Input Resistance of Common-Collector Amplifier Calculator

✖Fundamental component voltage is the first harmonic of the voltage in the harmonic analysis of the square wave of voltage in an inverter based circuit.ⓘ Fundamental Component Voltage [V_fc]			+10% -10%
✖Base Current is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on.ⓘ Base Current [i_b]			+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-Collector Amplifier [R_in]

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Input Resistance of Common-Collector Amplifier Solution

STEP 0: Pre-Calculation Summary

Formula Used

Input Resistance = Fundamental Component Voltage/Base Current
R_in = V_fc/i_b
This formula uses 3 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.
Fundamental Component Voltage - (Measured in Volt) - Fundamental component voltage is the first harmonic of the voltage in the harmonic analysis of the square wave of voltage in an inverter based circuit.
Base Current - (Measured in Ampere) - Base Current is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on.

STEP 1: Convert Input(s) to Base Unit

Fundamental Component Voltage: 5 Volt --> 5 Volt No Conversion Required
Base Current: 16.255 Milliampere --> 0.016255 Ampere (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_in = V_fc/i_b --> 5/0.016255

Evaluating ... ...

R_in = 307.597662257767

STEP 3: Convert Result to Output's Unit

307.597662257767 Ohm -->0.307597662257767 Kilohm (Check conversion here)

FINAL ANSWER

0.307597662257767 ≈ 0.307598 Kilohm <-- Input Resistance

(Calculation completed in 00.006 seconds)

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

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Vishwakarma Government Engineering College (VGEC), Ahmedabad

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Input Resistance of Common Emitter Amplifier

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

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

Fundamental Voltage in Common-Emitter Amplifier

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Emitter Current of Common-Base Amplifier

LaTeX Go Emitter Current = Input Voltage/Emitter Resistance

Input Resistance of Common-Collector Amplifier Formula

LaTeX Go

Input Resistance = Fundamental Component Voltage/Base Current
R_in = V_fc/i_b

What is a common collector amplifier called?

In electronics, a common collector amplifier (also known as an emitter follower) is one of three basic single-stage bipolar junction transistor (BJT) amplifier topologies, typically used as a voltage buffer.

Why common collector amplifier is called buffer?

The common base configuration has nearly unity current gain. Hence it is not a current amplifier (as it does not provide a current gain in excess of one). Because of this unity current gain, it is termed as a buffer.

How to Calculate Input Resistance of Common-Collector Amplifier?

Input Resistance of Common-Collector Amplifier calculator uses Input Resistance = Fundamental Component Voltage/Base Current to calculate the Input Resistance, The input resistance of common-collector amplifier formula is defined as resistance seen by current source or voltage source which drives circuit. Input Resistance is denoted by R_in symbol.

How to calculate Input Resistance of Common-Collector Amplifier using this online calculator? To use this online calculator for Input Resistance of Common-Collector Amplifier, enter Fundamental Component Voltage (V_fc) & Base Current (i_b) and hit the calculate button. Here is how the Input Resistance of Common-Collector Amplifier calculation can be explained with given input values -> 0.000308 = 5/0.016255.

FAQ

What is Input Resistance of Common-Collector Amplifier?

The input resistance of common-collector amplifier formula is defined as resistance seen by current source or voltage source which drives circuit and is represented as R_in = V_fc/i_b or Input Resistance = Fundamental Component Voltage/Base Current. Fundamental component voltage is the first harmonic of the voltage in the harmonic analysis of the square wave of voltage in an inverter based circuit & Base Current is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on.

How to calculate Input Resistance of Common-Collector Amplifier?

The input resistance of common-collector amplifier formula is defined as resistance seen by current source or voltage source which drives circuit is calculated using Input Resistance = Fundamental Component Voltage/Base Current. To calculate Input Resistance of Common-Collector Amplifier, you need Fundamental Component Voltage (V_fc) & Base Current (i_b). With our tool, you need to enter the respective value for Fundamental Component Voltage & Base Current 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 Fundamental Component Voltage & Base Current. We can use 3 other way(s) to calculate the same, which is/are as follows -

Input Resistance = Test Voltage/Test Current
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

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