FormulaDen.com

Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health

Input Resistance of CG Amplifier Formula

GoResistance between Gate and Drain in Open Circuit Time Constants Method of CS Amplifier Formula

GoResistance between Gate and Source of CG Amplifier Formula

Fx Copy

LaTeX Copy

Resistance is a measure of the opposition to current flow in an electrical circuit. Its S.I unit is ohm. Check FAQs

R t = \frac{R in + R L}{1 + (g m \cdot R in)}

R_t - Resistance?R_in - Finite Input Resistance?R_L - Load Resistance?g_m - Transconductance?

Input Resistance of CG Amplifier Example

With values

With units

Only example

Here is how the Input Resistance of CG Amplifier equation looks like with Values.

Here is how the Input Resistance of CG Amplifier equation looks like with Units.

Here is how the Input Resistance of CG Amplifier equation looks like.

0.4785 = \frac{0.78 + 1.49}{1 + (4.8 \cdot 0.78)}

0.4785kΩ = \frac{0.78kΩ + 1.49kΩ}{1 + (4.8mS \cdot 0.78kΩ)}

0.4785 = \frac{0.78 + 1.49}{1 + (4.8 \cdot 0.78)}

Tip: Use pencil ( Pencil

) icon above to edit Input Values and Units.

Calculate

Recalculate

Solution

Copy

Reset

You are here -

Home » Category

Engineering » Category

Electronics » Category

Amplifiers » fx Input Resistance of CG Amplifier

Input Resistance of CG Amplifier Solution

Follow our step by step solution on how to calculate Input Resistance of CG Amplifier?

FIRST Step Consider the formula

R t = \frac{R in + R L}{1 + (g m \cdot R in)}

Next Step Substitute values of Variables

∴

R t = \frac{0.78kΩ + 1.49kΩ}{1 + (4.8mS \cdot 0.78kΩ)}

Next Step Convert Units

∴

R t = \frac{780Ω + 1490Ω}{1 + (0.0048S \cdot 780Ω)}

Next Step Prepare to Evaluate

∴

R t = \frac{780 + 1490}{1 + (0.0048 \cdot 780)}

Next Step Evaluate

∴

R t = 478.49915682968Ω

Next Step Convert to Output's Unit

∴

R t = 0.47849915682968kΩ

LAST Step Rounding Answer

∴

R t = 0.4785kΩ

Input Resistance of CG Amplifier Formula Elements

Variables

Resistance

Resistance is a measure of the opposition to current flow in an electrical circuit. Its S.I unit is ohm.

Symbol: R_t

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Resistance

Finite Input Resistance

Finite input resistance is the finite resistance seen by the current source or voltage source which drives the circuit.

Symbol: R_in

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Finite Input Resistance

Load Resistance

Load resistance is the cumulative resistance of a circuit, as seen by the voltage, current, or power source driving that circuit.

Symbol: R_L

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Load Resistance

Transconductance

Transconductance is the ratio of the change in current at the output terminal to the change in the voltage at the input terminal of an active device.

Symbol: g_m

Measurement: Electric ConductanceUnit: mS

Note: Value should be greater than 0.

Formulas to find Transconductance

Other Formulas to find Resistance

Go Resistance between Gate and Drain in Open Circuit Time Constants Method of CS Amplifier

R t = \frac{v x}{i x}

Go Resistance between Gate and Source of CG Amplifier

R t = \frac{1}{\frac{1}{R in} + \frac{1}{R sig}}

Other formulas in Response of CG Amplifier category

Go Amplifier Bandwidth in Discrete-Circuit Amplifier

BW = f h - f L

Go Collector Base Junction Resistance of CE Amplifier

R c = R sig \cdot (1 + g m \cdot R L) + R L

Go Effective High Frequency Time Constant of CE Amplifier

𝜏 H = C be \cdot R sig + (C cb \cdot (R sig \cdot (1 + g m \cdot R L) + R L)) + (C t \cdot R L)

Go High-Frequency Band given Complex Frequency Variable

A m = \sqrt{\frac{(1 + (\frac{f 3dB}{f t})) \cdot (1 + (\frac{f 3dB}{f o}))}{(1 + (\frac{f 3dB}{f p})) \cdot (1 + (\frac{f 3dB}{f p2}))}}

How to Evaluate Input Resistance of CG Amplifier?

Input Resistance of CG Amplifier evaluator uses Resistance = (Finite Input Resistance+Load Resistance)/(1+(Transconductance*Finite Input Resistance)) to evaluate the Resistance, The input resistance of CG amplifier formula is defined as the resistance seen by the current source or voltage source which drives the circuit. Resistance is denoted by R_t symbol.

How to evaluate Input Resistance of CG Amplifier using this online evaluator? To use this online evaluator for Input Resistance of CG Amplifier, enter Finite Input Resistance (R_in), Load Resistance (R_L) & Transconductance (g_m) and hit the calculate button.

FAQs on Input Resistance of CG Amplifier

What is the formula to find Input Resistance of CG Amplifier?

The formula of Input Resistance of CG Amplifier is expressed as Resistance = (Finite Input Resistance+Load Resistance)/(1+(Transconductance*Finite Input Resistance)). Here is an example- 0.00048 = (780+1490)/(1+(0.0048*780)).

How to calculate Input Resistance of CG Amplifier?

With Finite Input Resistance (R_in), Load Resistance (R_L) & Transconductance (g_m) we can find Input Resistance of CG Amplifier using the formula - Resistance = (Finite Input Resistance+Load Resistance)/(1+(Transconductance*Finite Input Resistance)).

What are the other ways to Calculate Resistance?

Here are the different ways to Calculate Resistance-

Resistance=Test Voltage/Test Current
Resistance=1/(1/Finite Input Resistance+1/Signal Resistance)

Can the Input Resistance of CG Amplifier be negative?

No, the Input Resistance of CG Amplifier, measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Resistance of CG Amplifier?

Input Resistance of CG Amplifier is usually measured using the Kilohm[kΩ] for Electric Resistance. Ohm[kΩ], Megohm[kΩ], Microhm[kΩ] are the few other units in which Input Resistance of CG Amplifier can be measured.

Let Others Know

✖

Facebook

Twitter

Copied!

Input Resistance of CG Amplifier Formula

​GoResistance between Gate and Drain in Open Circuit Time Constants Method of CS Amplifier Formula

​GoResistance between Gate and Source of CG Amplifier Formula

Input Resistance of CG Amplifier Example

Input Resistance of CG Amplifier Solution

Input Resistance of CG Amplifier Formula Elements

Other Formulas to find Resistance

Other formulas in Response of CG Amplifier category

How to Evaluate Input Resistance of CG Amplifier?

FAQs on Input Resistance of CG Amplifier

Variable Name

GoResistance between Gate and Drain in Open Circuit Time Constants Method of CS Amplifier Formula

GoResistance between Gate and Source of CG Amplifier Formula