Total Transit Time Calculator

✖Base transit time is the average time the minority carriers need to traverse the quasi-neutral region in the base.ⓘ Base Transit Time [τ_b]			+10% -10%
✖The Collector Depletion Region Transit Time in a BJT refers to the duration it takes for charge carriers to travel across the collector-emitter region of the transistor.ⓘ Collector Depletion Region [τ_ttc]			+10% -10%

✖Total Transit Time in a BJT is the duration for charge carriers to traverse the transistor, covering base and collector-emitter region transit times.ⓘ Total Transit Time [τ_tt]

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Formula

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Total Transit Time

Formula

`"τ"_{"tt"} = "τ"_{"b"}+"τ"_{"ttc"}`

Example

`"19μs"="10.1μs"+"8.9μs"`

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Total Transit Time Solution

STEP 0: Pre-Calculation Summary

Formula Used

Total Transit Time = Base Transit Time+Collector Depletion Region
τ_tt = τ_b+τ_ttc
This formula uses 3 Variables

Variables Used

Total Transit Time - (Measured in Second) - Total Transit Time in a BJT is the duration for charge carriers to traverse the transistor, covering base and collector-emitter region transit times.
Base Transit Time - (Measured in Second) - Base transit time is the average time the minority carriers need to traverse the quasi-neutral region in the base.
Collector Depletion Region - (Measured in Second) - The Collector Depletion Region Transit Time in a BJT refers to the duration it takes for charge carriers to travel across the collector-emitter region of the transistor.

STEP 1: Convert Input(s) to Base Unit

Base Transit Time: 10.1 Microsecond --> 1.01E-05 Second (Check conversion here)
Collector Depletion Region: 8.9 Microsecond --> 8.9E-06 Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

τ_tt = τ_b+τ_ttc --> 1.01E-05+8.9E-06

Evaluating ... ...

τ_tt = 1.9E-05

STEP 3: Convert Result to Output's Unit

1.9E-05 Second -->19 Microsecond (Check conversion here)

FINAL ANSWER

19 Microsecond <-- Total Transit Time

(Calculation completed in 00.004 seconds)

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Credits

Created by Gowthaman N

Vellore Institute of Technology (VIT University), Chennai

Gowthaman N has created this Calculator and 25+ more calculators!

Verified by Ritwik Tripathi

Vellore Institute of Technology (VIT Vellore), Vellore

Ritwik Tripathi has verified this Calculator and 100+ more calculators!

< 15 BJT Microwave Devices Calculators

Maximum Frequency of Oscillations

Go Maximum Frequency of Oscillations = sqrt(Common Emitter Short Circuit Gain Frequency/(8*pi*Base Resistance*Collector Base Capacitance))

Emitter Base Charging Time

Go Emitter Charging Time = Emitter Collector Delay Time-(Base Collector Delay Time+Collector Charging Time+Base Transit Time)

Base Collector Delay Time

Go Base Collector Delay Time = Emitter Collector Delay Time-(Collector Charging Time+Base Transit Time+Emitter Charging Time)

Collector Charging Time

Go Collector Charging Time = Emitter Collector Delay Time-(Base Collector Delay Time+Base Transit Time+Emitter Charging Time)

Base Transit Time

Go Base Transit Time = Emitter Collector Delay Time-(Base Collector Delay Time+Collector Charging Time+Emitter Charging Time)

Emitter to Collector Delay Time

Go Emitter Collector Delay Time = Base Collector Delay Time+Collector Charging Time+Base Transit Time+Emitter Charging Time

Collector Base Capacitance

Go Collector Base Capacitance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Base Resistance)

Base Resistance

Go Base Resistance = Cut-off Frequency in BJT/(8*pi*Maximum Frequency of Oscillations^2*Collector Base Capacitance)

Avalanche Multiplication Factor

Go Avalanche Multiplication Factor = 1/(1-(Applied Voltage/Avalanche Breakdown Voltage)^Doping Numerical Factor)

Saturation Drift Velocity

Go Saturated Drift Velocity in BJT = Emitter to Collector Distance/Average Time to Traverse Emitter to Collector

Emitter to Collector Distance

Go Emitter to Collector Distance = Maximum Applied Voltage in BJT/Maximum Electric Field in BJT

Total Charging Time

Go Total Charging Time = Emitter Charging Time+Collector Charging Time

Cut-off Frequency of Microwave

Go Cut-off Frequency in BJT = 1/(2*pi*Emitter Collector Delay Time)

Total Transit Time

Go Total Transit Time = Base Transit Time+Collector Depletion Region

Hole Current of Emitter

Go Hole Current of Emitter = Base Current+Collector Current

Total Transit Time Formula

Total Transit Time = Base Transit Time+Collector Depletion Region
τ_tt = τ_b+τ_ttc

How does the Base Transit Time in a BJT impact the overall transistor performance?

The Base Transit Time is crucial as it represents the time for charge carriers to traverse the base region. A shorter leads to faster switching, critical in high-frequency applications. It affects the overall response time of the BJT, influencing the efficiency and speed of electronic circuits where rapid transitions are essential. Minimizing enhances the transistor's performance in applications requiring quick switching times.

How to Calculate Total Transit Time?

Total Transit Time calculator uses Total Transit Time = Base Transit Time+Collector Depletion Region to calculate the Total Transit Time, The Total Transit Time in a bipolar junction transistor refers to the overall duration it takes for charge carriers to travel through the entire transistor, encompassing both the base transit time and the collector-emitter region transit time. Total Transit Time is denoted by τ_tt symbol.

How to calculate Total Transit Time using this online calculator? To use this online calculator for Total Transit Time, enter Base Transit Time (τ_b) & Collector Depletion Region (τ_ttc) and hit the calculate button. Here is how the Total Transit Time calculation can be explained with given input values -> 1.9E+7 = 1.01E-05+8.9E-06.

FAQ

What is Total Transit Time?

The Total Transit Time in a bipolar junction transistor refers to the overall duration it takes for charge carriers to travel through the entire transistor, encompassing both the base transit time and the collector-emitter region transit time and is represented as τ_tt = τ_b+τ_ttc or Total Transit Time = Base Transit Time+Collector Depletion Region. Base transit time is the average time the minority carriers need to traverse the quasi-neutral region in the base & The Collector Depletion Region Transit Time in a BJT refers to the duration it takes for charge carriers to travel across the collector-emitter region of the transistor.

How to calculate Total Transit Time?

The Total Transit Time in a bipolar junction transistor refers to the overall duration it takes for charge carriers to travel through the entire transistor, encompassing both the base transit time and the collector-emitter region transit time is calculated using Total Transit Time = Base Transit Time+Collector Depletion Region. To calculate Total Transit Time, you need Base Transit Time (τ_b) & Collector Depletion Region (τ_ttc). With our tool, you need to enter the respective value for Base Transit Time & Collector Depletion Region and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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