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 [P_sr]

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Formula

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Power Supply Rejection Ratio

Formula

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

Example

`"2.963504dB"=20*log10("7.23V"/"5.14V")`

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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)
P_sr = 20*log10(V_in/V_out)
This formula uses 1 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)

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: 7.23 Volt --> 7.23 Volt No Conversion Required
Output Voltage Ripple: 5.14 Volt --> 5.14 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

P_sr = 20*log10(V_in/V_out) --> 20*log10(7.23/5.14)

Evaluating ... ...

P_sr = 2.9635035659851

STEP 3: Convert Result to Output's Unit

2.9635035659851 Decibel --> No Conversion Required

FINAL ANSWER

2.9635035659851 ≈ 2.963504 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 9 more calculators!

Verified by Rachita C

BMS College Of Engineering (BMSCE), Banglore

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< 17 CMOS Power Metrics Calculators

Gates on Critical Path

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

Subthreshold Leakage through OFF Transistors

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

Contention Current in Ratioed Circuits

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

Gate Leakage through Gate Dielectric

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

Output Switching at Load Power Consumption

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

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*Base Collector Voltage^2*Frequency)

Switching Power

Go Switching Power = Activity Factor*(Capacitance*Base Collector 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

Short-Circuit Power in CMOS

Go Short-Circuit Power = Dynamic Power-Switching Power

Dynamic Power in CMOS

Go Dynamic Power = Short-Circuit Power+Switching Power

Static Power in CMOS

Go CMOS Static Power = Total Power-Dynamic Power

Total Power in CMOS

Go Total Power = CMOS Static Power+Dynamic Power

Power Supply Rejection Ratio Formula

Power Supply Rejection Ratio = 20*log10(Input Voltage Ripple/Output Voltage Ripple)
P_sr = 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 P_sr 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 -> 2.963504 = 20*log10(7.23/5.14).

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 P_sr = 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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