Power Supply Rejection Ratio Calculator

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✖Input Voltage Ripple is the ripple voltage of the input.ⓘ Input Voltage Ripple [V_in]			+10% -10%
✖Output Voltage Ripple is the ripple voltage of the output.ⓘ Output Voltage Ripple [V_out]			+10% -10%

✖Power Supply Rejection Ratio is the ratio of the change in input offset voltage with respect to the change in power supply voltage.ⓘ Power Supply Rejection Ratio [PSRR]

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Formula

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Power Supply Rejection Ratio

Formula

`"PSRR" = 20*log10("V"_{"in"}/"V"_{"out"})`

Example

`"60.82785dB"=20*log10("0.055V"/"0.00005V")`

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Power Supply Rejection Ratio Solution

STEP 0: Pre-Calculation Summary

Formula Used

Power Supply Rejection Ratio = 20*log10(Input Voltage Ripple/Output Voltage Ripple)
PSRR = 20*log10(V_in/V_out)
This formula uses 1 Functions, 3 Variables

Functions Used

log10 - Common logarithm function (base 10), log10(Number)

Variables Used

Power Supply Rejection Ratio - (Measured in Decibel) - Power Supply Rejection Ratio is the ratio of the change in input offset voltage with respect to the change in power supply voltage.
Input Voltage Ripple - (Measured in Volt) - Input Voltage Ripple is the ripple voltage of the input.
Output Voltage Ripple - (Measured in Volt) - Output Voltage Ripple is the ripple voltage of the output.

STEP 1: Convert Input(s) to Base Unit

Input Voltage Ripple: 0.055 Volt --> 0.055 Volt No Conversion Required
Output Voltage Ripple: 5E-05 Volt --> 5E-05 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

PSRR = 20*log10(V_in/V_out) --> 20*log10(0.055/5E-05)

Evaluating ... ...

PSRR = 60.8278537031645

STEP 3: Convert Result to Output's Unit

60.8278537031645 Decibel --> No Conversion Required

FINAL ANSWER

60.8278537031645 ≈ 60.82785 Decibel <-- Power Supply Rejection Ratio

(Calculation completed in 00.004 seconds)

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Credits

Created by Shashank

Nitte Meenakshi Institute of Technology (NMIT), Bangalore

Shashank has created this Calculator and 10+ more calculators!

Verified by Rachita C

BMS College Of Engineering (BMSCE), Banglore

Rachita C has verified this Calculator and 50+ more calculators!

< 20 Power Calculators

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Go Energy Delay Product = ([BoltZ]*(Effective Capacitance in CMOS^2)*(Drain Voltage^3))/((Drain Voltage-Threshold Voltage)^Activity Factor)

Duty Cycle Time in CMOS

Go Duty Cycle = (Gates on Critical Path*Capacitance of the Gate to Channel*[BoltZ]*Drain Voltage)/(Off Current*(10^Drain Voltage))

Gates on Critical Path

Go Gates on Critical Path = Duty Cycle*(Off Current*(10^Drain Voltage))/(Capacitance of the Gate to Channel*[BoltZ]*Drain Voltage)

Effective Capacitance in CMOS

Go Effective Capacitance in CMOS = Duty Cycle*(Off Current*(10^Drain Voltage))/(Gates on Critical Path*[BoltZ]*Drain Voltage)

Subthreshold Leakage through OFF Transistors

Go Subthreshold Current = (CMOS Static Power/Drain Voltage)-(Gate Current+Contention Current+Junction Current)

Contention Current in Ratioed Circuits

Go Contention Current = (CMOS Static Power/Drain Voltage)-(Subthreshold Current+Gate Current+Junction Current)

Gate Leakage through Gate Dielectric

Go Gate Current = (CMOS Static Power/Drain Voltage)-(Subthreshold Current+Contention Current+Junction Current)

Capacitive Load Power Consumption

Go Capacitive Load Power Consumption = External Load Capacitance*Supply Voltage^2*Output Signal Frequency*Output Switching

Activity Factor

Go Activity Factor = Switching Power/(Capacitance*Drain Voltage^2*Frequency)

Switching Power

Go Switching Power = Activity Factor*(Capacitance*Drain Voltage^2*Frequency)

Power Supply Rejection Ratio

Go Power Supply Rejection Ratio = 20*log10(Input Voltage Ripple/Output Voltage Ripple)

Switching Power in CMOS

Go Switching Power = (Positive Voltage^2)*Frequency*Capacitance

Switching Energy in CMOS

Go Switching Energy in CMOS = Total Energy in CMOS-Leakage Energy in CMOS

Leakage Energy in CMOS

Go Leakage Energy in CMOS = Total Energy in CMOS-Switching Energy in CMOS

Total Energy in CMOS

Go Total Energy in CMOS = Switching Energy in CMOS+Leakage Energy in CMOS

Voltage at Minimum EDP

Go Voltage at Minimum EDP = (3*Threshold Voltage)/(3-Activity Factor)

CMOS Short-Circuit Power

Go CMOS Short-Circuit Power = CMOS Dynamic Power-Switching Power

CMOS Dynamic Power

Go CMOS Dynamic Power = CMOS Short-Circuit Power+Switching Power

CMOS Total Power

Go CMOS Total Power = CMOS Static Power+CMOS Dynamic Power

CMOS Static Power

Go CMOS Static Power = CMOS Total Power-CMOS Dynamic Power

Power Supply Rejection Ratio Formula

Power Supply Rejection Ratio = 20*log10(Input Voltage Ripple/Output Voltage Ripple)
PSRR = 20*log10(V_in/V_out)

What is Power Supply Rejection Ratio?

The Power Supply Rejection Ratio (PSRR) is defined as the absolute value of the ratio of the change in supply voltages to the resulting change in input offset voltage. The PSRR provides us with an indication of the degree of immunity the circuit has to noise voltages on the DC power lines.

How to Calculate Power Supply Rejection Ratio?

Power Supply Rejection Ratio calculator uses Power Supply Rejection Ratio = 20*log10(Input Voltage Ripple/Output Voltage Ripple) to calculate the Power Supply Rejection Ratio, The Power Supply rejection ratio is the ratio of the change in input offset voltage with respect to the change in power supply voltage. Power Supply Rejection Ratio is denoted by PSRR symbol.

How to calculate Power Supply Rejection Ratio using this online calculator? To use this online calculator for Power Supply Rejection Ratio, enter Input Voltage Ripple (V_in) & Output Voltage Ripple (V_out) and hit the calculate button. Here is how the Power Supply Rejection Ratio calculation can be explained with given input values -> 60.82785 = 20*log10(0.055/5E-05).

FAQ

What is Power Supply Rejection Ratio?

The Power Supply rejection ratio is the ratio of the change in input offset voltage with respect to the change in power supply voltage and is represented as PSRR = 20*log10(V_in/V_out) or Power Supply Rejection Ratio = 20*log10(Input Voltage Ripple/Output Voltage Ripple). Input Voltage Ripple is the ripple voltage of the input & Output Voltage Ripple is the ripple voltage of the output.

How to calculate Power Supply Rejection Ratio?

The Power Supply rejection ratio is the ratio of the change in input offset voltage with respect to the change in power supply voltage is calculated using Power Supply Rejection Ratio = 20*log10(Input Voltage Ripple/Output Voltage Ripple). To calculate Power Supply Rejection Ratio, you need Input Voltage Ripple (V_in) & Output Voltage Ripple (V_out). With our tool, you need to enter the respective value for Input Voltage Ripple & Output Voltage Ripple and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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