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Emitter Base Charging Time Formula

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Emitter charging time is defined as drift in the motion of the charged particles induced by a field when you forward bias the emitter junction you get a large diffusion. Check FAQs
τe=τec-(τscr+τc+τb)
τe - Emitter Charging Time?τec - Emitter Collector Delay Time?τscr - Base Collector Delay Time?τc - Collector Charging Time?τb - Base Transit Time?

Emitter Base Charging Time Example

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With units
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Here is how the Emitter Base Charging Time equation looks like with Values.

Here is how the Emitter Base Charging Time equation looks like with Units.

Here is how the Emitter Base Charging Time equation looks like.

5273Edit=5295Edit-(5.5Edit+6.4Edit+10.1Edit)
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Emitter Base Charging Time Solution

Follow our step by step solution on how to calculate Emitter Base Charging Time?

FIRST Step Consider the formula
τe=τec-(τscr+τc+τb)
Next Step Substitute values of Variables
∴ τe=5295μs-(5.5μs+6.4μs+10.1μs)
Next Step Convert Units
∴ τe=0.0053s-(5.5E-6s+6.4E-6s+1E-5s)
Next Step Prepare to Evaluate
∴ τe=0.0053-(5.5E-6+6.4E-6+1E-5)
Next Step Evaluate
∴τe=0.005273s
LAST Step Convert to Output's Unit
∴τe=5273μs

Emitter Base Charging Time Formula Elements

Variables
Emitter Charging Time
Emitter charging time is defined as drift in the motion of the charged particles induced by a field when you forward bias the emitter junction you get a large diffusion.
Symbol: τe
Measurement: TimeUnit: μs
Note: Value should be greater than 0.
Formulas to find Emitter Charging TimeOpen Variable
Emitter Collector Delay Time
Emitter collector delay time is defined as the transit time across the base-collector depletion region or space.
Symbol: τec
Measurement: TimeUnit: μs
Note: Value should be greater than 0.
Formulas to find Emitter Collector Delay TimeOpen Variable
Base Collector Delay Time
Base Collector Delay Time refers to the additional time taken by the signal to propagate through space charged region of base collector junction.
Symbol: τscr
Measurement: TimeUnit: μs
Note: Value should be greater than 0.
Formulas to find Base Collector Delay TimeOpen Variable
Collector Charging Time
Collector charging time refers to the time taken for the minority carriers in the base region of a BJT to be swept out of the collector region after the transistor is turned off.
Symbol: τc
Measurement: TimeUnit: μs
Note: Value should be greater than 0.
Formulas to find Collector Charging TimeOpen Variable
Base Transit Time
Base transit time is the average time the minority carriers need to traverse the quasi-neutral region in the base.
Symbol: τb
Measurement: TimeUnit: μs
Note: Value should be greater than 0.
Formulas to find Base Transit TimeOpen Variable

Other formulas in BJT Microwave Devices category

​Go Cut-off Frequency of Microwave
fco=12⋅π⋅τec
​Go Base Transit Time
τb=τec-(τscr+τc+τe)
​Go Base Collector Delay Time
τscr=τec-(τc+τb+τe)
​Go Collector Charging Time
τc=τec-(τscr+τb+τe)

How to Evaluate Emitter Base Charging Time?

Emitter Base Charging Time evaluator uses Emitter Charging Time = Emitter Collector Delay Time-(Base Collector Delay Time+Collector Charging Time+Base Transit Time) to evaluate the Emitter Charging Time, Emitter Base Charging Time is the time required for the charge carriers to travel across the base region and reach the collector in a bipolar junction transistor (BJT) during the switching process. It is also known as the minority carrier storage time or base transit time. Emitter Charging Time is denoted by τe symbol.

How to evaluate Emitter Base Charging Time using this online evaluator? To use this online evaluator for Emitter Base Charging Time, enter Emitter Collector Delay Time (τec), Base Collector Delay Time (τscr), Collector Charging Time (τc) & Base Transit Time (τb) and hit the calculate button.

FAQs on Emitter Base Charging Time

What is the formula to find Emitter Base Charging Time?
The formula of Emitter Base Charging Time is expressed as Emitter Charging Time = Emitter Collector Delay Time-(Base Collector Delay Time+Collector Charging Time+Base Transit Time). Here is an example- 5.3E+9 = 0.005295-(5.5E-06+6.4E-06+1.01E-05).
How to calculate Emitter Base Charging Time?
With Emitter Collector Delay Time (τec), Base Collector Delay Time (τscr), Collector Charging Time (τc) & Base Transit Time (τb) we can find Emitter Base Charging Time using the formula - Emitter Charging Time = Emitter Collector Delay Time-(Base Collector Delay Time+Collector Charging Time+Base Transit Time).
Can the Emitter Base Charging Time be negative?
No, the Emitter Base Charging Time, measured in Time cannot be negative.
Which unit is used to measure Emitter Base Charging Time?
Emitter Base Charging Time is usually measured using the Microsecond[μs] for Time. Second[μs], Millisecond[μs], Nanosecond[μs] are the few other units in which Emitter Base Charging Time can be measured.
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