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Drain Resistance of MESFET Formula

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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. Check FAQs

R d = (\frac{4 \cdot {f m}^{2}}{{f co}^{2}}) \cdot (R s + R g + R i)

R_d - Drain Resistance?f_m - Maximum Frequency of Oscillations?f_co - Cut-off Frequency?R_s - Source Resistance?R_g - Gate Metallization Resistance?R_i - Input Resistance?

Drain Resistance of MESFET Example

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Here is how the Drain Resistance of MESFET equation looks like with Values.

Here is how the Drain Resistance of MESFET equation looks like with Units.

Here is how the Drain Resistance of MESFET equation looks like.

450.104 = (\frac{4 \cdot 65^{2}}{{30.05}^{2}}) \cdot (5.75 + 2.8 + 15.5)

450.104Ω = (\frac{4 \cdot {65Hz}^{2}}{{30.05Hz}^{2}}) \cdot (5.75Ω + 2.8Ω + 15.5Ω)

450.104 = (\frac{4 \cdot 65^{2}}{{30.05}^{2}}) \cdot (5.75 + 2.8 + 15.5)

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Drain Resistance of MESFET Solution

Follow our step by step solution on how to calculate Drain Resistance of MESFET?

FIRST Step Consider the formula

R d = (\frac{4 \cdot {f m}^{2}}{{f co}^{2}}) \cdot (R s + R g + R i)

Next Step Substitute values of Variables

∴

R d = (\frac{4 \cdot {65Hz}^{2}}{{30.05Hz}^{2}}) \cdot (5.75Ω + 2.8Ω + 15.5Ω)

Next Step Prepare to Evaluate

∴

R d = (\frac{4 \cdot 65^{2}}{{30.05}^{2}}) \cdot (5.75 + 2.8 + 15.5)

Next Step Evaluate

∴

R d = 450.103958737656Ω

LAST Step Rounding Answer

∴

R d = 450.104Ω

Drain Resistance of MESFET Formula Elements

Variables

Drain 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.

Symbol: R_d

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Drain Resistance

Maximum Frequency of Oscillations

Maximum Frequency of Oscillations is defined as the practical upper bound for useful circuit operation with MESFET.

Symbol: f_m

Measurement: FrequencyUnit: Hz

Note: Value should be greater than 0.

Formulas to find Maximum Frequency of Oscillations

Cut-off Frequency

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.

Symbol: f_co

Measurement: FrequencyUnit: Hz

Note: Value should be greater than 0.

Formulas to find Cut-off Frequency

Source Resistance

Source Resistance is a measure of how much this source opposes the load from drawing current from it.

Symbol: R_s

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Source Resistance

Gate Metallization Resistance

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.

Symbol: R_g

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Gate Metallization Resistance

Input Resistance

Input Resistance is defined as the total internal resistance as experienced by MESFET.

Symbol: R_i

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Input Resistance

Other formulas in MESFET Characteristics category

Go Gate Length of MESFET

L gate = \frac{V s}{4 \cdot π \cdot f co}

Go Cut-off Frequency

f co = \frac{V s}{4 \cdot π \cdot L gate}

Go Transconductance in MESFET

g m = 2 \cdot C gs \cdot π \cdot f co

Go Gate Source Capacitance

C gs = \frac{g m}{2 \cdot π \cdot f co}

How to Evaluate Drain Resistance of MESFET?

Drain Resistance of MESFET evaluator uses Drain Resistance = ((4*Maximum Frequency of Oscillations^2)/Cut-off Frequency^2)*(Source Resistance+Gate Metallization Resistance+Input Resistance) to evaluate the Drain Resistance, The Drain Resistance of MESFET formula is defined as is the ratio of change in drain to source voltage to corresponding change in drain current for a constant gate to source voltage. Drain Resistance is denoted by R_d symbol.

How to evaluate Drain Resistance of MESFET using this online evaluator? To use this online evaluator for Drain Resistance of MESFET, enter Maximum Frequency of Oscillations (f_m), Cut-off Frequency (f_co), Source Resistance (R_s), Gate Metallization Resistance (R_g) & Input Resistance (R_i) and hit the calculate button.

FAQs on Drain Resistance of MESFET

What is the formula to find Drain Resistance of MESFET?

The formula of Drain Resistance of MESFET is expressed as Drain Resistance = ((4*Maximum Frequency of Oscillations^2)/Cut-off Frequency^2)*(Source Resistance+Gate Metallization Resistance+Input Resistance). Here is an example- 450.104 = ((4*65^2)/30.05^2)*(5.75+2.8+15.5).

How to calculate Drain Resistance of MESFET?

With Maximum Frequency of Oscillations (f_m), Cut-off Frequency (f_co), Source Resistance (R_s), Gate Metallization Resistance (R_g) & Input Resistance (R_i) we can find Drain Resistance of MESFET using the formula - Drain Resistance = ((4*Maximum Frequency of Oscillations^2)/Cut-off Frequency^2)*(Source Resistance+Gate Metallization Resistance+Input Resistance).

Can the Drain Resistance of MESFET be negative?

No, the Drain Resistance of MESFET, measured in Electric Resistance cannot be negative.

Which unit is used to measure Drain Resistance of MESFET?

Drain Resistance of MESFET is usually measured using the Ohm[Ω] for Electric Resistance. Megohm[Ω], Microhm[Ω], Volt per Ampere[Ω] are the few other units in which Drain Resistance of MESFET can be measured.

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Drain Resistance of MESFET Formula

Drain Resistance of MESFET Example

Drain Resistance of MESFET Solution

Drain Resistance of MESFET Formula Elements

Other formulas in MESFET Characteristics category

How to Evaluate Drain Resistance of MESFET?

FAQs on Drain Resistance of MESFET

Variable Name