Amplifier Power Efficiency Calculator

✖Load Power is the power delivered to load in the circuit.ⓘ Load Power [P_L]			+10% -10%
✖Input Power is defined as the power supplied to the transistor circuit at the supply terminal by the source.ⓘ Input Power [P_in]			+10% -10%

✖Power Efficiency Percentage is used to calculate the efficiency of the amplifier to minimize the power loss.ⓘ Amplifier Power Efficiency [%η_p]

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Formula

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Amplifier Power Efficiency

Formula

`"%η"_{"p"} = 100*("P"_{"L"}/"P"_{"in"})`

Example

`"88.33333"=100*("7.95W"/"9W")`

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Amplifier Power Efficiency Solution

STEP 0: Pre-Calculation Summary

Formula Used

Power Efficiency Percentage = 100*(Load Power/Input Power)
%η_p = 100*(P_L/P_in)
This formula uses 3 Variables

Variables Used

Power Efficiency Percentage - Power Efficiency Percentage is used to calculate the efficiency of the amplifier to minimize the power loss.
Load Power - (Measured in Watt) - Load Power is the power delivered to load in the circuit.
Input Power - (Measured in Watt) - Input Power is defined as the power supplied to the transistor circuit at the supply terminal by the source.

STEP 1: Convert Input(s) to Base Unit

Load Power: 7.95 Watt --> 7.95 Watt No Conversion Required
Input Power: 9 Watt --> 9 Watt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

%η_p = 100*(P_L/P_in) --> 100*(7.95/9)

Evaluating ... ...

%η_p = 88.3333333333333

STEP 3: Convert Result to Output's Unit

88.3333333333333 --> No Conversion Required

FINAL ANSWER

88.3333333333333 ≈ 88.33333 <-- Power Efficiency Percentage

(Calculation completed in 00.004 seconds)

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Home » Engineering » Electronics » Amplifiers » Amplifier Characteristics » Amplifier Power Efficiency

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Created by Devyaani Garg

Shiv Nadar University (SNU), Greater Noida

Devyaani Garg has created this Calculator and 50+ more calculators!

Verified by Payal Priya

Birsa Institute of Technology (BIT), Sindri

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< 21 Amplifier Characteristics Calculators

Base Junction Width of Amplifier

Go Base Junction Width = (Base Emitter Area*[Charge-e]*Electron Diffusivity*Thermal Equilibrium Concentration)/Saturation Current

Saturation Current

Go Saturation Current = (Base Emitter Area*[Charge-e]*Electron Diffusivity*Thermal Equilibrium Concentration)/Base Junction Width

Differential Voltage in Amplifier

Go Differential Input Signal = Output Voltage/((Resistance 4/Resistance 3)*(1+(Resistance 2)/Resistance 1))

Output Voltage for Instrumentation Amplifier

Go Output Voltage = (Resistance 4/Resistance 3)*(1+(Resistance 2)/Resistance 1)*Differential Input Signal

Voltage Gain given Load Resistance

Go Voltage Gain = Common Base Current Gain*((1/(1/Load Resistance+1/Collector Resistance))/Emitter Resistance)

Load Power of Amplifier

Go Load Power = (Positive DC Voltage*Positive DC Current)+(Negative DC Voltage*Negative DC Current)

Signal Voltage of Amplifier

Go Signal Voltage = Input Voltage*((Input Resistance+Signal Resistance)/Input Resistance)

Input Voltage of Amplifier

Go Input Voltage = (Input Resistance/(Input Resistance+Signal Resistance))*Signal Voltage

Differential Gain of Instrumentation Amplifier

Go Differential Mode Gain = (Resistance 4/Resistance 3)*(1+(Resistance 2)/Resistance 1)

Load Resistance with respect to Transconductance

Go Load Resistance = -(Output Voltage Gain*(1/Transconductance+Series Resistor))

Output Voltage Gain given Transconductance

Go Output Voltage Gain = -(Load Resistance/(1/Transconductance+Series Resistor))

Open-Circuit Transresistance

Go Open Circuit Transresistance = Output Voltage/Input Current

Amplifier Power Efficiency

Go Power Efficiency Percentage = 100*(Load Power/Input Power)

Current Gain of Amplifier in Decibels

Go Current Gain in Decibels = 20*(log10(Current Gain))

Output Voltage of Amplifier

Go Output Voltage = Voltage Gain*Input Voltage

Current Gain of Amplifier

Go Current Gain = Output Current/Input Current

Voltage Gain of Amplifier

Go Voltage Gain = Output Voltage/Input Voltage

Input Voltage at Maximum Power Dissipation

Go Input Voltage = (Peak Voltage*pi)/2

Peak Voltage at Maximum Power Dissipation

Go Peak Voltage = (2*Input Voltage)/pi

Power Gain of Amplifier

Go Power Gain = Load Power/Input Power

Open Circuit Time Constant of Amplifier

Go Open Circuit Time Constant = 1/Pole Frequency

Amplifier Power Efficiency Formula

Power Efficiency Percentage = 100*(Load Power/Input Power)
%η_p = 100*(P_L/P_in)

What does amplifier power efficiency depends on?

Amplifier power efficiency depends on several factors, including the type of amplifier (class AB, class D, etc.), the load impedance, the input signal level, and the design of the amplifier circuit. Also mainly it depends on the amount of input and output power.

How to Calculate Amplifier Power Efficiency?

Amplifier Power Efficiency calculator uses Power Efficiency Percentage = 100*(Load Power/Input Power) to calculate the Power Efficiency Percentage, The Amplifier Power Efficiency formula is an important performance parameter of an amplifier as it helps to keep track of the power loss in an amplifier and hence helps in improving its performance by minimizing the loss. Power Efficiency Percentage is denoted by %η_p symbol.

How to calculate Amplifier Power Efficiency using this online calculator? To use this online calculator for Amplifier Power Efficiency, enter Load Power (P_L) & Input Power (P_in) and hit the calculate button. Here is how the Amplifier Power Efficiency calculation can be explained with given input values -> 88.33333 = 100*(7.95/9).

FAQ

What is Amplifier Power Efficiency?

The Amplifier Power Efficiency formula is an important performance parameter of an amplifier as it helps to keep track of the power loss in an amplifier and hence helps in improving its performance by minimizing the loss and is represented as %η_p = 100*(P_L/P_in) or Power Efficiency Percentage = 100*(Load Power/Input Power). Load Power is the power delivered to load in the circuit & Input Power is defined as the power supplied to the transistor circuit at the supply terminal by the source.

How to calculate Amplifier Power Efficiency?

The Amplifier Power Efficiency formula is an important performance parameter of an amplifier as it helps to keep track of the power loss in an amplifier and hence helps in improving its performance by minimizing the loss is calculated using Power Efficiency Percentage = 100*(Load Power/Input Power). To calculate Amplifier Power Efficiency, you need Load Power (P_L) & Input Power (P_in). With our tool, you need to enter the respective value for Load Power & Input Power 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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