Tagged Questions

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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35 views

falling delay inverters VLSI CMOS

How do I obtain the falling delay driving by signal A: Data: ...
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1answer
37 views

Blocking/Nonblocking with Delay

I am now confused by one piece of Verilog Codee, its kind of testing the blocking or non-blocking assignment features that combination with Delay model. ...
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3answers
85 views

Double tap push button which resets if not pressed twice in quick succession?

I'm new to electronics, so don't know where to begin - I'm trying to create a push button which needs to be pressed twice in quick succession, to actually power on a device. Pressing it just once, or ...
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0answers
42 views

Simulation to find worst-case delay path

Assume there is a combinational logic function implemented by a CMOS logic inside (1 Pull Up network and 1 Pull Down network). From the intuition of RC Tree elmore delay analysis, we know that input ...
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2answers
85 views

Making variable delay routines

I know how to write accurate delay routines in assembly to run on a PIC microcontroller. The problem I have is creating delays of a arbitrary length. What I want to do is accept some data which ...
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1answer
43 views

In Altium Designer, how can you set the autotracer to route all traces with as equal lengths as possible?

Note that this board does not require a power or ground plane, since it's just used to bridge two boards. I want the traces to be as equal in length as possible in order to minimize any difference in ...
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1answer
58 views

Simple delay functions for TI Launchpad?

In Atmel Microcontrollers, there are simple delay functions such as __delay_ms() and __delay_us() found in ...
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3answers
846 views

Is this a correct way to have a 1 second delay?

If I have a PIC24 with a 4 MHz frequency. Is it accurate to have a 1 second delay by having 4 million clock cycles? I made a 1 second delay like this on my PIC24FJ128GA010: ...
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1answer
43 views

Clock / timer activated 2 second voltage timer for wiper motor project

Ok, I need a 12 volt voltage timer using clock or timer for a wiper motor. I am working on a project in my garage. Simply put, I am wanting to use a wiper motor that will open and close a spring held ...
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0answers
31 views

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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4answers
291 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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1answer
68 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
146 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
93 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
115 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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0answers
43 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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0answers
73 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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0answers
73 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 ...
2
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1answer
106 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
1k 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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2answers
68 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
135 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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votes
3answers
932 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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0answers
70 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
92 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. ...
2
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1answer
158 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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votes
2answers
224 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
98 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
689 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 ...
4
votes
2answers
462 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 ...
2
votes
1answer
115 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
142 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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votes
1answer
84 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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0answers
101 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
185 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
122 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 ...
0
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1answer
126 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?
2
votes
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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2answers
897 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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votes
1answer
133 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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4answers
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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0answers
123 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 ...
0
votes
1answer
433 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 ...
1
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3answers
296 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 ...
0
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2answers
178 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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vote
2answers
89 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
5k 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 ...
0
votes
1answer
655 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
86 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 ...