Common-Mode Rejection Ratio of MOSFET in Decibels 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 DB [A_cm(db)]			+10% -10%

✖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.ⓘ Common-Mode Rejection Ratio of MOSFET in Decibels [CMRR_db]

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Common-Mode Rejection Ratio of MOSFET in Decibels Solution

STEP 0: Pre-Calculation Summary

Formula Used

Common Mode Rejection Ratio in DB = modulus(20*log10((Voltage Gain)/(Common Mode Gain DB)))
CMRR_db = modulus(20*log10((A_v)/(A_cm(db))))
This formula uses 2 Functions, 3 Variables

Functions Used

log10 - The common logarithm, also known as the base-10 logarithm or the decimal logarithm, is a mathematical function that is the inverse of the exponential function., log10(Number)
modulus - Modulus of a number is the remainder when that number is divided by another number., modulus

Variables Used

Common Mode Rejection Ratio in DB - (Measured in Decibel) - 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.
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 DB - (Measured in Decibel) - 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 DB: 0.23 Decibel --> 0.23 Decibel No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

CMRR_db = modulus(20*log10((A_v)/(A_cm(db)))) --> modulus(20*log10((0.026)/(0.23)))

Evaluating ... ...

CMRR_db = 18.9350897609355

STEP 3: Convert Result to Output's Unit

18.9350897609355 Decibel --> No Conversion Required

FINAL ANSWER

18.9350897609355 ≈ 18.93509 Decibel <-- Common Mode Rejection Ratio in DB

(Calculation completed in 00.004 seconds)

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Birsa Institute of Technology (BIT), Sindri

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< Common Mode Rejection Ratio (CMRR) Calculators

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

LaTeX 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 given Resistance

LaTeX 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

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

Common-Mode Signal of MOSFET given Resistance

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

Common-Mode Rejection Ratio of MOSFET in Decibels Formula

LaTeX Go

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

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 in Decibels?

Common-Mode Rejection Ratio of MOSFET in Decibels calculator uses Common Mode Rejection Ratio in DB = modulus(20*log10((Voltage Gain)/(Common Mode Gain DB))) to calculate the Common Mode Rejection Ratio in DB, The Common-mode rejection ratio of MOSFET in decibels formula is defined as a differential amplifier (or other devices) is a metric used to quantify the ability of the 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 calculate Common-Mode Rejection Ratio of MOSFET in Decibels using this online calculator? To use this online calculator for Common-Mode Rejection Ratio of MOSFET in Decibels, enter Voltage Gain (A_v) & Common Mode Gain DB (A_cm(db)) and hit the calculate button. Here is how the Common-Mode Rejection Ratio of MOSFET in Decibels calculation can be explained with given input values -> 18.93509 = modulus(20*log10((0.026)/(0.23))).

FAQ

What is Common-Mode Rejection Ratio of MOSFET in Decibels?

The Common-mode rejection ratio of MOSFET in decibels formula is defined as a differential amplifier (or other devices) is a metric used to quantify the ability of the device to reject common-mode signals, i.e. those that appear simultaneously and in-phase on both inputs and is represented as CMRR_db = modulus(20*log10((A_v)/(A_cm(db)))) or Common Mode Rejection Ratio in DB = modulus(20*log10((Voltage Gain)/(Common Mode Gain DB))). 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 in Decibels?

The Common-mode rejection ratio of MOSFET in decibels formula is defined as a differential amplifier (or other devices) is a metric used to quantify the ability of the device to reject common-mode signals, i.e. those that appear simultaneously and in-phase on both inputs is calculated using Common Mode Rejection Ratio in DB = modulus(20*log10((Voltage Gain)/(Common Mode Gain DB))). To calculate Common-Mode Rejection Ratio of MOSFET in Decibels, you need Voltage Gain (A_v) & Common Mode Gain DB (A_cm(db)). With our tool, you need to enter the respective value for Voltage Gain & Common Mode Gain DB 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 DB?

In this formula, Common Mode Rejection Ratio in DB uses Voltage Gain & Common Mode Gain DB. We can use 1 other way(s) to calculate the same, which is/are as follows -

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

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