Input Capacitance in High-Frequency Gain of CE Amplifier Calculator

✖Collector Base Junction Capacitance in active mode is reverse biased and is the capacitance between collector and base.ⓘ Collector Base Junction Capacitance [C_cb]			+10% -10%
✖Base Emitter Capacitance is the capacitance of the junction that is forward-biased and is represented by a diode.ⓘ Base Emitter Capacitance [C_be]			+10% -10%
✖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.ⓘ Transconductance [g_m]			+10% -10%
✖Load resistance is the cumulative resistance of a circuit, as seen by the voltage, current, or power source driving that circuit.ⓘ Load Resistance [R_L]			+10% -10%

✖Input capacitance is the capacitance value of the voltage amplifier.ⓘ Input Capacitance in High-Frequency Gain of CE Amplifier [C_i]

⎘ Copy

👎

Formula

✖

Input Capacitance in High-Frequency Gain of CE Amplifier

Formula

`"C"_{"i"} = "C"_{"cb"}+"C"_{"be"}*(1+("g"_{"m"}*"R"_{"L"}))`

Example

`"520.104μF"="300μF"+"27μF"*(1+("4.8mS"*"1.49kΩ"))`

Calculator

LaTeX

Reset

👍

Download High Frequency Response Amplifiers Formula PDF

Input Capacitance in High-Frequency Gain of CE Amplifier Solution

STEP 0: Pre-Calculation Summary

Formula Used

Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance))
C_i = C_cb+C_be*(1+(g_m*R_L))
This formula uses 5 Variables

Variables Used

Input Capacitance - (Measured in Farad) - Input capacitance is the capacitance value of the voltage amplifier.
Collector Base Junction Capacitance - (Measured in Farad) - Collector Base Junction Capacitance in active mode is reverse biased and is the capacitance between collector and base.
Base Emitter Capacitance - (Measured in Farad) - Base Emitter Capacitance is the capacitance of the junction that is forward-biased and is represented by a diode.
Transconductance - (Measured in Siemens) - 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.
Load Resistance - (Measured in Ohm) - Load resistance is the cumulative resistance of a circuit, as seen by the voltage, current, or power source driving that circuit.

STEP 1: Convert Input(s) to Base Unit

Collector Base Junction Capacitance: 300 Microfarad --> 0.0003 Farad (Check conversion here)
Base Emitter Capacitance: 27 Microfarad --> 2.7E-05 Farad (Check conversion here)
Transconductance: 4.8 Millisiemens --> 0.0048 Siemens (Check conversion here)
Load Resistance: 1.49 Kilohm --> 1490 Ohm (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

C_i = C_cb+C_be*(1+(g_m*R_L)) --> 0.0003+2.7E-05*(1+(0.0048*1490))

Evaluating ... ...

C_i = 0.000520104

STEP 3: Convert Result to Output's Unit

0.000520104 Farad -->520.104 Microfarad (Check conversion here)

FINAL ANSWER

520.104 Microfarad <-- Input Capacitance

(Calculation completed in 00.004 seconds)

You are here -

Home » Engineering » Electronics » Amplifiers » High Frequency Response Amplifiers » Response of CE Amplifier » Input Capacitance in High-Frequency Gain of CE Amplifier

Credits

Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has created this Calculator and 600+ more calculators!

Verified by Urvi Rathod

Vishwakarma Government Engineering College (VGEC), Ahmedabad

Urvi Rathod has verified this Calculator and 1900+ more calculators!

< 8 Response of CE Amplifier Calculators

Effective High Frequency Time Constant of CE Amplifier

Go Effective High Frequency Time Constant = Base Emitter Capacitance*Signal Resistance+(Collector Base Junction Capacitance*(Signal Resistance*(1+Transconductance*Load Resistance)+Load Resistance))+(Capacitance*Load Resistance)

High-Frequency Band given Complex Frequency Variable

Go Amplifier Gain in Mid Band = sqrt(((1+(3 dB Frequency/Frequency))*(1+(3 dB Frequency/Frequency Observed)))/((1+(3 dB Frequency/Pole Frequency))*(1+(3 dB Frequency/Second Pole Frequency))))

Input Capacitance in High-Frequency Gain of CE Amplifier

Go Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance))

Collector Base Junction Resistance of CE Amplifier

Go Collector Resistance = Signal Resistance*(1+Transconductance*Load Resistance)+Load Resistance

High-Frequency Gain of CE Amplifier

Go High Frequency Response = Upper 3-dB Frequency/(2*pi)

Upper 3dB Frequency of CE Amplifier

Go Upper 3-dB Frequency = 2*pi*High Frequency Response

Amplifier Bandwidth in Discrete-Circuit Amplifier

Go Amplifier Bandwidth = High Frequency-Low Frequency

Mid Band Gain of CE Amplifier

Go Mid Band Gain = Output Voltage/Threshold Voltage

< 25 Common Stage Amplifiers Calculators

Effective High Frequency Time Constant of CE Amplifier

High-Frequency Band given Complex Frequency Variable

Go Amplifier Gain in Mid Band = sqrt(((1+(3 dB Frequency/Frequency))*(1+(3 dB Frequency/Frequency Observed)))/((1+(3 dB Frequency/Pole Frequency))*(1+(3 dB Frequency/Second Pole Frequency))))

Open Circuit Time Constant in High Frequency Response of CG Amplifier

Go Open Circuit Time Constant = Gate to Source Capacitance*(1/Signal Resistance+Transconductance)+(Capacitance+Gate to Drain Capacitance)*Load Resistance

Test Current in Open Circuit Time Constants Method of CS Amplifier

Go Test Current = Transconductance*Gate to Source Voltage+(Test Voltage+Gate to Source Voltage)/Load Resistance

Input Capacitance in High-Frequency Gain of CE Amplifier

Go Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance))

Input Resistance of CG Amplifier

Go Resistance = (Finite Input Resistance+Load Resistance)/(1+(Transconductance*Finite Input Resistance))

Load Resistance of CG Amplifier

Go Load Resistance = Resistance*(1+(Transconductance*Finite Input Resistance))-Finite Input Resistance

Collector Base Junction Resistance of CE Amplifier

Go Collector Resistance = Signal Resistance*(1+Transconductance*Load Resistance)+Load Resistance

Open Circuit Time Constant between Gate and Drain of Common Gate Amplifier

Go Open Circuit Time Constant = (Capacitance+Gate to Drain Capacitance)*Load Resistance

Load Resistance of CS Amplifier

Go Load Resistance = (Output Voltage/(Transconductance*Gate to Source Voltage))

High-Frequency Response given Input Capacitance

Go High Frequency Response = 1/(2*pi*Signal Resistance*Input Capacitance)

Output Voltage of CS Amplifier

Go Output Voltage = Transconductance*Gate to Source Voltage*Load Resistance

Equivalent Signal Resistance of CS Amplifier

Go Internal Small Signal Resistance = 1/((1/Signal Resistance+1/Output Resistance))

Frequency of Zero Transmission of CS Amplifier

Go Transmission Frequency = 1/(Bypass Capacitor*Signal Resistance)

Bypass Capacitance of CS Amplifier

Go Bypass Capacitor = 1/(Transmission Frequency*Signal Resistance)

Resistance between Gate and Source of CG Amplifier

Go Resistance = 1/(1/Finite Input Resistance+1/Signal Resistance)

High-Frequency Gain of CE Amplifier

Go High Frequency Response = Upper 3-dB Frequency/(2*pi)

Upper 3dB Frequency of CE Amplifier

Go Upper 3-dB Frequency = 2*pi*High Frequency Response

Drain Voltage through Method of Open-Circuit Time Constants to CS Amplifier

Go Drain Voltage = Test Voltage+Gate to Source Voltage

Source Voltage of CS Amplifier

Go Gate to Source Voltage = Drain Voltage-Test Voltage

Midband Gain of CS Amplifier

Go Mid Band Gain = Output Voltage/Small Signal Voltage

Amplifier Bandwidth in Discrete-Circuit Amplifier

Go Amplifier Bandwidth = High Frequency-Low Frequency

Mid Band Gain of CE Amplifier

Go Mid Band Gain = Output Voltage/Threshold Voltage

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

Go Resistance = Test Voltage/Test Current

Current Gain of CS Amplifier

Go Current Gain = Power Gain/Voltage Gain

Input Capacitance in High-Frequency Gain of CE Amplifier Formula

Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance))
C_i = C_cb+C_be*(1+(g_m*R_L))

What is meant by CE amplifier?

The common emitter amplifier is a three basic single-stage bipolar junction transistor and is used as a voltage amplifier. The input of this amplifier is taken from the base terminal, the output is collected from the collector terminal and the emitter terminal is common for both the terminals.

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

Input Capacitance in High-Frequency Gain of CE Amplifier calculator uses Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance)) to calculate 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 calculate Input Capacitance in High-Frequency Gain of CE Amplifier using this online calculator? To use this online calculator 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. Here is how the Input Capacitance in High-Frequency Gain of CE Amplifier calculation can be explained with given input values -> 5.2E+8 = 0.0003+2.7E-05*(1+(0.0048*1490)).

FAQ

What is Input Capacitance in High-Frequency Gain of CE Amplifier?

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 and is represented as C_i = C_cb+C_be*(1+(g_m*R_L)) or Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance)). Collector Base Junction Capacitance in active mode is reverse biased and is the capacitance between collector and base, Base Emitter Capacitance is the capacitance of the junction that is forward-biased and is represented by a diode, 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 & Load resistance is the cumulative resistance of a circuit, as seen by the voltage, current, or power source driving that circuit.

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

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 is calculated using Input Capacitance = Collector Base Junction Capacitance+Base Emitter Capacitance*(1+(Transconductance*Load Resistance)). To calculate Input Capacitance in High-Frequency Gain of CE Amplifier, you need Collector Base Junction Capacitance (C_cb), Base Emitter Capacitance (C_be), Transconductance (g_m) & Load Resistance (R_L). With our tool, you need to enter the respective value for Collector Base Junction Capacitance, Base Emitter Capacitance, Transconductance & Load Resistance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

Home

FREE PDFs

🔍 Search