Switching Power in CMOS Solution

STEP 0: Pre-Calculation Summary
Formula Used
Switching Power = (Positive Voltage^2)*Frequency*Capacitance
Ps = (Vdd^2)*f*C
This formula uses 4 Variables
Variables Used
Switching Power - (Measured in Watt) - Switching Power is called the dynamic power because it arises from the switching of the load.
Positive Voltage - (Measured in Volt) - 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.
Frequency - (Measured in Hertz) - Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second.
Capacitance - (Measured in Farad) - Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential.
STEP 1: Convert Input(s) to Base Unit
Positive Voltage: 2.58 Volt --> 2.58 Volt No Conversion Required
Frequency: 4 Hertz --> 4 Hertz No Conversion Required
Capacitance: 4.9 Microfarad --> 4.9E-06 Farad (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Ps = (Vdd^2)*f*C --> (2.58^2)*4*4.9E-06
Evaluating ... ...
Ps = 0.00013046544
STEP 3: Convert Result to Output's Unit
0.00013046544 Watt -->0.13046544 Milliwatt (Check conversion here)
FINAL ANSWER
0.13046544 0.130465 Milliwatt <-- Switching Power
(Calculation completed in 00.004 seconds)

Credits

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Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat
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17 CMOS Power Metrics Calculators

Gates on Critical Path
Go Gates on Critical Path = Duty Cycle*(Off Current*(10^Base Collector Voltage))/(Capacitance of Gate to Channel*[BoltZ]*Base Collector Voltage)
Subthreshold Leakage through OFF Transistors
Go Subthreshold Current = (CMOS Static Power/Base Collector Voltage)-(Gate Current+Contention Current+Junction Current)
Contention Current in Ratioed Circuits
Go Contention Current = (CMOS Static Power/Base Collector Voltage)-(Subthreshold Current+Gate Current+Junction Current)
Gate Leakage through Gate Dielectric
Go Gate Current = (CMOS Static Power/Base Collector Voltage)-(Subthreshold Current+Contention Current+Junction Current)
Output Switching at Load Power Consumption
Go Output Switching = Capacitive Load Power Consumption/(External Load Capacitance*Supply Voltage^2*Output Signal Frequency)
Capacitive Load Power Consumption
Go Capacitive Load Power Consumption = External Load Capacitance*Supply Voltage^2*Output Signal Frequency*Output Switching
Activity Factor
Go Activity Factor = Switching Power/(Capacitance*Base Collector Voltage^2*Frequency)
Switching Power
Go Switching Power = Activity Factor*(Capacitance*Base Collector Voltage^2*Frequency)
Power Supply Rejection Ratio
Go Power Supply Rejection Ratio = 20*log10(Input Voltage Ripple/Output Voltage Ripple)
Switching Power in CMOS
Go Switching Power = (Positive Voltage^2)*Frequency*Capacitance
Switching Energy in CMOS
Go Switching Energy in CMOS = Total Energy in CMOS-Leakage Energy in CMOS
Leakage Energy in CMOS
Go Leakage Energy in CMOS = Total Energy in CMOS-Switching Energy in CMOS
Total Energy in CMOS
Go Total Energy in CMOS = Switching Energy in CMOS+Leakage Energy in CMOS
Short-Circuit Power in CMOS
Go Short-Circuit Power = Dynamic Power-Switching Power
Dynamic Power in CMOS
Go Dynamic Power = Short-Circuit Power+Switching Power
Total Power in CMOS
Go Total Power = CMOS Static Power+Dynamic Power
Static Power in CMOS
Go CMOS Static Power = Total Power-Dynamic Power

Switching Power in CMOS Formula

Switching Power = (Positive Voltage^2)*Frequency*Capacitance
Ps = (Vdd^2)*f*C

What is static and dynamic power in VLSI?

Static power is power consumed while there is no circuit activity. For example, the power consumed by a D flip-flop when neither the clock nor the D input have active inputs (i.e., all inputs are "static" because they are at fixed dc levels). Dynamic power is power consumed while the inputs are active.

How to Calculate Switching Power in CMOS?

Switching Power in CMOS calculator uses Switching Power = (Positive Voltage^2)*Frequency*Capacitance to calculate 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 Ps symbol.

How to calculate Switching Power in CMOS using this online calculator? To use this online calculator for Switching Power in CMOS, enter Positive Voltage (Vdd), Frequency (f) & Capacitance (C) and hit the calculate button. Here is how the Switching Power in CMOS calculation can be explained with given input values -> 9.06304 = (2.58^2)*4*4.9E-06.

FAQ

What is Switching Power in CMOS?
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 and is represented as Ps = (Vdd^2)*f*C or Switching Power = (Positive Voltage^2)*Frequency*Capacitance. 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, Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second & Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential.
How to calculate Switching Power in CMOS?
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 is calculated using Switching Power = (Positive Voltage^2)*Frequency*Capacitance. To calculate Switching Power in CMOS, you need Positive Voltage (Vdd), Frequency (f) & Capacitance (C). With our tool, you need to enter the respective value for Positive Voltage, Frequency & Capacitance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Switching Power?
In this formula, Switching Power uses Positive Voltage, Frequency & Capacitance. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Switching Power = Activity Factor*(Capacitance*Base Collector Voltage^2*Frequency)
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