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Output Resistance of Widlar Current Source Formula

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Output Resistance of Widlar Current Source is the calculated resistance value obtained by adding the inverese values of individual resistors values. Check FAQs

R wcs = (1 + g m) \cdot ((\frac{1}{R e}) + (\frac{1}{R sbe})) \cdot R fo

R_wcs - Output Resistance of Widlar Current Source?g_m - Transconductance?R_e - Emitter Resistance?R_sbe - Small-Signal Input Resistance b/w Base-Emitter?R_fo - Finite Output Resistance?

Output Resistance of Widlar Current Source Example

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Here is how the Output Resistance of Widlar Current Source equation looks like with Values.

Here is how the Output Resistance of Widlar Current Source equation looks like with Units.

Here is how the Output Resistance of Widlar Current Source equation looks like.

0.0021 = (1 + 0.25) \cdot ((\frac{1}{0.909}) + (\frac{1}{20})) \cdot 1.45

0.0021kΩ = (1 + 0.25S) \cdot ((\frac{1}{0.909kΩ}) + (\frac{1}{20kΩ})) \cdot 1.45kΩ

0.0021 = (1 + 0.25) \cdot ((\frac{1}{0.909}) + (\frac{1}{20})) \cdot 1.45

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Output Resistance of Widlar Current Source Solution

Follow our step by step solution on how to calculate Output Resistance of Widlar Current Source?

FIRST Step Consider the formula

R wcs = (1 + g m) \cdot ((\frac{1}{R e}) + (\frac{1}{R sbe})) \cdot R fo

Next Step Substitute values of Variables

∴

R wcs = (1 + 0.25S) \cdot ((\frac{1}{0.909kΩ}) + (\frac{1}{20kΩ})) \cdot 1.45kΩ

Next Step Convert Units

∴

R wcs = (1 + 0.25S) \cdot ((\frac{1}{909Ω}) + (\frac{1}{20000Ω})) \cdot 1450Ω

Next Step Prepare to Evaluate

∴

R wcs = (1 + 0.25) \cdot ((\frac{1}{909}) + (\frac{1}{20000})) \cdot 1450

Next Step Evaluate

∴

R wcs = 2.08457439493949Ω

Next Step Convert to Output's Unit

∴

R wcs = 0.00208457439493949kΩ

LAST Step Rounding Answer

∴

R wcs = 0.0021kΩ

Output Resistance of Widlar Current Source Formula Elements

Variables

Output Resistance of Widlar Current Source

Output Resistance of Widlar Current Source is the calculated resistance value obtained by adding the inverese values of individual resistors values.

Symbol: R_wcs

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Output Resistance of Widlar Current Source

Transconductance

Transconductance is the change in the drain current divided by the small change in the gate/source voltage with a constant drain/source voltage.

Symbol: g_m

Measurement: Electric ConductanceUnit: S

Note: Value should be greater than 0.

Formulas to find Transconductance

Emitter Resistance

Emitter Resistance is the emitter-degeneration resistance of the emitter-base junction diode of a transistor.

Symbol: R_e

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Emitter Resistance

Small-Signal Input Resistance b/w Base-Emitter

Small-Signal input resistance b/w base-emitter is the opposition offered to the current passing through the base-emitter region.

Symbol: R_sbe

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Small-Signal Input Resistance b/w Base-Emitter

Finite Output Resistance

The finite output resistance is the measure of the opposition to current flow, both static and dynamic, into the load network being connected that is internal to the electrical source.

Symbol: R_fo

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Finite Output Resistance

Other formulas in IC Amplifiers category

Go Finite Output Resistance of IC Amplifier

R fo = \frac{ΔV o}{ΔI o}

Go Output Current

I out = I ref \cdot (\frac{I t2}{I t1})

Go Intrinsic Gain of IC Amplifier

G i = 2 \cdot \frac{V e}{V ov}

Go Reference Current of IC Amplifier

I ref = I o \cdot (\frac{WL}{WL 1})

How to Evaluate Output Resistance of Widlar Current Source?

Output Resistance of Widlar Current Source evaluator uses Output Resistance of Widlar Current Source = (1+Transconductance)*((1/Emitter Resistance)+(1/Small-Signal Input Resistance b/w Base-Emitter))*Finite Output Resistance to evaluate the Output Resistance of Widlar Current Source, The output resistance of Widlar Current Source formula is defined as the opposition offered to the flow of the current in the Widlar Current Source. Output Resistance of Widlar Current Source is denoted by R_wcs symbol.

How to evaluate Output Resistance of Widlar Current Source using this online evaluator? To use this online evaluator for Output Resistance of Widlar Current Source, enter Transconductance (g_m), Emitter Resistance (R_e), Small-Signal Input Resistance b/w Base-Emitter (R_sbe) & Finite Output Resistance (R_fo) and hit the calculate button.

FAQs on Output Resistance of Widlar Current Source

What is the formula to find Output Resistance of Widlar Current Source?

The formula of Output Resistance of Widlar Current Source is expressed as Output Resistance of Widlar Current Source = (1+Transconductance)*((1/Emitter Resistance)+(1/Small-Signal Input Resistance b/w Base-Emitter))*Finite Output Resistance. Here is an example- 2.1E-6 = (1+0.25)*((1/909)+(1/20000))*1450.

How to calculate Output Resistance of Widlar Current Source?

With Transconductance (g_m), Emitter Resistance (R_e), Small-Signal Input Resistance b/w Base-Emitter (R_sbe) & Finite Output Resistance (R_fo) we can find Output Resistance of Widlar Current Source using the formula - Output Resistance of Widlar Current Source = (1+Transconductance)*((1/Emitter Resistance)+(1/Small-Signal Input Resistance b/w Base-Emitter))*Finite Output Resistance.

Can the Output Resistance of Widlar Current Source be negative?

No, the Output Resistance of Widlar Current Source, measured in Electric Resistance cannot be negative.

Which unit is used to measure Output Resistance of Widlar Current Source?

Output Resistance of Widlar Current Source is usually measured using the Kilohm[kΩ] for Electric Resistance. Ohm[kΩ], Megohm[kΩ], Microhm[kΩ] are the few other units in which Output Resistance of Widlar Current Source can be measured.

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Output Resistance of Widlar Current Source Formula

Output Resistance of Widlar Current Source Example

Output Resistance of Widlar Current Source Solution

Output Resistance of Widlar Current Source Formula Elements

Other formulas in IC Amplifiers category

How to Evaluate Output Resistance of Widlar Current Source?

FAQs on Output Resistance of Widlar Current Source

Variable Name