Base Collector Delay Time Formula

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Base Collector Delay Time refers to the additional time taken by the signal to propagate through space charged region of base collector junction. Check FAQs
τscr=τec-(τc+τb+τe)
τscr - Base Collector Delay Time?τec - Emitter Collector Delay Time?τc - Collector Charging Time?τb - Base Transit Time?τe - Emitter Charging Time?

Base Collector Delay Time Example

With values
With units
Only example

Here is how the Base Collector Delay Time equation looks like with Values.

Here is how the Base Collector Delay Time equation looks like with Units.

Here is how the Base Collector Delay Time equation looks like.

5.5Edit=5295Edit-(6.4Edit+10.1Edit+5273Edit)
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Base Collector Delay Time Solution

Follow our step by step solution on how to calculate Base Collector Delay Time?

FIRST Step Consider the formula
τscr=τec-(τc+τb+τe)
Next Step Substitute values of Variables
τscr=5295μs-(6.4μs+10.1μs+5273μs)
Next Step Convert Units
τscr=0.0053s-(6.4E-6s+1E-5s+0.0053s)
Next Step Prepare to Evaluate
τscr=0.0053-(6.4E-6+1E-5+0.0053)
Next Step Evaluate
τscr=5.5000000000003E-06s
Next Step Convert to Output's Unit
τscr=5.5000000000003μs
LAST Step Rounding Answer
τscr=5.5μs

Base Collector Delay Time Formula Elements

Variables
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.
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.
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.
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.
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.

Other formulas in BJT Microwave Devices category

​Go Cut-off Frequency of Microwave
fco=12πτec
​Go Base Transit Time
τb=τec-(τscr+τc+τe)
​Go Collector Charging Time
τc=τec-(τscr+τb+τe)
​Go Maximum Frequency of Oscillations
fm=fT8πRbCc

How to Evaluate Base Collector Delay Time?

Base Collector Delay Time evaluator uses Base Collector Delay Time = Emitter Collector Delay Time-(Collector Charging Time+Base Transit Time+Emitter Charging Time) to evaluate the Base Collector Delay Time, The Base Collector Delay Time, also known as the transition time, is the time taken for the collector current of a bipolar junction transistor (BJT) to fall from its maximum value to a specified percentage (usually 10%) of its maximum value after the base current has been reduced to zero. Base Collector Delay Time is denoted by τscr symbol.

How to evaluate Base Collector Delay Time using this online evaluator? To use this online evaluator for Base Collector Delay Time, enter Emitter Collector Delay Time ec), Collector Charging Time c), Base Transit Time b) & Emitter Charging Time e) and hit the calculate button.

FAQs on Base Collector Delay Time

What is the formula to find Base Collector Delay Time?
The formula of Base Collector Delay Time is expressed as Base Collector Delay Time = Emitter Collector Delay Time-(Collector Charging Time+Base Transit Time+Emitter Charging Time). Here is an example- 5.5E+6 = 0.005295-(6.4E-06+1.01E-05+0.005273).
How to calculate Base Collector Delay Time?
With Emitter Collector Delay Time ec), Collector Charging Time c), Base Transit Time b) & Emitter Charging Time e) we can find Base Collector Delay Time using the formula - Base Collector Delay Time = Emitter Collector Delay Time-(Collector Charging Time+Base Transit Time+Emitter Charging Time).
Can the Base Collector Delay Time be negative?
No, the Base Collector Delay Time, measured in Time cannot be negative.
Which unit is used to measure Base Collector Delay Time?
Base Collector Delay Time is usually measured using the Microsecond[μs] for Time. Second[μs], Millisecond[μs], Nanosecond[μs] are the few other units in which Base Collector Delay Time can be measured.
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