## 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(Vin/Vout)
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(Vin/Vout) --> 20*log10(0.055/5E-05)
Evaluating ... ...
PSRR = 60.8278537031645
STEP 3: Convert Result to Output's Unit
60.8278537031645 Decibel --> No Conversion Required
60.8278537031645 60.82785 Decibel <-- Power Supply Rejection Ratio
(Calculation completed in 00.004 seconds)
You are here -
Home »

## 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

Energy Delay Product
Energy Delay Product = ([BoltZ]*(Effective Capacitance in CMOS^2)*(Drain Voltage^3))/((Drain Voltage-Threshold Voltage)^Activity Factor)
Duty Cycle Time in CMOS
Duty Cycle = (Gates on Critical Path*Capacitance of the Gate to Channel*[BoltZ]*Drain Voltage)/(Off Current*(10^Drain Voltage))
Gates on Critical Path
Gates on Critical Path = Duty Cycle*(Off Current*(10^Drain Voltage))/(Capacitance of the Gate to Channel*[BoltZ]*Drain Voltage)
Effective Capacitance in CMOS
Effective Capacitance in CMOS = Duty Cycle*(Off Current*(10^Drain Voltage))/(Gates on Critical Path*[BoltZ]*Drain Voltage)
Subthreshold Leakage through OFF Transistors
Subthreshold Current = (CMOS Static Power/Drain Voltage)-(Gate Current+Contention Current+Junction Current)
Contention Current in Ratioed Circuits
Contention Current = (CMOS Static Power/Drain Voltage)-(Subthreshold Current+Gate Current+Junction Current)
Gate Leakage through Gate Dielectric
Gate Current = (CMOS Static Power/Drain Voltage)-(Subthreshold Current+Contention Current+Junction Current)
Capacitive Load Power Consumption = External Load Capacitance*Supply Voltage^2*Output Signal Frequency*Output Switching
Activity Factor
Activity Factor = Switching Power/(Capacitance*Drain Voltage^2*Frequency)
Switching Power
Switching Power = Activity Factor*(Capacitance*Drain Voltage^2*Frequency)
Power Supply Rejection Ratio
Power Supply Rejection Ratio = 20*log10(Input Voltage Ripple/Output Voltage Ripple)
Switching Power in CMOS
Switching Power = (Positive Voltage^2)*Frequency*Capacitance
Switching Energy in CMOS
Switching Energy in CMOS = Total Energy in CMOS-Leakage Energy in CMOS
Leakage Energy in CMOS
Leakage Energy in CMOS = Total Energy in CMOS-Switching Energy in CMOS
Total Energy in CMOS
Total Energy in CMOS = Switching Energy in CMOS+Leakage Energy in CMOS
Voltage at Minimum EDP
Voltage at Minimum EDP = (3*Threshold Voltage)/(3-Activity Factor)
CMOS Short-Circuit Power
CMOS Short-Circuit Power = CMOS Dynamic Power-Switching Power
CMOS Dynamic Power
CMOS Dynamic Power = CMOS Short-Circuit Power+Switching Power
CMOS Total Power
CMOS Total Power = CMOS Static Power+CMOS Dynamic Power
CMOS Static Power
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(Vin/Vout)

## 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 (Vin) & Output Voltage Ripple (Vout) 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(Vin/Vout) 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 (Vin) & Output Voltage Ripple (Vout). 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.
Let Others Know