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Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat
Shobhit Dimri has created this Calculator and 500+ more calculators!
Vishwakarma Government Engineering College (VGEC), Ahmedabad
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Activity factor Solution

STEP 0: Pre-Calculation Summary
Formula Used
activity_factor_cmos = Switching Power/(Capacitance*Drain Voltage*frequency)
α = Pswitching/(C*vds*f)
This formula uses 4 Variables
Variables Used
Switching Power - Switching Power is called the dynamic power because it arises from the switching of the load (Measured in Watt)
Capacitance - Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential. (Measured in Farad)
Drain Voltage - Drain Voltage is the voltage that falls across the gate-source terminal of the transistor. (Measured in Volt)
frequency - Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second. (Measured in Cycle per Second)
STEP 1: Convert Input(s) to Base Unit
Switching Power: 9 Watt --> 9 Watt No Conversion Required
Capacitance: 3 Farad --> 3 Farad No Conversion Required
Drain Voltage: 8 Volt --> 8 Volt No Conversion Required
frequency: 90 Cycle per Second --> 90 Hertz (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
α = Pswitching/(C*vds*f) --> 9/(3*8*90)
Evaluating ... ...
α = 0.00416666666666667
STEP 3: Convert Result to Output's Unit
0.00416666666666667 --> No Conversion Required
FINAL ANSWER
0.00416666666666667 <-- activity factor CMOS
(Calculation completed in 00.013 seconds)

10+ CMOS-VLSI Design Calculators

Drain Voltage
drain_voltage = sqrt(dynamic power/frequency*Capacitance) Go
Gate to Channel Voltage
gate_to_channel_voltage = (Channel Charge/Gate Capacitance)+Threshold voltage Go
Threshold Voltage
threshold_voltage = Gate to Channel Voltage-(Channel Charge/Gate Capacitance) Go
Gate Capacitance
channel_charge = Gate Capacitance*(Gate to Channel Voltage-Threshold voltage) Go
Channel Charge
channel_charge = Gate Capacitance*(Gate to Channel Voltage-Threshold voltage) Go
Capacitor dynamic power
dynamic_power = Drain Voltage^2*frequency*Capacitance Go
Potential gate to Collector
potential_gate_to_collector = (Potential Gate to Source+Potential Gate to Drain)/2 Go
Potential Gate to Drain
potential_gate_to_drain = 2*potential gate to collector-Potential Gate to Source Go
Static Current
static_current = Static power/Drain Voltage Go
Static Power Dissipation
static_power = static current*Drain Voltage Go

Activity factor Formula

activity_factor_cmos = Switching Power/(Capacitance*Drain Voltage*frequency)
α = Pswitching/(C*vds*f)

Why Pmos And Nmos Are Sized Equally In A Transmission Gates?

In Transmission Gate, PMOS and NMOS aid each other rather competing with each other. That's the reason why we need not size them like in CMOS. In CMOS design we have NMOS and PMOS competing which is the reason we try to size them proportional to their mobility.

How to Calculate Activity factor?

Activity factor calculator uses activity_factor_cmos = Switching Power/(Capacitance*Drain Voltage*frequency) to calculate the activity factor CMOS, The Activity factor formula is defined as the load capacitance is charged and stores energy during 3/16 of all input transitions. This fraction is called the activity factor or alpha. activity factor CMOS and is denoted by α symbol.

How to calculate Activity factor using this online calculator? To use this online calculator for Activity factor, enter Switching Power (Pswitching), Capacitance (C), Drain Voltage (vds) and frequency (f) and hit the calculate button. Here is how the Activity factor calculation can be explained with given input values -> 0.004167 = 9/(3*8*90).

FAQ

What is Activity factor?
The Activity factor formula is defined as the load capacitance is charged and stores energy during 3/16 of all input transitions. This fraction is called the activity factor or alpha and is represented as α = Pswitching/(C*vds*f) or activity_factor_cmos = Switching Power/(Capacitance*Drain Voltage*frequency). Switching Power is called the dynamic power because it arises from the switching of the load, Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential, Drain Voltage is the voltage that falls across the gate-source terminal of the transistor and Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second.
How to calculate Activity factor?
The Activity factor formula is defined as the load capacitance is charged and stores energy during 3/16 of all input transitions. This fraction is called the activity factor or alpha is calculated using activity_factor_cmos = Switching Power/(Capacitance*Drain Voltage*frequency). To calculate Activity factor, you need Switching Power (Pswitching), Capacitance (C), Drain Voltage (vds) and frequency (f). With our tool, you need to enter the respective value for Switching Power, Capacitance, Drain Voltage and frequency 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 activity factor CMOS?
In this formula, activity factor CMOS uses Switching Power, Capacitance, Drain Voltage and frequency. We can use 10 other way(s) to calculate the same, which is/are as follows -
  • dynamic_power = Drain Voltage^2*frequency*Capacitance
  • drain_voltage = sqrt(dynamic power/frequency*Capacitance)
  • static_power = static current*Drain Voltage
  • static_current = Static power/Drain Voltage
  • channel_charge = Gate Capacitance*(Gate to Channel Voltage-Threshold voltage)
  • channel_charge = Gate Capacitance*(Gate to Channel Voltage-Threshold voltage)
  • gate_to_channel_voltage = (Channel Charge/Gate Capacitance)+Threshold voltage
  • threshold_voltage = Gate to Channel Voltage-(Channel Charge/Gate Capacitance)
  • potential_gate_to_collector = (Potential Gate to Source+Potential Gate to Drain)/2
  • potential_gate_to_drain = 2*potential gate to collector-Potential Gate to Source
Where is the Activity factor calculator used?
Among many, Activity factor calculator is widely used in real life applications like {FormulaUses}. Here are few more real life examples -
{FormulaExamplesList}
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