Input Voltage of Amplifier Calculator

✖The input resistance is the resistance seen by the current source or voltage source which drives the circuit.ⓘ Input Resistance [R_in]			+10% -10%
✖Signal Resistance is the resistance which is fed with the signal voltage source to an amplifier.ⓘ Signal Resistance [R_si]			+10% -10%
✖Signal Voltage refers to the voltage of the input signal that the amplifier is designed to amplify. It is typically measured in volts (V).ⓘ Signal Voltage [V_si]			+10% -10%

✖Input Voltage is the voltage applied by a source from the input terminal.ⓘ Input Voltage of Amplifier [V_in]

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Formula

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Input Voltage of Amplifier

Formula

`"V"_{"in"} = ("R"_{"in"}/("R"_{"in"}+"R"_{"si"}))*"V"_{"si"}`

Example

`"9.57265V"=("28kΩ"/("28kΩ"+"1.25kΩ"))*"10V"`

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Input Voltage of Amplifier Solution

STEP 0: Pre-Calculation Summary

Formula Used

Input Voltage = (Input Resistance/(Input Resistance+Signal Resistance))*Signal Voltage
V_in = (R_in/(R_in+R_si))*V_si
This formula uses 4 Variables

Variables Used

Input Voltage - (Measured in Volt) - Input Voltage is the voltage applied by a source from the input terminal.
Input Resistance - (Measured in Ohm) - The input resistance is the resistance seen by the current source or voltage source which drives the circuit.
Signal Resistance - (Measured in Ohm) - Signal Resistance is the resistance which is fed with the signal voltage source to an amplifier.
Signal Voltage - (Measured in Volt) - Signal Voltage refers to the voltage of the input signal that the amplifier is designed to amplify. It is typically measured in volts (V).

STEP 1: Convert Input(s) to Base Unit

Input Resistance: 28 Kilohm --> 28000 Ohm (Check conversion here)
Signal Resistance: 1.25 Kilohm --> 1250 Ohm (Check conversion here)
Signal Voltage: 10 Volt --> 10 Volt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

V_in = (R_in/(R_in+R_si))*V_si --> (28000/(28000+1250))*10

Evaluating ... ...

V_in = 9.57264957264957

STEP 3: Convert Result to Output's Unit

9.57264957264957 Volt --> No Conversion Required

FINAL ANSWER

9.57264957264957 ≈ 9.57265 Volt <-- Input Voltage

(Calculation completed in 00.004 seconds)

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Home » Engineering » Electronics » Amplifiers » Amplifier Characteristics » Input Voltage of Amplifier

Credits

Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has created this Calculator and 600+ more calculators!

Verified by Anshika Arya

National Institute Of Technology (NIT), Hamirpur

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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

Input Voltage of Amplifier Formula

Input Voltage = (Input Resistance/(Input Resistance+Signal Resistance))*Signal Voltage
V_in = (R_in/(R_in+R_si))*V_si

What is the function of amplifier?

An amplifier is an electronic device that increases the voltage, current, or power of a signal. Amplifiers are used in wireless communications and broadcasting, and in audio equipment of all kinds. They can be categorized as either weak-signal amplifiers or power amplifiers.

How to Calculate Input Voltage of Amplifier?

Input Voltage of Amplifier calculator uses Input Voltage = (Input Resistance/(Input Resistance+Signal Resistance))*Signal Voltage to calculate the Input Voltage, The input voltage of amplifier refers to the voltage level at which the amplifier can accurately amplify the input signal. Input Voltage is denoted by V_in symbol.

How to calculate Input Voltage of Amplifier using this online calculator? To use this online calculator for Input Voltage of Amplifier, enter Input Resistance (R_in), Signal Resistance (R_si) & Signal Voltage (V_si) and hit the calculate button. Here is how the Input Voltage of Amplifier calculation can be explained with given input values -> 9.57265 = (28000/(28000+1250))*10.

FAQ

What is Input Voltage of Amplifier?

The input voltage of amplifier refers to the voltage level at which the amplifier can accurately amplify the input signal and is represented as V_in = (R_in/(R_in+R_si))*V_si or Input Voltage = (Input Resistance/(Input Resistance+Signal Resistance))*Signal Voltage. The input resistance is the resistance seen by the current source or voltage source which drives the circuit, Signal Resistance is the resistance which is fed with the signal voltage source to an amplifier & Signal Voltage refers to the voltage of the input signal that the amplifier is designed to amplify. It is typically measured in volts (V).

How to calculate Input Voltage of Amplifier?

The input voltage of amplifier refers to the voltage level at which the amplifier can accurately amplify the input signal is calculated using Input Voltage = (Input Resistance/(Input Resistance+Signal Resistance))*Signal Voltage. To calculate Input Voltage of Amplifier, you need Input Resistance (R_in), Signal Resistance (R_si) & Signal Voltage (V_si). With our tool, you need to enter the respective value for Input Resistance, Signal Resistance & Signal Voltage 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 Input Voltage?

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

Input Voltage = (Peak Voltage*pi)/2

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