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Switching Power in CMOS Formula

GoSwitching Power Formula

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Switching Power is called the dynamic power because it arises from the switching of the load. Check FAQs

P s = ({V dd}^{2}) \cdot f \cdot C

P_s - Switching Power?V_dd - Positive Voltage?f - Frequency?C - Capacitance?

Switching Power in CMOS Example

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With units

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Here is how the Switching Power in CMOS equation looks like with Values.

Here is how the Switching Power in CMOS equation looks like with Units.

Here is how the Switching Power in CMOS equation looks like.

0.1305 = ({2.58}^{2}) \cdot 4 \cdot 4.9

0.1305mW = ({2.58V}^{2}) \cdot 4Hz \cdot 4.9μF

0.1305 = ({2.58}^{2}) \cdot 4 \cdot 4.9

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Switching Power in CMOS Solution

Follow our step by step solution on how to calculate Switching Power in CMOS?

FIRST Step Consider the formula

P s = ({V dd}^{2}) \cdot f \cdot C

Next Step Substitute values of Variables

∴

P s = ({2.58V}^{2}) \cdot 4Hz \cdot 4.9μF

Next Step Convert Units

∴

P s = ({2.58V}^{2}) \cdot 4Hz \cdot 4.9E-6F

Next Step Prepare to Evaluate

∴

P s = ({2.58}^{2}) \cdot 4 \cdot 4.9E-6

Next Step Evaluate

∴

P s = 0.00013046544W

Next Step Convert to Output's Unit

∴

P s = 0.13046544mW

LAST Step Rounding Answer

∴

P s = 0.1305mW

Switching Power in CMOS Formula Elements

Variables

Switching Power

Switching Power is called the dynamic power because it arises from the switching of the load.

Symbol: P_s

Measurement: PowerUnit: mW

Note: Value should be greater than 0.

Formulas to find Switching Power

Positive Voltage

The positive voltage is defined as the voltage calculated when the circuit is connected to the power supply.It is usually called Vdd or power supply of the circuit.

Symbol: V_dd

Measurement: Electric PotentialUnit: V

Note: Value should be greater than 0.

Formulas to find Positive Voltage

Frequency

Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second.

Symbol: f

Measurement: FrequencyUnit: Hz

Note: Value should be greater than 0.

Formulas to find Frequency

Capacitance

Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential.

Symbol: C

Measurement: CapacitanceUnit: μF

Note: Value should be greater than 0.

Formulas to find Capacitance

Other Formulas to find Switching Power

Go Switching Power

P s = α \cdot (C \cdot {V bc}^{2} \cdot f)

Other formulas in CMOS Power Metrics category

Go Activity Factor

α = \frac{P s}{C \cdot {V bc}^{2} \cdot f}

Go Dynamic Power in CMOS

P dyn = P sc + P s

Go Short-Circuit Power in CMOS

P sc = P dyn - P s

Go Static Power in CMOS

P st = P t - P dyn

How to Evaluate Switching Power in CMOS?

Switching Power in CMOS evaluator uses Switching Power = (Positive Voltage^2)*Frequency*Capacitance to evaluate the Switching Power, Switching Power in CMOS formula is defined as energy that is required to charge and discharge the load capacitance. This is called dynamic power because it is consumed when the circuit is actively switching. Switching Power is denoted by P_s symbol.

How to evaluate Switching Power in CMOS using this online evaluator? To use this online evaluator for Switching Power in CMOS, enter Positive Voltage (V_dd), Frequency (f) & Capacitance (C) and hit the calculate button.

FAQs on Switching Power in CMOS

What is the formula to find Switching Power in CMOS?

The formula of Switching Power in CMOS is expressed as Switching Power = (Positive Voltage^2)*Frequency*Capacitance. Here is an example- 9.06304 = (2.58^2)*4*4.9E-06.

How to calculate Switching Power in CMOS?

With Positive Voltage (V_dd), Frequency (f) & Capacitance (C) we can find Switching Power in CMOS using the formula - Switching Power = (Positive Voltage^2)*Frequency*Capacitance.

What are the other ways to Calculate Switching Power?

Here are the different ways to Calculate Switching Power-

Switching Power=Activity Factor*(Capacitance*Base Collector Voltage^2*Frequency)

Can the Switching Power in CMOS be negative?

No, the Switching Power in CMOS, measured in Power cannot be negative.

Which unit is used to measure Switching Power in CMOS?

Switching Power in CMOS is usually measured using the Milliwatt[mW] for Power. Watt[mW], Kilowatt[mW], Microwatt[mW] are the few other units in which Switching Power in CMOS can be measured.

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Switching Power in CMOS Formula

​GoSwitching Power Formula

Switching Power in CMOS Example

Switching Power in CMOS Solution

Switching Power in CMOS Formula Elements

Other Formulas to find Switching Power

Other formulas in CMOS Power Metrics category

How to Evaluate Switching Power in CMOS?

FAQs on Switching Power in CMOS

Variable Name

GoSwitching Power Formula