Common-Mode Rejection Ratio of MOSFET Calculator

✖Voltage gain is a measure of the amplification of an electrical signal by an amplifier . It is the ratio of the output voltage to the input voltage of the circuit, expressed in decibels (dB).ⓘ Voltage Gain [A_v]			+10% -10%
✖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.ⓘ Common Mode Gain [A_cm]			+10% -10%

✖Common Mode Rejection Ratio is a measure of the ability of an electronic circuit, such as an amplifier, to reject noise and interference that is common to both the input signals.ⓘ Common-Mode Rejection Ratio of MOSFET [CMRR]

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Formula

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Common-Mode Rejection Ratio of MOSFET

Formula

`"CMRR" = "modulus"(("A"_{"v"})/("A"_{"cm"}))`

Example

`"0.078788"="modulus"(("0.026")/("0.33"))`

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Common-Mode Rejection Ratio of MOSFET Solution

STEP 0: Pre-Calculation Summary

Formula Used

Common Mode Rejection Ratio = modulus((Voltage Gain)/(Common Mode Gain))
CMRR = modulus((A_v)/(A_cm))
This formula uses 1 Functions, 3 Variables

Functions Used

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

Variables Used

Common Mode Rejection Ratio - Common Mode Rejection Ratio is a measure of the ability of an electronic circuit, such as an amplifier, to reject noise and interference that is common to both the input signals.
Voltage Gain - Voltage gain is a measure of the amplification of an electrical signal by an amplifier . It is the ratio of the output voltage to the input voltage of the circuit, expressed in decibels (dB).
Common Mode Gain - 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.

STEP 1: Convert Input(s) to Base Unit

Voltage Gain: 0.026 --> No Conversion Required
Common Mode Gain: 0.33 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

CMRR = modulus((A_v)/(A_cm)) --> modulus((0.026)/(0.33))

Evaluating ... ...

CMRR = 0.0787878787878788

STEP 3: Convert Result to Output's Unit

0.0787878787878788 --> No Conversion Required

FINAL ANSWER

0.0787878787878788 ≈ 0.078788 <-- Common Mode Rejection Ratio

(Calculation completed in 00.004 seconds)

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Home » Engineering » Electronics » MOSFET » Analog Electronics » Common Mode Rejection Ratio (CMRR) » Common-Mode Rejection Ratio of MOSFET

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

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Vishwakarma Government Engineering College (VGEC), Ahmedabad

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< 10+ Common Mode Rejection Ratio (CMRR) Calculators

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

Go Common Mode Rejection Ratio = Transconductance*(1/(1/Primary Winding Resistance in Secondary+1/Secondary Winding Resistance in Primary))*(2*Change in Transconductance*Finite Output Resistance)

Common-Mode Rejection Ratio of MOSFET when Transconductance Mismatches

Go Common Mode Rejection Ratio = (2*Transconductance*Output Resistance)/(Change in Transconductance/Transconductance)

Common-Mode Rejection Ratio of MOSFET given Resistance

Go Common Mode Rejection Ratio = (2*Transconductance*Output Resistance)/(Change in Drain Resistance/Drain Resistance)

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

Go Common Mode Rejection Ratio = (Transconductance*Finite Output Resistance)*(Transconductance*Source Resistance)

Common-Mode Input Signal of MOSFET

Go Common Mode Input Signal = (Total Current/Transconductance)+(2*Total Current*Total Load Resistance of MOSFET)

Common-Mode Rejection Ratio of MOS Controlled Source Transistor

Go Common Mode Rejection Ratio in DB = (modulus(Differential Gain DB))/(modulus(Common Mode Gain DB))

Common-Mode Rejection Ratio of MOSFET in Decibels

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

Common-Mode Signal of MOSFET given Output Voltage at Drain Q2

Go Drain Voltage Q1 = (2*Output Resistance*Common Mode Input Signal)/Drain Resistance

Common-Mode Signal of MOSFET given Resistance

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

Common-Mode Rejection Ratio of MOSFET

Go Common Mode Rejection Ratio = modulus((Voltage Gain)/(Common Mode Gain))

Common-Mode Rejection Ratio of MOSFET Formula

Common Mode Rejection Ratio = modulus((Voltage Gain)/(Common Mode Gain))
CMRR = modulus((A_v)/(A_cm))

What does common mode rejection do?

Common-mode rejection is the ability of the differential amplifier (which sits between the oscilloscope and probes as a signal-conditioning preamp) to eliminate the common-mode voltage from the output. But as signal frequencies rise, CMRR deteriorates.

How to Calculate Common-Mode Rejection Ratio of MOSFET?

Common-Mode Rejection Ratio of MOSFET calculator uses Common Mode Rejection Ratio = modulus((Voltage Gain)/(Common Mode Gain)) to calculate the Common Mode Rejection Ratio, The Common-mode rejection ratio of MOSFET formula is defined as refers to the amplification given to signals that appear on both inputs relative to the common (typically ground). This means the output is unaffected by voltages that are common to both inputs (i.e., no difference). Common Mode Rejection Ratio is denoted by CMRR symbol.

How to calculate Common-Mode Rejection Ratio of MOSFET using this online calculator? To use this online calculator for Common-Mode Rejection Ratio of MOSFET, enter Voltage Gain (A_v) & Common Mode Gain (A_cm) and hit the calculate button. Here is how the Common-Mode Rejection Ratio of MOSFET calculation can be explained with given input values -> 0.078788 = modulus((0.026)/(0.33)).

FAQ

What is Common-Mode Rejection Ratio of MOSFET?

The Common-mode rejection ratio of MOSFET formula is defined as refers to the amplification given to signals that appear on both inputs relative to the common (typically ground). This means the output is unaffected by voltages that are common to both inputs (i.e., no difference) and is represented as CMRR = modulus((A_v)/(A_cm)) or Common Mode Rejection Ratio = modulus((Voltage Gain)/(Common Mode Gain)). Voltage gain is a measure of the amplification of an electrical signal by an amplifier . It is the ratio of the output voltage to the input voltage of the circuit, expressed in decibels (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.

How to calculate Common-Mode Rejection Ratio of MOSFET?

The Common-mode rejection ratio of MOSFET formula is defined as refers to the amplification given to signals that appear on both inputs relative to the common (typically ground). This means the output is unaffected by voltages that are common to both inputs (i.e., no difference) is calculated using Common Mode Rejection Ratio = modulus((Voltage Gain)/(Common Mode Gain)). To calculate Common-Mode Rejection Ratio of MOSFET, you need Voltage Gain (A_v) & Common Mode Gain (A_cm). With our tool, you need to enter the respective value for Voltage Gain & Common Mode Gain and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Common Mode Rejection Ratio?

In this formula, Common Mode Rejection Ratio uses Voltage Gain & Common Mode Gain. We can use 4 other way(s) to calculate the same, which is/are as follows -

Common Mode Rejection Ratio = (2*Transconductance*Output Resistance)/(Change in Drain Resistance/Drain Resistance)
Common Mode Rejection Ratio = Transconductance*(1/(1/Primary Winding Resistance in Secondary+1/Secondary Winding Resistance in Primary))*(2*Change in Transconductance*Finite Output Resistance)
Common Mode Rejection Ratio = (Transconductance*Finite Output Resistance)*(Transconductance*Source Resistance)
Common Mode Rejection Ratio = (2*Transconductance*Output Resistance)/(Change in Transconductance/Transconductance)

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