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Transit Time of PNP Transistor Formula

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Transit time in a transistor is crucial as it determines the maximum frequency at which the transistor can operate effectively. Check FAQs

τ f = \frac{{W b}^{2}}{2 \cdot D p}

τ_f - Transit Time?W_b - Base Width?D_p - Diffusion Constant For PNP?

Transit Time of PNP Transistor Example

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Here is how the Transit Time of PNP Transistor equation looks like with Values.

Here is how the Transit Time of PNP Transistor equation looks like with Units.

Here is how the Transit Time of PNP Transistor equation looks like.

0.32 = \frac{8^{2}}{2 \cdot 100}

0.32s = \frac{{8cm}^{2}}{2 \cdot 100cm²/s}

0.32 = \frac{8^{2}}{2 \cdot 100}

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Transit Time of PNP Transistor Solution

Follow our step by step solution on how to calculate Transit Time of PNP Transistor?

FIRST Step Consider the formula

τ f = \frac{{W b}^{2}}{2 \cdot D p}

Next Step Substitute values of Variables

∴

τ f = \frac{{8cm}^{2}}{2 \cdot 100cm²/s}

Next Step Convert Units

∴

τ f = \frac{{0.08m}^{2}}{2 \cdot 0.01m²/s}

Next Step Prepare to Evaluate

∴

τ f = \frac{{0.08}^{2}}{2 \cdot 0.01}

LAST Step Evaluate

∴

τ f = 0.32s

Transit Time of PNP Transistor Formula Elements

Variables

Transit Time

Transit time in a transistor is crucial as it determines the maximum frequency at which the transistor can operate effectively.

Symbol: τ_f

Measurement: TimeUnit: s

Note: Value can be positive or negative.

Formulas to find Transit Time

Base Width

The base width is an important parameter affecting the transistor's characteristics, especially in terms of its operation and speed.

Symbol: W_b

Measurement: LengthUnit: cm

Note: Value can be positive or negative.

Formulas to find Base Width

Diffusion Constant For PNP

Diffusion Constant For PNP describes how easily these minority carriers diffuse through the semiconductor material when an electric field is applied.

Symbol: D_p

Measurement: DiffusivityUnit: cm²/s

Note: Value should be greater than 0.

Formulas to find Diffusion Constant For PNP

Other formulas in P Channel Enhancement category

Go Drain Current in Triode Region of PMOS Transistor

I d = k' p \cdot WL \cdot ((V GS - mod \underset{̲}{u} s (V T)) \cdot V DS - \frac{1}{2} \cdot {(V DS)}^{2})

Go Drain Current in Triode Region of PMOS Transistor given Vsd

I d = k' p \cdot WL \cdot (mod \underset{̲}{u} s (V ov) - \frac{1}{2} \cdot V DS) \cdot V DS

Go Drain Current in Saturation Region of PMOS Transistor

I ds = \frac{1}{2} \cdot k' p \cdot WL \cdot {(V GS - mod \underset{̲}{u} s (V T))}^{2}

Go Drain Current in Saturation Region of PMOS Transistor given Vov

I ds = \frac{1}{2} \cdot k' p \cdot WL \cdot {(V ov)}^{2}

How to Evaluate Transit Time of PNP Transistor?

Transit Time of PNP Transistor evaluator uses Transit Time = Base Width^2/(2*Diffusion Constant For PNP) to evaluate the Transit Time, The Transit Time of PNP Transistor formula is defined as it determines the maximum frequency at which the transistor can operate effectively. The transit time is a result of the time taken for carriers to cross the base region. It affects the transistor's high-frequency performance, as it influences the device's ability to respond to rapid changes in input signals. Transit Time is denoted by τ_f symbol.

How to evaluate Transit Time of PNP Transistor using this online evaluator? To use this online evaluator for Transit Time of PNP Transistor, enter Base Width (W_b) & Diffusion Constant For PNP (D_p) and hit the calculate button.

FAQs on Transit Time of PNP Transistor

What is the formula to find Transit Time of PNP Transistor?

The formula of Transit Time of PNP Transistor is expressed as Transit Time = Base Width^2/(2*Diffusion Constant For PNP). Here is an example- 0.32 = 0.08^2/(2*0.01).

How to calculate Transit Time of PNP Transistor?

With Base Width (W_b) & Diffusion Constant For PNP (D_p) we can find Transit Time of PNP Transistor using the formula - Transit Time = Base Width^2/(2*Diffusion Constant For PNP).

Can the Transit Time of PNP Transistor be negative?

Yes, the Transit Time of PNP Transistor, measured in Time can be negative.

Which unit is used to measure Transit Time of PNP Transistor?

Transit Time of PNP Transistor is usually measured using the Second[s] for Time. Millisecond[s], Microsecond[s], Nanosecond[s] are the few other units in which Transit Time of PNP Transistor can be measured.

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