.74444526627219 Ohm --> No Conversion Required
FINAL ANSWER
5.74444526627219 5.744445 Ohm <-- Source Resistance
(Calculation completed in 00.020 seconds)

Credits

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Created by Shobhit Dimri
Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat
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MESFET Characteristics Calculators

Gate Source Capacitance
​ LaTeX ​ Go Gate Source Capacitance = Transconductance/(2*pi*Cut-off Frequency)
Transconductance in MESFET
​ LaTeX ​ Go Transconductance = 2*Gate Source Capacitance*pi*Cut-off Frequency
Gate Length of MESFET
​ LaTeX ​ Go Gate Length = Saturated Drift Velocity/(4*pi*Cut-off Frequency)
Cut-off Frequency
​ LaTeX ​ Go Cut-off Frequency = Saturated Drift Velocity/(4*pi*Gate Length)

Source Resistance Formula

​LaTeX ​Go
Source Resistance = ((Drain Resistance*Cut-off Frequency^2)/(4*Maximum Frequency of Oscillations^2))-(Gate Metallization Resistance+Input Resistance)
Rs = ((Rd*fco^2)/(4*fm^2))-(Rg+Ri)

What is MESFET?

A MESFET (metal–semiconductor field-effect transistor) is a field-effect transistor semiconductor device similar to a JFET with a Schottky (metal–semiconductor) junction instead of a p–n junction for a gate.

How to Calculate Source Resistance?

Source Resistance calculator uses Source Resistance = ((Drain Resistance*Cut-off Frequency^2)/(4*Maximum Frequency of Oscillations^2))-(Gate Metallization Resistance+Input Resistance) to calculate the Source Resistance, The Source Resistance formula is defined as a purely resistive device can be experimentally determined by increasingly loading the device. Source Resistance is denoted by Rs symbol.

How to calculate Source Resistance using this online calculator? To use this online calculator for Source Resistance, enter Drain Resistance (Rd), Cut-off Frequency (fco), Maximum Frequency of Oscillations (fm), Gate Metallization Resistance (Rg) & Input Resistance (Ri) and hit the calculate button. Here is how the Source Resistance calculation can be explained with given input values -> 5.744445 = ((450*30.05^2)/(4*65^2))-(2.8+15.5).

FAQ

What is Source Resistance?
The Source Resistance formula is defined as a purely resistive device can be experimentally determined by increasingly loading the device and is represented as Rs = ((Rd*fco^2)/(4*fm^2))-(Rg+Ri) or Source Resistance = ((Drain Resistance*Cut-off Frequency^2)/(4*Maximum Frequency of Oscillations^2))-(Gate Metallization Resistance+Input Resistance). Drain Resistance is the ratio of change in drain to source voltage to corresponding change in drain current for a constant gate to source voltage, Cut-off Frequency is defined as corner frequency is a boundary in system's frequency response at which energy flowing through system begins to be reduced rather than passing through, Maximum Frequency of Oscillations is defined as the practical upper bound for useful circuit operation with MESFET, Gate Metallization Resistance is defined as the resistance of metallization of a FET gate stripe that has effect of placing a non-linear resistance in series with the gate junction & Input Resistance is defined as the total internal resistance as experienced by MESFET.
How to calculate Source Resistance?
The Source Resistance formula is defined as a purely resistive device can be experimentally determined by increasingly loading the device is calculated using Source Resistance = ((Drain Resistance*Cut-off Frequency^2)/(4*Maximum Frequency of Oscillations^2))-(Gate Metallization Resistance+Input Resistance). To calculate Source Resistance, you need Drain Resistance (Rd), Cut-off Frequency (fco), Maximum Frequency of Oscillations (fm), Gate Metallization Resistance (Rg) & Input Resistance (Ri). With our tool, you need to enter the respective value for Drain Resistance, Cut-off Frequency, Maximum Frequency of Oscillations, Gate Metallization Resistance & Input Resistance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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