Input Resistance of Common-Emitter Amplifier given Emitter Resistance Calculator

✖Base resistance is a measure of the opposition to current flow in an electrical circuit.ⓘ Base Resistance [R_b]			+10% -10%
✖Base resistance 2 is a measure of the opposition to current flow in an electrical circuit.ⓘ Base Resistance 2 [R_b2]			+10% -10%
✖Total resistance is defined as the sum of all the resistances present in the circuit of a transistor amplifier.ⓘ Total Resistance [R_t]			+10% -10%
✖Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor.ⓘ Emitter Resistance [R_e]			+10% -10%
✖Collector Base Current Gain is a term used in electronic circuits to describe the maximum current that a collector-emitter junction of a transistor can tolerate without breaking down.ⓘ Collector Base Current Gain [β]			+10% -10%

✖Input resistance 2 is the opposition that an electrical component or circuit presents to the flow of electrical current when a voltage is applied to it.ⓘ Input Resistance of Common-Emitter Amplifier given Emitter Resistance [R_in]

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Formula

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Input Resistance of Common-Emitter Amplifier given Emitter Resistance

Formula

`"R"_{"in"} = (1/"R"_{"b"}+1/"R"_{"b2"}+1/(("R"_{"t"}+"R"_{"e"})*("β"+1)))^-1`

Example

`"0.307648kΩ"=(1/"1.213kΩ"+1/"0.534kΩ"+1/(("0.072kΩ"+"0.067kΩ")*("12"+1)))^-1`

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Input Resistance of Common-Emitter Amplifier given Emitter Resistance Solution

STEP 0: Pre-Calculation Summary

Formula Used

Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/((Total Resistance+Emitter Resistance)*(Collector Base Current Gain+1)))^-1
R_in = (1/R_b+1/R_b2+1/((R_t+R_e)*(β+1)))^-1
This formula uses 6 Variables

Variables Used

Input Resistance - (Measured in Ohm) - Input resistance 2 is the opposition that an electrical component or circuit presents to the flow of electrical current when a voltage is applied to it.
Base Resistance - (Measured in Ohm) - Base resistance is a measure of the opposition to current flow in an electrical circuit.
Base Resistance 2 - (Measured in Ohm) - Base resistance 2 is a measure of the opposition to current flow in an electrical circuit.
Total Resistance - (Measured in Ohm) - Total resistance is defined as the sum of all the resistances present in the circuit of a transistor amplifier.
Emitter Resistance - (Measured in Ohm) - Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor.
Collector Base Current Gain - Collector Base Current Gain is a term used in electronic circuits to describe the maximum current that a collector-emitter junction of a transistor can tolerate without breaking down.

STEP 1: Convert Input(s) to Base Unit

Base Resistance: 1.213 Kilohm --> 1213 Ohm (Check conversion here)
Base Resistance 2: 0.534 Kilohm --> 534 Ohm (Check conversion here)
Total Resistance: 0.072 Kilohm --> 72 Ohm (Check conversion here)
Emitter Resistance: 0.067 Kilohm --> 67 Ohm (Check conversion here)
Collector Base Current Gain: 12 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_in = (1/R_b+1/R_b2+1/((R_t+R_e)*(β+1)))^-1 --> (1/1213+1/534+1/((72+67)*(12+1)))^-1

Evaluating ... ...

R_in = 307.648298323254

STEP 3: Convert Result to Output's Unit

307.648298323254 Ohm -->0.307648298323254 Kilohm (Check conversion here)

FINAL ANSWER

0.307648298323254 ≈ 0.307648 Kilohm <-- Input Resistance

(Calculation completed in 00.020 seconds)

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Birsa Institute of Technology (BIT), Sindri

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< 8 Common-Emitter Amplifier Calculators

Overall Feedback Voltage Gain of Common-Collector Amplifier

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

Overall Voltage Gain of Common-Emitter Amplifier

Go Feedback Voltage Gain = -MOSFET Primary Transconductance*(Input Resistance/(Input Resistance+Signal Resistance))*(1/Collector Resistance+1/Load Resistance+1/Finite Output Resistance)^-1

Overall Feedback Voltage Gain of Common-Emitter Amplifier

Go Feedback Voltage Gain = -Common Base Current Gain*Collector Resistance/Emitter Resistance*(Input Resistance/(Input Resistance+Signal Resistance))

Output Resistance of Emitter-Degenerated CE Amplifier

Go Drain Resistance = Finite Output Resistance+(MOSFET Primary Transconductance*Finite Output Resistance)*(1/Emitter Resistance+1/Small Signal Input Resistance)

Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance

Go Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/(Small Signal Input Resistance+(Collector Base Current Gain+1)*Emitter Resistance))^-1

Input Resistance of Common-Emitter Amplifier given Emitter Resistance

Go Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/((Total Resistance+Emitter Resistance)*(Collector Base Current Gain+1)))^-1

Input Resistance of Common Emitter Amplifier

Go Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/Small Signal Input Resistance)^-1

Fundamental Voltage in Common-Emitter Amplifier

Go Fundamental Component Voltage = Input Resistance*Base Current

< 18 CV Actions of Common Stage Amplifiers Calculators

Output Voltage of Controlled Source Transistor

Go DC Component of Gate to Source Voltage = (Voltage Gain*Electric Current-Short Circuit Transconductance*Differential Output Signal)*(1/Final Resistance+1/Resistance of Primary Winding in Secondary)

Input Resistance of Common-Base Circuit

Go Input Resistance = (Emitter Resistance*(Finite Output Resistance+Load Resistance))/(Finite Output Resistance+(Load Resistance/(Collector Base Current Gain+1)))

Output Resistance at Another Drain of Controlled Source Transistor

Go Drain Resistance = Resistance of Secondary Winding in Primary+2*Finite Resistance+2*Finite Resistance*MOSFET Primary Transconductance*Resistance of Secondary Winding in Primary

Output Resistance of Emitter-Degenerated CE Amplifier

Go Drain Resistance = Finite Output Resistance+(MOSFET Primary Transconductance*Finite Output Resistance)*(1/Emitter Resistance+1/Small Signal Input Resistance)

Input Resistance of Common Emitter Amplifier given Small-Signal Input Resistance

Go Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/(Small Signal Input Resistance+(Collector Base Current Gain+1)*Emitter Resistance))^-1

Output Resistance of CS Amplifier with Source Resistance

Go Drain Resistance = Finite Output Resistance+Source Resistance+(MOSFET Primary Transconductance*Finite Output Resistance*Source Resistance)

Input Resistance of Common-Emitter Amplifier given Emitter Resistance

Go Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/((Total Resistance+Emitter Resistance)*(Collector Base Current Gain+1)))^-1

Instantaneous Drain Current using Voltage between Drain and Source

Go Drain Current = Transconductance Parameter*(Voltage across Oxide-Threshold Voltage)*Voltage between Gate and Source

Transconductance in Common Source Amplifier

Go MOSFET Primary Transconductance = Unity Gain Frequency*(Gate to Source Capacitance+Capacitance Gate to Drain)

Input Resistance of Common Emitter Amplifier

Go Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/Small Signal Input Resistance)^-1

Input Impedance of Common-Base Amplifier

Go Input Impedance = (1/Emitter Resistance+1/Small Signal Input Resistance)^(-1)

Signal Current in Emitter given Input Signal

Go Signal Current in Emitter = Fundamental Component Voltage/Emitter Resistance

Transconductance using Collector Current of Transistor Amplifier

Go MOSFET Primary Transconductance = Collector Current/Threshold Voltage

Fundamental Voltage in Common-Emitter Amplifier

Go Fundamental Component Voltage = Input Resistance*Base Current

Input Resistance of Common-Collector Amplifier

Go Input Resistance = Fundamental Component Voltage/Base Current

Resistance of Emitter in Common-Base Amplifier

Go Emitter Resistance = Input Voltage/Emitter Current

Emitter Current of Common-Base Amplifier

Go Emitter Current = Input Voltage/Emitter Resistance

Load Voltage of CS Amplifier

Go Load Voltage = Voltage Gain*Input Voltage

Input Resistance of Common-Emitter Amplifier given Emitter Resistance Formula

Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/((Total Resistance+Emitter Resistance)*(Collector Base Current Gain+1)))^-1
R_in = (1/R_b+1/R_b2+1/((R_t+R_e)*(β+1)))^-1

What does a common emitter amplifier do?

The common emitter amplifier configuration provides voltage gain and is one of the most widely used transistor configurations for electronic circuit design. The common emitter transistor amplifier circuit is one of the mainstay circuits for use within electronic circuit design offers many advantages.

How to Calculate Input Resistance of Common-Emitter Amplifier given Emitter Resistance?

Input Resistance of Common-Emitter Amplifier given Emitter Resistance calculator uses Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/((Total Resistance+Emitter Resistance)*(Collector Base Current Gain+1)))^-1 to calculate the Input Resistance, The Input resistance of common-emitter amplifier given emitter resistance formula is defined as the opposition offered to the flow of the current of the electrical circuit. Input Resistance is denoted by R_in symbol.

How to calculate Input Resistance of Common-Emitter Amplifier given Emitter Resistance using this online calculator? To use this online calculator for Input Resistance of Common-Emitter Amplifier given Emitter Resistance, enter Base Resistance (R_b), Base Resistance 2 (R_b2), Total Resistance (R_t), Emitter Resistance (R_e) & Collector Base Current Gain (β) and hit the calculate button. Here is how the Input Resistance of Common-Emitter Amplifier given Emitter Resistance calculation can be explained with given input values -> 0.000308 = (1/1213+1/534+1/((72+67)*(12+1)))^-1.

FAQ

What is Input Resistance of Common-Emitter Amplifier given Emitter Resistance?

The Input resistance of common-emitter amplifier given emitter resistance formula is defined as the opposition offered to the flow of the current of the electrical circuit and is represented as R_in = (1/R_b+1/R_b2+1/((R_t+R_e)*(β+1)))^-1 or Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/((Total Resistance+Emitter Resistance)*(Collector Base Current Gain+1)))^-1. Base resistance is a measure of the opposition to current flow in an electrical circuit, Base resistance 2 is a measure of the opposition to current flow in an electrical circuit, Total resistance is defined as the sum of all the resistances present in the circuit of a transistor amplifier, Emitter Resistance is a dynamic resistance of the emitter-base junction diode of a transistor & Collector Base Current Gain is a term used in electronic circuits to describe the maximum current that a collector-emitter junction of a transistor can tolerate without breaking down.

How to calculate Input Resistance of Common-Emitter Amplifier given Emitter Resistance?

The Input resistance of common-emitter amplifier given emitter resistance formula is defined as the opposition offered to the flow of the current of the electrical circuit is calculated using Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/((Total Resistance+Emitter Resistance)*(Collector Base Current Gain+1)))^-1. To calculate Input Resistance of Common-Emitter Amplifier given Emitter Resistance, you need Base Resistance (R_b), Base Resistance 2 (R_b2), Total Resistance (R_t), Emitter Resistance (R_e) & Collector Base Current Gain (β). With our tool, you need to enter the respective value for Base Resistance, Base Resistance 2, Total Resistance, Emitter Resistance & Collector Base Current Gain 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 Resistance?

In this formula, Input Resistance uses Base Resistance, Base Resistance 2, Total Resistance, Emitter Resistance & Collector Base Current Gain. We can use 6 other way(s) to calculate the same, which is/are as follows -

Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/Small Signal Input Resistance)^-1
Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/(Small Signal Input Resistance+(Collector Base Current Gain+1)*Emitter Resistance))^-1
Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/Small Signal Input Resistance)^-1
Input Resistance = (1/Base Resistance+1/Base Resistance 2+1/(Small Signal Input Resistance+(Collector Base Current Gain+1)*Emitter Resistance))^-1
Input Resistance = (Emitter Resistance*(Finite Output Resistance+Load Resistance))/(Finite Output Resistance+(Load Resistance/(Collector Base Current Gain+1)))
Input Resistance = Fundamental Component Voltage/Base Current

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