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Drain Resistance of Cascode Amplifier 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{A vo}{{g mp}^{2} \cdot R out})

R_d - Drain Resistance?A_vo - Output Voltage Gain?g_mp - MOSFET Primary Transconductance?R_out - Finite Output Resistance?

Drain Resistance of Cascode Amplifier Example

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

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

Here is how the Drain Resistance of Cascode Amplifier equation looks like.

0.3605 = (\frac{49.31}{{19.77}^{2} \cdot 0.35})

0.3605kΩ = (\frac{49.31}{{19.77mS}^{2} \cdot 0.35kΩ})

0.3605 = (\frac{49.31}{{19.77}^{2} \cdot 0.35})

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Drain Resistance of Cascode Amplifier Solution

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

FIRST Step Consider the formula

R d = (\frac{A vo}{{g mp}^{2} \cdot R out})

Next Step Substitute values of Variables

∴

R d = (\frac{49.31}{{19.77mS}^{2} \cdot 0.35kΩ})

Next Step Convert Units

∴

R d = (\frac{49.31}{{0.0198S}^{2} \cdot 350Ω})

Next Step Prepare to Evaluate

∴

R d = (\frac{49.31}{{0.0198}^{2} \cdot 350})

Next Step Evaluate

∴

R d = 360.457129231264Ω

Next Step Convert to Output's Unit

∴

R d = 0.360457129231264kΩ

LAST Step Rounding Answer

∴

R d = 0.3605kΩ

Drain Resistance of Cascode Amplifier 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: kΩ

Note: Value should be greater than 0.

Formulas to find Drain Resistance

Output Voltage Gain

Output voltage gain is the difference between the output signal voltage level in decibels and the input signal voltage level in decibels.

Symbol: A_vo

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Output Voltage Gain

MOSFET Primary Transconductance

MOSFET Primary Transconductance is the change in the drain current divided by the small change in the gate/source voltage with a constant drain/source voltage.

Symbol: g_mp

Measurement: TransconductanceUnit: mS

Note: Value should be greater than 0.

Formulas to find MOSFET Primary Transconductance

Finite Output Resistance

The finite output resistance is a measure of how much the transistor's output impedance varies with changes in the output voltage.

Symbol: R_out

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Finite Output Resistance

Other formulas in Cascode Ampifier category

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

Go Negative Voltage Gain of Cascode Amplifier

A vn = - (g mp \cdot R dg)

How to Evaluate Drain Resistance of Cascode Amplifier?

Drain Resistance of Cascode Amplifier evaluator uses Drain Resistance = (Output Voltage Gain/(MOSFET Primary Transconductance^2*Finite Output Resistance)) to evaluate the Drain Resistance, The Drain Resistance of Cascode Amplifier is the resistance between the draining node and the source node. It is an important parameter in determining the performance of the amplifier, as it affects the input impedance and the output current. Drain Resistance is denoted by R_d symbol.

How to evaluate Drain Resistance of Cascode Amplifier using this online evaluator? To use this online evaluator for Drain Resistance of Cascode Amplifier, enter Output Voltage Gain (A_vo), MOSFET Primary Transconductance (g_mp) & Finite Output Resistance (R_out) and hit the calculate button.

FAQs on Drain Resistance of Cascode Amplifier

What is the formula to find Drain Resistance of Cascode Amplifier?

The formula of Drain Resistance of Cascode Amplifier is expressed as Drain Resistance = (Output Voltage Gain/(MOSFET Primary Transconductance^2*Finite Output Resistance)). Here is an example- 0.00036 = (49.31/(0.01977^2*350)).

How to calculate Drain Resistance of Cascode Amplifier?

With Output Voltage Gain (A_vo), MOSFET Primary Transconductance (g_mp) & Finite Output Resistance (R_out) we can find Drain Resistance of Cascode Amplifier using the formula - Drain Resistance = (Output Voltage Gain/(MOSFET Primary Transconductance^2*Finite Output Resistance)).

Can the Drain Resistance of Cascode Amplifier be negative?

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

Which unit is used to measure Drain Resistance of Cascode Amplifier?

Drain Resistance of Cascode Amplifier is usually measured using the Kilohm[kΩ] for Electric Resistance. Ohm[kΩ], Megohm[kΩ], Microhm[kΩ] are the few other units in which Drain Resistance of Cascode Amplifier can be measured.

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Drain Resistance of Cascode Amplifier Formula

Drain Resistance of Cascode Amplifier Example

Drain Resistance of Cascode Amplifier Solution

Drain Resistance of Cascode Amplifier Formula Elements

Other formulas in Cascode Ampifier category

How to Evaluate Drain Resistance of Cascode Amplifier?

FAQs on Drain Resistance of Cascode Amplifier

Variable Name