In electronics, a delay is an amount of time between two events. For example, the time between input and output of a signal in a circuit could be referred to as the processing time, or the delay. Sometimes delay is added deliberately, as in certain audio effects.

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How to calculate average delay time of circuit having several possible transition states

Is it possible to calculate average delay for all possible states directly without calculating them individually using Xilinx or with Cadence.
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269 views

Which circuit to use to automatically turn off the backlight of a GLCD after 30s?

Have you ever seen smart phones automatically turn their screens off after a short time to save the power? I want to do it on the back light of my GLCD (ks108sed). Descriptions: Back light will ...
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52 views

Combinational logic delay is greater than clock period

Suppose you have a combinational circuit between two registers driven by a clock. What will you do if the delay of the combinational circuit is greater than your clock signal? (You can’t resize the ...
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3answers
114 views

How can I add a power-off delay to this circuit

This may seem simple but I am trying to learn EE. In the below circuit, how can I add a delay when the button is released the relay will stay energized for approx. 5 seconds. My Circuit: ...
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2answers
82 views

How to ADD a delay to coaxial tv signal?

Is there a way to add a delay that can be increased/deceased as required to a coaxial tv signal?
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1answer
87 views

Determining Pipeline Cycle Time

I'm having trouble figuring out how the longest stage of a pipeline is calculated given the following: "Your processor has a 3-stage pipeline where the delay is 26ns through the first stage, 40ns ...
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36 views

Calculating most likely time delay from multiple phase-shifts

Suppose you have a reference signal, which is sinusoidal. This signal travels in a path that adds time delay and returns to be compared with the original. The result is a phase shift between the ...
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59 views

Pulse reset line with long press of a button

This question is a variation of How to trigger reset at long press of button. Namely, I need to pull down a reset line with a short pulse of X length, if a button is pressed for Y>=X or more seconds. ...
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52 views

Mono-stable trigger circuit (monoflop) with start delay

I'm sorry if this question is a duplicate, but I'm not sure about the right terminology (in english) about my problem. I've got a device which operates at 13.5V. I want to switch this device with a ...
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1answer
93 views

SN7400N unusally high propagation delay

For a small lab project I was asked to measure the propagation delay of a SN7400N NAND-Gate. In order to do this i connected one input pin to 5V and the other one to a clock running at 1 kHz. I ...
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2answers
490 views

Why is NAND gate preferred over NOR gate in industry?

I have read at numerous places that NAND gate is preferred over NOR gate in industry. The reasons given online say: NAND has lesser delay than Nor due to the NAND PMOS (size 2 and in parallel) ...
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61 views

Latching circuit that delays the on state for different outputs

First, I'm very inexperienced in designing circuits like this, so I apologize if this seems trivial. I'm basically trying to create a startup sequence effect, where LEDs turn on in a delayed order. ...
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1answer
120 views

Simple question (I guess): 555 timer

I want to know if it's possible to have a push button so that when it's activated, it turns on my 9 volts circuit for 10 minutes and then turn it off. Also, I don't want this circuit to consume ...
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3answers
664 views

Software delay vs hardware timers

Working with a micro controller, on which exact conditions should we choose between Hardware timers and Software delays on an Embedded Controller? I have seen articles which do emphasize on use of ...
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64 views

Hold switch trigger delayed

I have a small battery driven, microchip controlled project where I use a rotary encoder for toggling/setting various settings. Mostly software based as that is what I'm more familiar with as of yet. ...
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2answers
85 views

Variable delay element [closed]

This code if compiled has an error appear with (k) symbol. I need to implement this simple block. k (that represents the amount of delay) will come to my block from the previous block. ...
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1answer
96 views

Understanding max and min propagation delay in flip-flops

I've been working my way through Digital Design and Computer Architecture, but am very confused by the equations for time delay - what each of the variables are, and how to conceptualize these ...
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2answers
159 views

How to trigger reset at long press of button

I am trying to make a button control on/off and reset all in one, but I can't quite get my head around how to design it. It should basically function like a PC power button. If short press it's ...
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0answers
78 views

CTMU Time Delay Measurement Not Working - PIC24F16KA302

I'm trying to use the CTMU unit in a PIC24F16KA302 in an impedance measuring system. I'm applying a sinusoidal signal to a component and creating a voltage and current signal which I can then use to ...
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2answers
524 views

Arduino-Arduino RF Communication, key needs to be pressed several times

I'm communicating two Arduino i.e. Arduio UNO as sender & Arduino Mega as receiver via RF-433 MHz transiver module. Communication is sort of working but there is one problem. If I want to send a ...
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2answers
395 views

Signal LED delay mini-circuit

In making a breakout board for an SMD Bluetooth module, I realized that simply wiring LEDs to your signal lines is insufficient for a decent visual indication, as signal duration is too short to be ...
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1answer
111 views

How can I simulate contamination delay in VHDL?

Propagation delay is simple to implement: Out <= '1' after 3ns; I tried to add contamination delay as such: ...
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1answer
126 views

Transistor as a mute switch, odd rise and fall times?

I need to mute (soft mute, no clicks and pops) an audio signal while routing it using a mechanical relay. I use a 2N5089 high gain NPN with a grounded emitter, collector to the signal output and the ...
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1answer
70 views

protecting a sensor component from high spikes when switching power on

I have an electrical scooter which has a "Hall Effect Sensor" in the handle-bar, measuring the magnetic flux to determine the amount of "gas" or gauge. This sensor tends to burn out quite frequently. ...
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90 views

Simple doorbell delay (add-on)

We have a new office doorbell with a pushbutton that rings a buzzer for as long as the button is held down (i.e. a simple circuit that is closed by the button). The buzzer sound is really "angry", and ...
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4answers
152 views

In CMOS, can I assume the delay of a multiplexer is negligible compared to the delay of an inverter?

Let say I have a ring oscillator, and I modify the ring so that the output of an inverter is connected to an input of a 2-to-1 MUX, and the output of the MUX is connected to the input of the next ...
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3answers
114 views

Dealing with digital circuits and their associated switching speed?

When designing a digital one-minute counting circuit I came across a difficult problem. Basically, I designed the circuit to drive the (normally HIGH) clock of the 10s slot low if the 1s slot's ...
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1answer
102 views

How to measure the delay of one single inverter in ASIC?

In practice, is it feasible for a chip manufacture to reliably and accurately measure the delay of one single inverter in ASIC? If it is, how can one go about doing it?
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1answer
257 views

Would shooting laser or UV light at an inverter make it permanently slower?

I'm studying the topic of cloning electronic circuits for my research. And I have a scenario as the following: Chip A has two ring oscillators (RO1a and RO2a). And RO1a is faster than RO2a. Chip B ...
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2answers
4k views

STM32F4 (Discovery board) universal delay (milisecs) function

On the net, I have found following function for delay in miliseconds for STM32F4 (Discovery board MCU): ...
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468 views

How to find Gate Delay

I need to find the delay of a full adder. I searched for it but I couldnt find absolute information. Sample delays : XOR - 8ns / AND - 2ns / OR - 2ns What is the delay of this circuit? My Solution ...
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101 views

MOSFET Delay Provider [closed]

I have this circuit, where i wish to turn lower one to ON after a delay, so that at one time only one of them is ON. The input wave is a PWM Square Wave. Can anyone suggest how i can do so?
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2k views

Delay function in ARM programming

I have just started programming on ARM, I had some experience on AVR but not that much. The question is probably too trivial but the material about ARM is too little on the net... sorry anyways. I ...
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113 views

Effects of Non-Linear Phase Shift/Delay in ADC

I am designing a monochrome image broadcast system that involves: Camera -> DAC -> Frequency Shift Keying (FSK Modulation)-> Broadcast over FM ----- Receiving & Demodulation -> ADC -> PC Image ...
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1answer
391 views

How would I delay a power on and power off

I need to delay power to the motors for my CNC driver project (using Toshiba TB6560 ICs, which require the motor power to be switched on after logic power and switched off before logic power). I ...
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3answers
240 views

What's The fundamental difference between interrupts and delay in embedded programming?

I'm new in embedded programming in C, just getting to understand coding. Is there a fundamental difference between an interrupt function and a delay function? I would greatly appreciate answers with ...
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2answers
151 views

How does using Flip Flops between transmission links increase the maximum clock speed?

I am learning about things such as propagation delay and Transmission delays. About how they limit the maximum Clock speed in a given system (where all the chips use the same clock line). I can't ...
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84 views

Assignments with after and signals

I am trying to understand how assignments with 'after foo' work, so I read about the delay model and simulated the following code: ...
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4answers
4k views

Transistor Delay

I'm attempting to make an alarm for a freezer so that if the door gets left open, after 1 minute or so, an alarm will sound. I've got something similar to the schematic below. When the switch is ...
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1answer
468 views

Maximum and Minimum delay of combinational logic circuits

I am preparing for my exam and I am stuck with this past year question: In the circuit shown below, the blocks A, B, C, and S are combination logic circuits. FF1 to FF3 are D flip-flops with same ...
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1answer
82 views

Power delay profile and broadband bus

I came across the following solved question, but I have trouble understanding part of the solution. If anyone could shed some light into this I would be really grateful since this problem has been ...
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1answer
93 views

Do I have to equate clock and Data Bus propagation delay for Transmission Lines?

My question is about SDRAM timings for clock and DataBUS. Som designer advice that clock pin has to be the shortest one. Data Bus may be longer than these because of the some problems. But clock trace ...
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3answers
238 views

how to create a square wave with large duration and high duty cycle

For a "plant waterer circuit" I would like to add a safety feature that prevents watering for over ~3 minutes, and delays the next watering from occurring for ~12 hours. Currently the circuit is ...
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1answer
54 views

Large range delay at medium frequency for MC

I have a program that varies the step time and duty cycle for a 6 step commutation sequence. It takes an 8-bit ADC result and stores it as the TMR0 value, when TMR0 overflows, the ISR selects the ...
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330 views

Drawing circuit activity through a D flip-flop while ignoring propagation delay

Can someone explain how would would draw the Y and Z activity in the following problem (if we ignore propagation delay and assume Y and Z start at 0)? How do the clock and X help in this problem? ...
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3answers
5k views

0-10 second on-time with a potentiometer

I would like to make a simple circuit, where the a potentiometer controls a 0 - 10 second on-time. If the potentiometer is set to min, the on time should be 0 seconds. If the potentiometer is maxed ...
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1answer
606 views

Generate DC pulse after switch turned off?

I've got a power source (say 12V DC) that I'm monitoring with a relay. I want to send a pulse (over 5V DC) to another relay for 60 seconds after the first power source has been turned off. A ...
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2answers
759 views

avr attiny84: wrong delay

I'm pretty new to avr programming. I'm facing a strange problem that I can't solve so far. I've wrote a simple code: ...
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2answers
134 views

Delay then off for tone signal

I have a simple circuit using a 555 timer as an oscillator to output a 12v tone to an intercom system. I'd like to make a delay circuit that will turn off the output of my circuit after a delay. ...
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274 views

Encoding delay of Ethernet and the relation to cable frequency rating

I asked a question here called "Speed of electricity (signal propagation?) through copper for communications delay". I wanted to know how long does it take a signal to travel down a length of Cat5e ...