Propagation Delay in Circuit Calculator

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CMOS Delay Characteristics

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✖Propagation Delay high to low is the time required for the output signal to change from its high level to its low level as a consequence of an input signal change.ⓘ Propagation Delay High to Low [t_pHL]			+10% -10%
✖Propagation Delay low to high is the time required for the output signal to change from its low level to its high level as a consequence of an input signal change.ⓘ Propagation Delay Low to High [t_pLH]			+10% -10%

✖Circuit Propagation Delay refers to the rise time or fall time in logic gates. This is the time it takes for a logic gate to change its output state based on a change in the input state.ⓘ Propagation Delay in Circuit [t_ckt]

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Propagation Delay in Circuit

Formula

`"t"_{"ckt"} = ("t"_{"pHL"}+"t"_{"pLH"})/2`

Example

`"8.16ns"=("7ns"+"9.32ns")/2`

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Propagation Delay in Circuit Solution

STEP 0: Pre-Calculation Summary

Formula Used

Circuit Propagation Delay = (Propagation Delay High to Low+Propagation Delay Low to High)/2
t_ckt = (t_pHL+t_pLH)/2
This formula uses 3 Variables

Variables Used

Circuit Propagation Delay - (Measured in Second) - Circuit Propagation Delay refers to the rise time or fall time in logic gates. This is the time it takes for a logic gate to change its output state based on a change in the input state.
Propagation Delay High to Low - (Measured in Second) - Propagation Delay high to low is the time required for the output signal to change from its high level to its low level as a consequence of an input signal change.
Propagation Delay Low to High - (Measured in Second) - Propagation Delay low to high is the time required for the output signal to change from its low level to its high level as a consequence of an input signal change.

STEP 1: Convert Input(s) to Base Unit

Propagation Delay High to Low: 7 Nanosecond --> 7E-09 Second (Check conversion here)
Propagation Delay Low to High: 9.32 Nanosecond --> 9.32E-09 Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

t_ckt = (t_pHL+t_pLH)/2 --> (7E-09+9.32E-09)/2

Evaluating ... ...

t_ckt = 8.16E-09

STEP 3: Convert Result to Output's Unit

8.16E-09 Second -->8.16 Nanosecond (Check conversion here)

FINAL ANSWER

8.16 Nanosecond <-- Circuit Propagation Delay

(Calculation completed in 00.004 seconds)

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Created by Shashank

Nitte Meenakshi Institute of Technology (NMIT), Bangalore

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Chandigarh University (CU), Punjab

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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

Propagation Delay in Circuit Formula

Circuit Propagation Delay = (Propagation Delay High to Low+Propagation Delay Low to High)/2
t_ckt = (t_pHL+t_pLH)/2

Propagation delay in electronic circuits

Electrical engineers need to take propagation delay into account when creating integrated circuits (ICs). This is due, in part, to the time it takes for an electrical charge to move through a semiconductor and for the individual gates to stabilize at the correct output. The speed that the charge can move is roughly 100,000 m/s to 200,000 m/s depending on the semiconductor material used.

Significance of Propagation Delay

Modern ICs can have billions of total gates and operate at incredible speed. Inconsistent propagation delay in an IC can cause data errors or race conditions on a chip. Therefore, the propagation delay is an important factor in high-speed circuit design and is a limiting factor of the processing speed, or hertz, that a processor can run at.

How to Calculate Propagation Delay in Circuit?

Propagation Delay in Circuit calculator uses Circuit Propagation Delay = (Propagation Delay High to Low+Propagation Delay Low to High)/2 to calculate the Circuit Propagation Delay, The Propagation Delay in Circuit is propagation delay is defined as the amount of time required after an input signal is applied and has stabilized to the input of a circuit to the time that the output of the circuit has stabilized to the correct output signal. Circuit Propagation Delay is denoted by t_ckt symbol.

How to calculate Propagation Delay in Circuit using this online calculator? To use this online calculator for Propagation Delay in Circuit, enter Propagation Delay High to Low (t_pHL) & Propagation Delay Low to High (t_pLH) and hit the calculate button. Here is how the Propagation Delay in Circuit calculation can be explained with given input values -> 8.2E+9 = (7E-09+9.32E-09)/2.

FAQ

What is Propagation Delay in Circuit?

The Propagation Delay in Circuit is propagation delay is defined as the amount of time required after an input signal is applied and has stabilized to the input of a circuit to the time that the output of the circuit has stabilized to the correct output signal and is represented as t_ckt = (t_pHL+t_pLH)/2 or Circuit Propagation Delay = (Propagation Delay High to Low+Propagation Delay Low to High)/2. Propagation Delay high to low is the time required for the output signal to change from its high level to its low level as a consequence of an input signal change & Propagation Delay low to high is the time required for the output signal to change from its low level to its high level as a consequence of an input signal change.

How to calculate Propagation Delay in Circuit?

The Propagation Delay in Circuit is propagation delay is defined as the amount of time required after an input signal is applied and has stabilized to the input of a circuit to the time that the output of the circuit has stabilized to the correct output signal is calculated using Circuit Propagation Delay = (Propagation Delay High to Low+Propagation Delay Low to High)/2. To calculate Propagation Delay in Circuit, you need Propagation Delay High to Low (t_pHL) & Propagation Delay Low to High (t_pLH). With our tool, you need to enter the respective value for Propagation Delay High to Low & Propagation Delay Low to High 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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