Open Circuit Time Constant in High Frequency Response of CG Amplifier Calculator

✖Gate to Source Capacitance is defined as the capacitance that is observed between the gate and Source of the Junction of MOSFET.ⓘ Gate to Source Capacitance [C_gs]			+10% -10%
✖Signal Resistance is the resistance which is fed with the signal voltage source vs to an Amplifier.ⓘ Signal Resistance [R_sig]			+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%
✖Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential.ⓘ Capacitance [C_t]			+10% -10%
✖Gate to Drain Capacitance is defined as the capacitance that is observed between the gate and drain of the Junction of MOSFET.ⓘ Gate to Drain Capacitance [C_gd]			+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%

✖Open circuit Time Constant is an approximate analysis technique used in electronic circuit design to determine the corner frequency of complex circuits.ⓘ Open Circuit Time Constant in High Frequency Response of CG Amplifier [T_oc]

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Open Circuit Time Constant in High Frequency Response of CG Amplifier Solution

STEP 0: Pre-Calculation Summary

Formula Used

Open Circuit Time Constant = Gate to Source Capacitance*(1/Signal Resistance+Transconductance)+(Capacitance+Gate to Drain Capacitance)*Load Resistance
T_oc = C_gs*(1/R_sig+g_m)+(C_t+C_gd)*R_L
This formula uses 7 Variables

Variables Used

Open Circuit Time Constant - (Measured in Second) - Open circuit Time Constant is an approximate analysis technique used in electronic circuit design to determine the corner frequency of complex circuits.
Gate to Source Capacitance - (Measured in Farad) - Gate to Source Capacitance is defined as the capacitance that is observed between the gate and Source of the Junction of MOSFET.
Signal Resistance - (Measured in Ohm) - Signal Resistance is the resistance which is fed with the signal voltage source vs to an Amplifier.
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.
Capacitance - (Measured in Farad) - Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential.
Gate to Drain Capacitance - (Measured in Farad) - Gate to Drain Capacitance is defined as the capacitance that is observed between the gate and drain of the Junction of MOSFET.
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

Gate to Source Capacitance: 2.6 Microfarad --> 2.6E-06 Farad (Check conversion here)
Signal Resistance: 1.25 Kilohm --> 1250 Ohm (Check conversion here)
Transconductance: 4.8 Millisiemens --> 0.0048 Siemens (Check conversion here)
Capacitance: 2.889 Microfarad --> 2.889E-06 Farad (Check conversion here)
Gate to Drain Capacitance: 1.345 Microfarad --> 1.345E-06 Farad (Check conversion here)
Load Resistance: 1.49 Kilohm --> 1490 Ohm (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

T_oc = C_gs*(1/R_sig+g_m)+(C_t+C_gd)*R_L --> 2.6E-06*(1/1250+0.0048)+(2.889E-06+1.345E-06)*1490

Evaluating ... ...

T_oc = 0.00630867456

STEP 3: Convert Result to Output's Unit

0.00630867456 Second --> No Conversion Required

FINAL ANSWER

0.00630867456 ≈ 0.006309 Second <-- Open Circuit Time Constant

(Calculation completed in 00.013 seconds)

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

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National Institute Of Technology (NIT), Hamirpur

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< Response of CG Amplifier Calculators

Open Circuit Time Constant in High Frequency Response of CG Amplifier

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

Input Resistance of CG Amplifier

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

Second Pole-Frequency of CG Amplifier

LaTeX Go Second Pole Frequency = 1/(2*pi*Load Resistance*(Gate to Drain Capacitance+Capacitance))

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

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

< Common Stage Amplifiers Calculators

Effective High Frequency Time Constant of CE Amplifier

LaTeX 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

LaTeX 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))))

Collector Base Junction Resistance of CE Amplifier

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

Amplifier Bandwidth in Discrete-Circuit Amplifier

LaTeX Go Amplifier Bandwidth = High Frequency-Low Frequency

Open Circuit Time Constant in High Frequency Response of CG Amplifier Formula

LaTeX Go

Open Circuit Time Constant = Gate to Source Capacitance*(1/Signal Resistance+Transconductance)+(Capacitance+Gate to Drain Capacitance)*Load Resistance
T_oc = C_gs*(1/R_sig+g_m)+(C_t+C_gd)*R_L

What is CG amplifier?

In electronics, a common-gate amplifier is one of three basic single-stage field-effect transistor (FET) amplifier topologies, typically used as a current buffer or voltage amplifier. In this circuit the source terminal of the transistor serves as the input, the drain is the output and the gate is connected to the ground, or "common," hence its name. The analogous bipolar junction transistor circuit is the common-base amplifier.

How to Calculate Open Circuit Time Constant in High Frequency Response of CG Amplifier?

Open Circuit Time Constant in High Frequency Response of CG Amplifier calculator uses Open Circuit Time Constant = Gate to Source Capacitance*(1/Signal Resistance+Transconductance)+(Capacitance+Gate to Drain Capacitance)*Load Resistance to calculate the Open Circuit Time Constant, The Open circuit time constant in high frequency response of CG amplifier formula is defined as a method is an approximate analysis technique used in electronic circuit design to determine the corner frequency of complex circuits. It is a special case of zero-value time constant (ZVT) method technique when reactive elements consist of only capacitors. Open Circuit Time Constant is denoted by T_oc symbol.

How to calculate Open Circuit Time Constant in High Frequency Response of CG Amplifier using this online calculator? To use this online calculator for Open Circuit Time Constant in High Frequency Response of CG Amplifier, enter Gate to Source Capacitance (C_gs), Signal Resistance (R_sig), Transconductance (g_m), Capacitance (C_t), Gate to Drain Capacitance (C_gd) & Load Resistance (R_L) and hit the calculate button. Here is how the Open Circuit Time Constant in High Frequency Response of CG Amplifier calculation can be explained with given input values -> 0.006309 = 2.6E-06*(1/1250+0.0048)+(2.889E-06+1.345E-06)*1490.

FAQ

What is Open Circuit Time Constant in High Frequency Response of CG Amplifier?

The Open circuit time constant in high frequency response of CG amplifier formula is defined as a method is an approximate analysis technique used in electronic circuit design to determine the corner frequency of complex circuits. It is a special case of zero-value time constant (ZVT) method technique when reactive elements consist of only capacitors and is represented as T_oc = C_gs*(1/R_sig+g_m)+(C_t+C_gd)*R_L or Open Circuit Time Constant = Gate to Source Capacitance*(1/Signal Resistance+Transconductance)+(Capacitance+Gate to Drain Capacitance)*Load Resistance. Gate to Source Capacitance is defined as the capacitance that is observed between the gate and Source of the Junction of MOSFET, Signal Resistance is the resistance which is fed with the signal voltage source vs to an Amplifier, 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, Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential, Gate to Drain Capacitance is defined as the capacitance that is observed between the gate and drain of the Junction of MOSFET & Load resistance is the cumulative resistance of a circuit, as seen by the voltage, current, or power source driving that circuit.

How to calculate Open Circuit Time Constant in High Frequency Response of CG Amplifier?

The Open circuit time constant in high frequency response of CG amplifier formula is defined as a method is an approximate analysis technique used in electronic circuit design to determine the corner frequency of complex circuits. It is a special case of zero-value time constant (ZVT) method technique when reactive elements consist of only capacitors is calculated using Open Circuit Time Constant = Gate to Source Capacitance*(1/Signal Resistance+Transconductance)+(Capacitance+Gate to Drain Capacitance)*Load Resistance. To calculate Open Circuit Time Constant in High Frequency Response of CG Amplifier, you need Gate to Source Capacitance (C_gs), Signal Resistance (R_sig), Transconductance (g_m), Capacitance (C_t), Gate to Drain Capacitance (C_gd) & Load Resistance (R_L). With our tool, you need to enter the respective value for Gate to Source Capacitance, Signal Resistance, Transconductance, Capacitance, Gate to Drain Capacitance & Load 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 Open Circuit Time Constant?

In this formula, Open Circuit Time Constant uses Gate to Source Capacitance, Signal Resistance, Transconductance, Capacitance, Gate to Drain Capacitance & Load Resistance. We can use 2 other way(s) to calculate the same, which is/are as follows -

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

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