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Common-Mode Input Signal of MOSFET Formula

GoCommon-Mode Signal of MOSFET given Resistance Formula

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A common mode input signal is a type of electrical signal that appears equally on both input terminals of a differential amplifier. Check FAQs

V cin = (\frac{I t}{g m}) + (2 \cdot I t \cdot R tl)

V_cin - Common Mode Input Signal?I_t - Total Current?g_m - Transconductance?R_tl - Total Load Resistance of MOSFET?

Common-Mode Input Signal of MOSFET Example

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Here is how the Common-Mode Input Signal of MOSFET equation looks like with Values.

Here is how the Common-Mode Input Signal of MOSFET equation looks like with Units.

Here is how the Common-Mode Input Signal of MOSFET equation looks like.

135.52 = (\frac{7.7}{0.5}) + (2 \cdot 7.7 \cdot 7.8)

135.52V = (\frac{7.7mA}{0.5mS}) + (2 \cdot 7.7mA \cdot 7.8kΩ)

135.52 = (\frac{7.7}{0.5}) + (2 \cdot 7.7 \cdot 7.8)

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Common-Mode Input Signal of MOSFET Solution

Follow our step by step solution on how to calculate Common-Mode Input Signal of MOSFET?

FIRST Step Consider the formula

V cin = (\frac{I t}{g m}) + (2 \cdot I t \cdot R tl)

Next Step Substitute values of Variables

∴

V cin = (\frac{7.7mA}{0.5mS}) + (2 \cdot 7.7mA \cdot 7.8kΩ)

Next Step Convert Units

∴

V cin = (\frac{0.0077A}{0.0005S}) + (2 \cdot 0.0077A \cdot 7800Ω)

Next Step Prepare to Evaluate

∴

V cin = (\frac{0.0077}{0.0005}) + (2 \cdot 0.0077 \cdot 7800)

LAST Step Evaluate

∴

V cin = 135.52V

Common-Mode Input Signal of MOSFET Formula Elements

Variables

Common Mode Input Signal

A common mode input signal is a type of electrical signal that appears equally on both input terminals of a differential amplifier.

Symbol: V_cin

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Common Mode Input Signal

Total Current

Total current is a term used in electrical engineering and physics to refer to the sum of all the electric currents flowing through a particular point in a circuit or conductor.

Symbol: I_t

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Total Current

Transconductance

Transconductance is defined as the ratio of the change in the output current to the change in the input voltage, with the gate-source voltage held constant.

Symbol: g_m

Measurement: Electric ConductanceUnit: mS

Note: Value can be positive or negative.

Formulas to find Transconductance

Total Load Resistance of MOSFET

Total load resistance of MOSFET includes both the intrinsic drain-source resistance of the MOSFET and the external load resistance that is connected to the drain terminal.

Symbol: R_tl

Measurement: Electric ResistanceUnit: kΩ

Note: Value can be positive or negative.

Formulas to find Total Load Resistance of MOSFET

Other Formulas to find Common Mode Input Signal

Go Common-Mode Signal of MOSFET given Resistance

V cin = \frac{2 \cdot R out \cdot V out}{R L}

Other formulas in Common Mode Rejection Ratio (CMRR) category

Go Common-Mode Rejection Ratio of MOSFET given Resistance

CMRR = \frac{2 \cdot g m \cdot R out}{\frac{ΔR D}{R d}}

Go Common-Mode Rejection Ratio of MOS with Current-Mirror Load

CMRR = g m \cdot (\frac{1}{\frac{1}{R' 1} + \frac{1}{R' 2}}) \cdot (2 \cdot Δg m \cdot R fo)

Go Common-Mode Rejection Ratio of MOS with Current-Mirror Load when Resistance at Drains are Equal

CMRR = (g m \cdot R fo) \cdot (g m \cdot R s)

Go Common-Mode Rejection Ratio of MOSFET in Decibels

CMRR db = mod \underset{̲}{u} s (20 \cdot \log 10 (\frac{A v}{A cm(db)}))

How to Evaluate Common-Mode Input Signal of MOSFET?

Common-Mode Input Signal of MOSFET evaluator uses Common Mode Input Signal = (Total Current/Transconductance)+(2*Total Current*Total Load Resistance of MOSFET) to evaluate the Common Mode Input Signal, The Common-mode input signal of MOSFET formula is defined as the average voltage which is applied to the two inputs of an amplifier. In the case of an op-amp, the two inputs are at the practically same potential, with only a small offset between them. So, effectively you can see the common-mode voltage on either input. Common Mode Input Signal is denoted by V_cin symbol.

How to evaluate Common-Mode Input Signal of MOSFET using this online evaluator? To use this online evaluator for Common-Mode Input Signal of MOSFET, enter Total Current (I_t), Transconductance (g_m) & Total Load Resistance of MOSFET (R_tl) and hit the calculate button.

FAQs on Common-Mode Input Signal of MOSFET

What is the formula to find Common-Mode Input Signal of MOSFET?

The formula of Common-Mode Input Signal of MOSFET is expressed as Common Mode Input Signal = (Total Current/Transconductance)+(2*Total Current*Total Load Resistance of MOSFET). Here is an example- 135.52 = (0.0077/0.0005)+(2*0.0077*7800).

How to calculate Common-Mode Input Signal of MOSFET?

With Total Current (I_t), Transconductance (g_m) & Total Load Resistance of MOSFET (R_tl) we can find Common-Mode Input Signal of MOSFET using the formula - Common Mode Input Signal = (Total Current/Transconductance)+(2*Total Current*Total Load Resistance of MOSFET).

What are the other ways to Calculate Common Mode Input Signal?

Here are the different ways to Calculate Common Mode Input Signal-

Common Mode Input Signal=(2*Output Resistance*Output Voltage)/Load Resistance

Can the Common-Mode Input Signal of MOSFET be negative?

Yes, the Common-Mode Input Signal of MOSFET, measured in Electric Potential can be negative.

Which unit is used to measure Common-Mode Input Signal of MOSFET?

Common-Mode Input Signal of MOSFET is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which Common-Mode Input Signal of MOSFET can be measured.

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Common-Mode Input Signal of MOSFET Formula

​GoCommon-Mode Signal of MOSFET given Resistance Formula

Common-Mode Input Signal of MOSFET Example

Common-Mode Input Signal of MOSFET Solution

Common-Mode Input Signal of MOSFET Formula Elements

Other Formulas to find Common Mode Input Signal

Other formulas in Common Mode Rejection Ratio (CMRR) category

How to Evaluate Common-Mode Input Signal of MOSFET?

FAQs on Common-Mode Input Signal of MOSFET

Variable Name

GoCommon-Mode Signal of MOSFET given Resistance Formula