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Common-Mode Rejection Ratio of MOS Controlled Source Transistor Formula

GoCommon-Mode Rejection Ratio of MOSFET in Decibels Formula

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Common Mode Rejection Ratio in DB is a measure of the ability of an electronic circuit to reject common-mode signals, which are signals that appear on both input terminals of the circuit. Check FAQs

CMRR db = \frac{mod \underset{̲}{u} s (A d)}{mod \underset{̲}{u} s (A cm(db))}

CMRR_db - Common Mode Rejection Ratio in DB?A_d - Differential Gain DB?A_cm(db) - Common Mode Gain DB?

Common-Mode Rejection Ratio of MOS Controlled Source Transistor Example

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Here is how the Common-Mode Rejection Ratio of MOS Controlled Source Transistor equation looks like with Values.

Here is how the Common-Mode Rejection Ratio of MOS Controlled Source Transistor equation looks like with Units.

Here is how the Common-Mode Rejection Ratio of MOS Controlled Source Transistor equation looks like.

18.913 = \frac{mod \underset{̲}{u} s (4.35)}{mod \underset{̲}{u} s (0.23)}

18.913dB = \frac{mod \underset{̲}{u} s (4.35dB)}{mod \underset{̲}{u} s (0.23dB)}

18.913 = \frac{mod \underset{̲}{u} s (4.35)}{mod \underset{̲}{u} s (0.23)}

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Common-Mode Rejection Ratio of MOS Controlled Source Transistor Solution

Follow our step by step solution on how to calculate Common-Mode Rejection Ratio of MOS Controlled Source Transistor?

FIRST Step Consider the formula

CMRR db = \frac{mod \underset{̲}{u} s (A d)}{mod \underset{̲}{u} s (A cm(db))}

Next Step Substitute values of Variables

∴

CMRR db = \frac{mod \underset{̲}{u} s (4.35dB)}{mod \underset{̲}{u} s (0.23dB)}

Next Step Prepare to Evaluate

∴

CMRR db = \frac{mod \underset{̲}{u} s (4.35)}{mod \underset{̲}{u} s (0.23)}

Next Step Evaluate

∴

CMRR db = 18.9130434782609dB

LAST Step Rounding Answer

∴

CMRR db = 18.913dB

Common-Mode Rejection Ratio of MOS Controlled Source Transistor Formula Elements

Variables

Functions

Common Mode Rejection Ratio in DB

Common Mode Rejection Ratio in DB is a measure of the ability of an electronic circuit to reject common-mode signals, which are signals that appear on both input terminals of the circuit.

Symbol: CMRR_db

Measurement: NoiseUnit: dB

Note: Value can be positive or negative.

Formulas to find Common Mode Rejection Ratio in DB

Differential Gain DB

Differential gain db is a measure of the amplification of a circuit for differential signals, which are signals that appear on the two input terminals with opposite polarities.

Symbol: A_d

Measurement: SoundUnit: dB

Note: Value can be positive or negative.

Formulas to find Differential Gain DB

Common Mode Gain DB

Common mode gain dB refers to the degree to which an amplifier or electronic circuit amplifies a signal that is common to both the input and output terminals of the circuit.

Symbol: A_cm(db)

Measurement: NoiseUnit: dB

Note: Value can be positive or negative.

Formulas to find Common Mode Gain DB

modulus

Modulus of a number is the remainder when that number is divided by another number.

Syntax: modulus

Other Formulas to find Common Mode Rejection Ratio in DB

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)}))

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 Signal of MOSFET given Resistance

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

How to Evaluate Common-Mode Rejection Ratio of MOS Controlled Source Transistor?

Common-Mode Rejection Ratio of MOS Controlled Source Transistor evaluator uses Common Mode Rejection Ratio in DB = (modulus(Differential Gain DB))/(modulus(Common Mode Gain DB)) to evaluate the Common Mode Rejection Ratio in DB, Common-mode rejection ratio of MOS controlled source transistor formula is defined as metric used to quantify ability of device to reject common-mode signals, i.e. those that appear simultaneously and in phase on both inputs. Common Mode Rejection Ratio in DB is denoted by CMRR_db symbol.

How to evaluate Common-Mode Rejection Ratio of MOS Controlled Source Transistor using this online evaluator? To use this online evaluator for Common-Mode Rejection Ratio of MOS Controlled Source Transistor, enter Differential Gain DB (A_d) & Common Mode Gain DB (A_cm(db)) and hit the calculate button.

FAQs on Common-Mode Rejection Ratio of MOS Controlled Source Transistor

What is the formula to find Common-Mode Rejection Ratio of MOS Controlled Source Transistor?

The formula of Common-Mode Rejection Ratio of MOS Controlled Source Transistor is expressed as Common Mode Rejection Ratio in DB = (modulus(Differential Gain DB))/(modulus(Common Mode Gain DB)). Here is an example- 18.91304 = (modulus(4.35))/(modulus(0.23)).

How to calculate Common-Mode Rejection Ratio of MOS Controlled Source Transistor?

With Differential Gain DB (A_d) & Common Mode Gain DB (A_cm(db)) we can find Common-Mode Rejection Ratio of MOS Controlled Source Transistor using the formula - Common Mode Rejection Ratio in DB = (modulus(Differential Gain DB))/(modulus(Common Mode Gain DB)). This formula also uses Modulus (modulus) function(s).

What are the other ways to Calculate Common Mode Rejection Ratio in DB?

Here are the different ways to Calculate Common Mode Rejection Ratio in DB-

Common Mode Rejection Ratio in DB=modulus(20*log10((Voltage Gain)/(Common Mode Gain DB)))

Can the Common-Mode Rejection Ratio of MOS Controlled Source Transistor be negative?

Yes, the Common-Mode Rejection Ratio of MOS Controlled Source Transistor, measured in Noise can be negative.

Which unit is used to measure Common-Mode Rejection Ratio of MOS Controlled Source Transistor?

Common-Mode Rejection Ratio of MOS Controlled Source Transistor is usually measured using the Decibel[dB] for Noise. Neper[dB], MilliDecibel[dB] are the few other units in which Common-Mode Rejection Ratio of MOS Controlled Source Transistor can be measured.

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Common-Mode Rejection Ratio of MOS Controlled Source Transistor Formula

​GoCommon-Mode Rejection Ratio of MOSFET in Decibels Formula

Common-Mode Rejection Ratio of MOS Controlled Source Transistor Example

Common-Mode Rejection Ratio of MOS Controlled Source Transistor Solution

Common-Mode Rejection Ratio of MOS Controlled Source Transistor Formula Elements

Other Formulas to find Common Mode Rejection Ratio in DB

Other formulas in Common Mode Rejection Ratio (CMRR) category

How to Evaluate Common-Mode Rejection Ratio of MOS Controlled Source Transistor?

FAQs on Common-Mode Rejection Ratio of MOS Controlled Source Transistor

Variable Name

GoCommon-Mode Rejection Ratio of MOSFET in Decibels Formula