Maximum Input Common-Mode Range of MOS Differential Amplifier Calculator

✖Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals.ⓘ Threshold Voltage [V_t]			+10% -10%
✖The Load Voltage is defined as the voltage between two terminals of load.ⓘ Load Voltage [V_L]			+10% -10%
✖Load resistance of MOSFET is the effective resistance of all of the circuit elements excluding the emf source.ⓘ Load Resistance [R_L]			+10% -10%

✖The common-mode range is for signal processing devices with differential inputs, such as an op-amp.ⓘ Maximum Input Common-Mode Range of MOS Differential Amplifier [V_cmr]

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Maximum Input Common-Mode Range of MOS Differential Amplifier

Formula

`"V"_{"cmr"} = "V"_{"t"}+"V"_{"L"}-(1/2*"R"_{"L"})`

Example

`"3.34V"="19.5V"+"22.64V"-(1/2*"0.0776kΩ")`

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Maximum Input Common-Mode Range of MOS Differential Amplifier Solution

STEP 0: Pre-Calculation Summary

Formula Used

Common-Mode Range = Threshold Voltage+Load Voltage-(1/2*Load Resistance)
V_cmr = V_t+V_L-(1/2*R_L)
This formula uses 4 Variables

Variables Used

Common-Mode Range - (Measured in Volt) - The common-mode range is for signal processing devices with differential inputs, such as an op-amp.
Threshold Voltage - (Measured in Volt) - Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals.
Load Voltage - (Measured in Volt) - The Load Voltage is defined as the voltage between two terminals of load.
Load Resistance - (Measured in Ohm) - Load resistance of MOSFET is the effective resistance of all of the circuit elements excluding the emf source.

STEP 1: Convert Input(s) to Base Unit

Threshold Voltage: 19.5 Volt --> 19.5 Volt No Conversion Required
Load Voltage: 22.64 Volt --> 22.64 Volt No Conversion Required
Load Resistance: 0.0776 Kilohm --> 77.6 Ohm (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

V_cmr = V_t+V_L-(1/2*R_L) --> 19.5+22.64-(1/2*77.6)

Evaluating ... ...

V_cmr = 3.34

STEP 3: Convert Result to Output's Unit

3.34 Volt --> No Conversion Required

FINAL ANSWER

3.34 Volt <-- Common-Mode Range

(Calculation completed in 00.004 seconds)

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< 9 Differential Configuration Calculators

Differential Voltage Gain in MOS Differential Amplifier

Go Differential Gain = Transconductance*(1/(Common Emitter Current Gain*Resistance of Primary Winding in Secondary)+(1/(1/(Common Emitter Current Gain*Resistance of Secondary Winding in Primary))))

Total Input Offset Voltage of MOS Differential Amplifier given Saturation Current

Go Input Offset Voltage = sqrt((Change in Collector Resistance/Collector Resistance)^2+(Saturation Current for DC/Saturation Current)^2)

Minimum Input Common-Mode Range of MOS Differential Amplifier

Go Common-Mode Range = Threshold Voltage+Effective Voltage+Voltage between Gate and Source-Load Voltage

Input Offset Voltage of MOS Differential Amplifier given Saturation Current

Go Input Offset Voltage = Threshold Voltage*(Saturation Current for DC/Saturation Current)

Input Offset Voltage of MOS Differential Amplifier when Aspect Ratio Mismatches

Go Input Offset Voltage = (Effective Voltage/2)*(Aspect Ratio/Aspect Ratio 1)

Maximum Input Common-Mode Range of MOS Differential Amplifier

Go Common-Mode Range = Threshold Voltage+Load Voltage-(1/2*Load Resistance)

Input Voltage of MOS Differential Amplifier on Small-Signal Operation

Go Input Voltage = Common-Mode DC Voltage+(1/2*Differential Input Signal)

Input Offset Voltage of MOS Differential Amplifier

Go Input Offset Voltage = Output DC Offset Voltage/Differential Gain

Transconductance of MOS Differential Amplifier on Small-Signal Operation

Go Transconductance = Total Current/Effective Voltage

Maximum Input Common-Mode Range of MOS Differential Amplifier Formula

Common-Mode Range = Threshold Voltage+Load Voltage-(1/2*Load Resistance)
V_cmr = V_t+V_L-(1/2*R_L)

Why differential amplifiers dominate modern analog ICs?

Differential amplifiers apply gain not to one input signal but to the difference between two input signals. This means that a differential amplifier naturally eliminates noise or interference that is present in both input signals. Differential amplification also suppresses common-mode signals—in other words, a DC offset that is present in both input signals will be removed, and the gain will be applied only to the signal of interest (assuming, of course, that the signal of interest is not present in both inputs). This is particularly advantageous in the context of IC design because it eliminates the need for bulky DC-blocking capacitors. The subtraction that occurs in a differential pair makes it easy to incorporate the circuit into a negative-feedback amplifier, and if you’ve read the Negative Feedback series, you know that negative feedback is about the best thing that could ever happen to an amplifier circuit.

How to Calculate Maximum Input Common-Mode Range of MOS Differential Amplifier?

Maximum Input Common-Mode Range of MOS Differential Amplifier calculator uses Common-Mode Range = Threshold Voltage+Load Voltage-(1/2*Load Resistance) to calculate the Common-Mode Range, maximum input common-mode range of MOS differential amplifier formula is for signal processing devices with differential inputs, such as op-amp, CMVR is range of common-mode signal for which amplifier's operation remains linear. Common-Mode Range is denoted by V_cmr symbol.

How to calculate Maximum Input Common-Mode Range of MOS Differential Amplifier using this online calculator? To use this online calculator for Maximum Input Common-Mode Range of MOS Differential Amplifier, enter Threshold Voltage (V_t), Load Voltage (V_L) & Load Resistance (R_L) and hit the calculate button. Here is how the Maximum Input Common-Mode Range of MOS Differential Amplifier calculation can be explained with given input values -> 13.34 = 19.5+22.64-(1/2*77.6).

FAQ

What is Maximum Input Common-Mode Range of MOS Differential Amplifier?

maximum input common-mode range of MOS differential amplifier formula is for signal processing devices with differential inputs, such as op-amp, CMVR is range of common-mode signal for which amplifier's operation remains linear and is represented as V_cmr = V_t+V_L-(1/2*R_L) or Common-Mode Range = Threshold Voltage+Load Voltage-(1/2*Load Resistance). Threshold voltage of transistor is the minimum gate to source voltage that is needed to create a conducting path between the source and drain terminals, The Load Voltage is defined as the voltage between two terminals of load & Load resistance of MOSFET is the effective resistance of all of the circuit elements excluding the emf source.

How to calculate Maximum Input Common-Mode Range of MOS Differential Amplifier?

maximum input common-mode range of MOS differential amplifier formula is for signal processing devices with differential inputs, such as op-amp, CMVR is range of common-mode signal for which amplifier's operation remains linear is calculated using Common-Mode Range = Threshold Voltage+Load Voltage-(1/2*Load Resistance). To calculate Maximum Input Common-Mode Range of MOS Differential Amplifier, you need Threshold Voltage (V_t), Load Voltage (V_L) & Load Resistance (R_L). With our tool, you need to enter the respective value for Threshold Voltage, Load Voltage & Load Resistance 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 Range?

In this formula, Common-Mode Range uses Threshold Voltage, Load Voltage & Load Resistance. We can use 1 other way(s) to calculate the same, which is/are as follows -

Common-Mode Range = Threshold Voltage+Effective Voltage+Voltage between Gate and Source-Load Voltage

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