Rise Time Calculator

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CMOS Delay Characteristics

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CMOS Time Characteristics

✖Edge rate is defined as the ratio of rise time to the fall time.ⓘ Edge Rate [t_e]			+10% -10%
✖Fall time is time for a waveform to fall from 80% to 20% of its steady-state value.ⓘ Fall Time [t_f]			+10% -10%

✖Rise Time is defined as the time required for a pulse to rise from 10 per cent to 90 per cent of its steady value in CMOS devices.ⓘ Rise Time [t_r]

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Formula

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Rise Time

Formula

`"t"_{"r"} = 2*"t"_{"e"}-"t"_{"f"} `

Example

`"2.8ns"=2*"6ns"-"9.2ns" `

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Rise Time Solution

STEP 0: Pre-Calculation Summary

Formula Used

Rise Time = 2*Edge Rate-Fall Time
t_r = 2*t_e-t_f
This formula uses 3 Variables

Variables Used

Rise Time - (Measured in Second) - Rise Time is defined as the time required for a pulse to rise from 10 per cent to 90 per cent of its steady value in CMOS devices.
Edge Rate - (Measured in Second) - Edge rate is defined as the ratio of rise time to the fall time.
Fall Time - (Measured in Second) - Fall time is time for a waveform to fall from 80% to 20% of its steady-state value.

STEP 1: Convert Input(s) to Base Unit

Edge Rate: 6 Nanosecond --> 6E-09 Second (Check conversion here)
Fall Time: 9.2 Nanosecond --> 9.2E-09 Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

t_r = 2*t_e-t_f --> 2*6E-09-9.2E-09

Evaluating ... ...

t_r = 2.8E-09

STEP 3: Convert Result to Output's Unit

2.8E-09 Second -->2.8 Nanosecond (Check conversion here)

FINAL ANSWER

2.8 Nanosecond <-- Rise Time

(Calculation completed in 00.020 seconds)

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Created by Shobhit Dimri

Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat

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< 13 CMOS Delay Characteristics Calculators

Delay Rise

Go Delay Rise = Intrinsic Rise Delay+(Rise Resistance*Delay Capacitance)+(Slope Rise*Delay Previous)

Delay of AND-OR Gate in Gray Cell

Go Delay of AND OR Gate = (Critical Path Delay-Total Propagation Delay-XOR Gate Delay)/(Gates on Critical Path-1)

Delay of 1-Bit Propagate Gates

Go Total Propagation Delay = Critical Path Delay-((Gates on Critical Path-1)*Delay of AND OR Gate+XOR Gate Delay)

Propagation Delay in Circuit

Go Circuit Propagation Delay = (Propagation Delay High to Low+Propagation Delay Low to High)/2

Propagation Delay without Parasitic Capacitance

Go Propagation Delay Capaitance = Circuit Propagation Delay/Normalized Delay

Propagation Delay

Go Total Propagation Delay = Normalized Delay*Propagation Delay Capaitance

Normalized Delay

Go Normalized Delay = Total Propagation Delay/Propagation Delay Capaitance

Voltage-Controlled Delay Line

Go Voltage-Controlled Delay Line = Small Deviation Delay/VCDL Gain

Small Deviation Delay

Go Small Deviation Delay = VCDL Gain*Voltage-Controlled Delay Line

VCDL Gain

Go VCDL Gain = Small Deviation Delay/Voltage-Controlled Delay Line

Edge Rate

Go Edge Rate = (Rise Time+Fall Time)/2

Fall Time

Go Fall Time = 2*Edge Rate-Rise Time

Rise Time

Go Rise Time = 2*Edge Rate-Fall Time

Rise Time Formula

Rise Time = 2*Edge Rate-Fall Time
t_r = 2*t_e-t_f

Explain sizing of the inverter?

Sizing of an inverter in digital circuit design involves determining the appropriate dimensions (width and length) of the transistors within the inverter circuit.

How to Calculate Rise Time?

Rise Time calculator uses Rise Time = 2*Edge Rate-Fall Time to calculate the Rise Time, Rise time refers to the time it takes for the output voltage of a digital signal to transition from a low logic level (logic '0') to a high logic level (logic '1') during a rising transition. It is a critical parameter that impacts the speed, performance, and signal integrity of CMOS digital circuits. Rise Time is denoted by t_r symbol.

How to calculate Rise Time using this online calculator? To use this online calculator for Rise Time, enter Edge Rate (t_e) & Fall Time (t_f) and hit the calculate button. Here is how the Rise Time calculation can be explained with given input values -> 5.5E+9 = 2*6E-09-9.2E-09 .

FAQ

What is Rise Time?

Rise time refers to the time it takes for the output voltage of a digital signal to transition from a low logic level (logic '0') to a high logic level (logic '1') during a rising transition. It is a critical parameter that impacts the speed, performance, and signal integrity of CMOS digital circuits and is represented as t_r = 2*t_e-t_f or Rise Time = 2*Edge Rate-Fall Time. Edge rate is defined as the ratio of rise time to the fall time & Fall time is time for a waveform to fall from 80% to 20% of its steady-state value.

How to calculate Rise Time?

Rise time refers to the time it takes for the output voltage of a digital signal to transition from a low logic level (logic '0') to a high logic level (logic '1') during a rising transition. It is a critical parameter that impacts the speed, performance, and signal integrity of CMOS digital circuits is calculated using Rise Time = 2*Edge Rate-Fall Time. To calculate Rise Time, you need Edge Rate (t_e) & Fall Time (t_f). With our tool, you need to enter the respective value for Edge Rate & Fall Time and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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