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Input Capacitance in High-Frequency Gain of CE Amplifier Formula

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Input capacitance is the capacitance value of the voltage amplifier. Check FAQs

C i = C cb + C be \cdot (1 + (g m \cdot R L))

C_i - Input Capacitance?C_cb - Collector Base Junction Capacitance?C_be - Base Emitter Capacitance?g_m - Transconductance?R_L - Load Resistance?

Input Capacitance in High-Frequency Gain of CE Amplifier Example

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Here is how the Input Capacitance in High-Frequency Gain of CE Amplifier equation looks like with Values.

Here is how the Input Capacitance in High-Frequency Gain of CE Amplifier equation looks like with Units.

Here is how the Input Capacitance in High-Frequency Gain of CE Amplifier equation looks like.

520.104 = 300 + 27 \cdot (1 + (4.8 \cdot 1.49))

520.104μF = 300μF + 27μF \cdot (1 + (4.8mS \cdot 1.49kΩ))

520.104 = 300 + 27 \cdot (1 + (4.8 \cdot 1.49))

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Input Capacitance in High-Frequency Gain of CE Amplifier Solution

Follow our step by step solution on how to calculate Input Capacitance in High-Frequency Gain of CE Amplifier?

FIRST Step Consider the formula

C i = C cb + C be \cdot (1 + (g m \cdot R L))

Next Step Substitute values of Variables

∴

C i = 300μF + 27μF \cdot (1 + (4.8mS \cdot 1.49kΩ))

Next Step Convert Units

∴

C i = 0.0003F + 2.7E-5F \cdot (1 + (0.0048S \cdot 1490Ω))

Next Step Prepare to Evaluate

∴

C i = 0.0003 + 2.7E-5 \cdot (1 + (0.0048 \cdot 1490))

Next Step Evaluate

∴

C i = 0.000520104F

LAST Step Convert to Output's Unit

∴

C i = 520.104μF

Input Capacitance in High-Frequency Gain of CE Amplifier Formula Elements

Variables

Input Capacitance

Input capacitance is the capacitance value of the voltage amplifier.

Symbol: C_i

Measurement: CapacitanceUnit: μF

Note: Value should be greater than 0.

Formulas to find Input Capacitance

Collector Base Junction Capacitance

Collector Base Junction Capacitance in active mode is reverse biased and is the capacitance between collector and base.

Symbol: C_cb

Measurement: CapacitanceUnit: μF

Note: Value should be greater than 0.

Formulas to find Collector Base Junction Capacitance

Base Emitter Capacitance

Base Emitter Capacitance is the capacitance of the junction that is forward-biased and is represented by a diode.

Symbol: C_be

Measurement: CapacitanceUnit: μF

Note: Value should be greater than 0.

Formulas to find Base Emitter Capacitance

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

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

Other formulas in Response of CE 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 Capacitance in High-Frequency Gain of CE Amplifier?

Input Capacitance in High-Frequency Gain of CE Amplifier evaluator uses Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance)) to evaluate the Input Capacitance, The Input capacitance in high-frequency gain of CE amplifier formula is defined as equal to Cbe. (Well, in practice there is small parasitic capacitance between collector and emitter) Common collector circuit has collector end grounded (Vcc is ground for AC), so input capacitance equals base-collector capacitance provided load has no capacitance of its own. Input Capacitance is denoted by C_i symbol.

How to evaluate Input Capacitance in High-Frequency Gain of CE Amplifier using this online evaluator? To use this online evaluator for Input Capacitance in High-Frequency Gain of CE Amplifier, enter Collector Base Junction Capacitance (C_cb), Base Emitter Capacitance (C_be), Transconductance (g_m) & Load Resistance (R_L) and hit the calculate button.

FAQs on Input Capacitance in High-Frequency Gain of CE Amplifier

What is the formula to find Input Capacitance in High-Frequency Gain of CE Amplifier?

The formula of Input Capacitance in High-Frequency Gain of CE Amplifier is expressed as Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance)). Here is an example- 5.2E+8 = 0.0003+2.7E-05*(1+(0.0048*1490)).

How to calculate Input Capacitance in High-Frequency Gain of CE Amplifier?

With Collector Base Junction Capacitance (C_cb), Base Emitter Capacitance (C_be), Transconductance (g_m) & Load Resistance (R_L) we can find Input Capacitance in High-Frequency Gain of CE Amplifier using the formula - Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance)).

Can the Input Capacitance in High-Frequency Gain of CE Amplifier be negative?

No, the Input Capacitance in High-Frequency Gain of CE Amplifier, measured in Capacitance cannot be negative.

Which unit is used to measure Input Capacitance in High-Frequency Gain of CE Amplifier?

Input Capacitance in High-Frequency Gain of CE Amplifier is usually measured using the Microfarad[μF] for Capacitance. Farad[μF], Kilofarad[μF], Millifarad[μF] are the few other units in which Input Capacitance in High-Frequency Gain of CE Amplifier can be measured.

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Input Capacitance in High-Frequency Gain of CE Amplifier Formula

Input Capacitance in High-Frequency Gain of CE Amplifier Example

Input Capacitance in High-Frequency Gain of CE Amplifier Solution

Input Capacitance in High-Frequency Gain of CE Amplifier Formula Elements

Other formulas in Response of CE Amplifier category

How to Evaluate Input Capacitance in High-Frequency Gain of CE Amplifier?

FAQs on Input Capacitance in High-Frequency Gain of CE Amplifier

Variable Name