Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance Calculator

✖Base Emitter Input Resistance is defined as the opposition offered to the current passing through the base-emitter region.ⓘ Base Emitter Input Resistance [R_BE]

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✖Differential Input Resistance is defined as a single-ended "resistor" (connected between the input and ground) in the case of differential mode.ⓘ Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance [R_id]

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Formula

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Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance

Formula

`"R"_{"id"} = 2*"R"_{"BE"}`

Example

`"27.76kΩ"=2*"13.88kΩ"`

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Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance Solution

STEP 0: Pre-Calculation Summary

Formula Used

Differential Input Resistance = 2*Base Emitter Input Resistance
R_id = 2*R_BE
This formula uses 2 Variables

Variables Used

Differential Input Resistance - (Measured in Ohm) - Differential Input Resistance is defined as a single-ended "resistor" (connected between the input and ground) in the case of differential mode.
Base Emitter Input Resistance - (Measured in Ohm) - Base Emitter Input Resistance is defined as the opposition offered to the current passing through the base-emitter region.

STEP 1: Convert Input(s) to Base Unit

Base Emitter Input Resistance: 13.88 Kilohm --> 13880 Ohm (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_id = 2*R_BE --> 2*13880

Evaluating ... ...

R_id = 27760

STEP 3: Convert Result to Output's Unit

27760 Ohm -->27.76 Kilohm (Check conversion here)

FINAL ANSWER

27.76 Kilohm <-- Differential Input Resistance

(Calculation completed in 00.004 seconds)

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< 4 Resistance Calculators

Differential Input Resistance of BJT Amplifier given Common-Emitter Current Gain

Go Differential Input Resistance = (Common Emitter Current Gain+1)*(2*Emitter Resistance+2*Change in Collector Resistance)

Differential Input Resistance of BJT Amplifier

Go Differential Input Resistance = Differential Input Voltage/Base Current

Transconductance of Small Signal Operation of BJT Amplifier

Go Transconductance = Collector Current/Threshold Voltage

Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance

Go Differential Input Resistance = 2*Base Emitter Input Resistance

Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance Formula

Differential Input Resistance = 2*Base Emitter Input Resistance
R_id = 2*R_BE

What is the function of a differential amplifier?

Differential amplifiers are used mainly to suppress noise. Noise consists of typical differential noise and common-mode noise, of which the latter can easily be suppressed with an op-amp.

How to Calculate Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance?

Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance calculator uses Differential Input Resistance = 2*Base Emitter Input Resistance to calculate the Differential Input Resistance, The Differential input resistance of BJT Amplifier given small-signal input resistance formula represents the resistance seen by the small AC input signal as it enters the amplifier. Differential Input Resistance is denoted by R_id symbol.

How to calculate Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance using this online calculator? To use this online calculator for Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance, enter Base Emitter Input Resistance (R_BE) and hit the calculate button. Here is how the Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance calculation can be explained with given input values -> 0.02778 = 2*13880.

FAQ

What is Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance?

How to calculate Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance?

The Differential input resistance of BJT Amplifier given small-signal input resistance formula represents the resistance seen by the small AC input signal as it enters the amplifier is calculated using Differential Input Resistance = 2*Base Emitter Input Resistance. To calculate Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance, you need Base Emitter Input Resistance (R_BE). With our tool, you need to enter the respective value for Base Emitter Input Resistance 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 Differential Input Resistance?

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

Differential Input Resistance = Differential Input Voltage/Base Current
Differential Input Resistance = (Common Emitter Current Gain+1)*(2*Emitter Resistance+2*Change in Collector Resistance)

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