Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [delay]

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.

-2
votes
1answer
17 views

What are the regions of operation of pmos while the output rises?

In the CMOS inverter, when we calculate Tplh i.e. low to high propagation delay using the average current method, what region of operation the PMOS is in?
2
votes
1answer
88 views

STM32L0 - Delay in microseconds

I am using a B-L072Z-LRWAN1 board (which has a STM32L072 MCU) and I want to get data from a DHT11 sensor. To achieve this, I need a microseconds delay which I am not able to obtain. The libraries ...
0
votes
1answer
34 views

Programmatically determine the lowest waiting time for character LCD display

I made working code in an older microcontroller for a character based LCD that's based on the HD44780 chip. My code stops execution of everything else every 70uS to display one character from the ...
0
votes
1answer
32 views

How to turn off 555 Timer for a period of time after Vout signal passes through

I have a single-shot 555 Timer. After triggering, output goes high for a period of time. What I would like to do now: After Vout goes high and then low again, I want to disable the 555 timer for a ...
0
votes
1answer
37 views

LTC6994-2 signal inverted and time delayed

I use LTC6994-2 to delay and invert input signal. I want 2s delay between input and inverted output. However, this is what I get on the output: Green waveform is input waveform. Output (Blue ...
0
votes
0answers
39 views

Propagation delay equation of full adder

I know that the full adder circuit has two outputs i.e. S and Cout and the sum has 2 XOR gates having delay 2D and the output carry has three gates i.e XOR, AND and OR gate having delay 3D. So, the ...
1
vote
2answers
57 views

Why inverse of time delay is non causal

Please explain the following statement "If \$P(s)\$ contains a time delay term, \$P^{-1}(s)\$ is non-causal". Here '\$s\$' is Laplace variable. Can someone please explain the reason of non causality?
0
votes
1answer
78 views

How do I decrease the slew rate of an op amp?

I need to reduce the slew rate of a voltage follower, so that if I change the input signal from 0 to 5 v, the output signal will rise progressively up to 5 v in say, about 5 seconds, so a slew rate of ...
0
votes
1answer
35 views

Altera Cyclone IV clock-to-output delay

Trying to find what is the clock-to-output delay for registers inside EP4CE6E22C6. Have looked through the 3 Cyclone IV handbooks searching by delay but have not found any values specified. All the ...
0
votes
1answer
82 views

Is there such 555 timer circuit?

I was wondering if there is a simple 555 Timer circuit, or even simple transistors circuit, that has a HIGH output for 1sec, 2sec, or more seconds when I trigger the input switch and will remain HIGH ...
4
votes
1answer
90 views

How to avoid this voltage when I turn on the circuit?

What I want to do is an Delay ON, but when I press the switch this voltage pass for a brief moment and turns the led on for a moment. How can I avoid this? Should I put the switch somewhere else? ...
1
vote
0answers
37 views

Physical significance of positive group delay with negative phase delay

This question is an addendum to: Is group delay the same as the delay of a certain frequency? Lately, I've been going back to basics to better understand the concepts of group and phase delay, so I ...
2
votes
2answers
101 views

Is group delay the same as the delay of a certain frequency?

I know that group delay is the delay of the envelope, or the derivative of the phase with respect to \$\omega\$. What I want to know is what exactly happens in the time domain. For instance take the ...
1
vote
0answers
33 views

SDF back annotation in systemVerilog design using interfaces

I have a DUT which is encrypted netlist and .sdf file (normally we do functional and timing simulations with these inputs). I used interface feature in SystemVerilog so I don't define any port for the ...
0
votes
0answers
15 views

HM-TRP radio module works at 56K data speed but only in delayed chunks

I created the following setup: I created one circuit in which the PC connects to an HM-TRP radio module via a max232 DIP IC. This circuit for the test is the master to all devices and sends a 16 byte ...
-2
votes
2answers
158 views

how to resolve large combinational logic delay?

I am new to systemverilog. Recently I am working on a project for decoding a data stream from a AVALON_ST. Using systemverilog. My target device is Stratix V and the clock is 200Mz. ...
0
votes
3answers
54 views

Delay Low Signal, Fast High Signal

I have an active low circuit. I'd like to delay the low signal input when the it gets tied to ground, but allow the input to come up instantaneously when the ground is released. I've tried adding a ...
3
votes
1answer
65 views

How to change the delay variable Td for a tline component in LTspice?

I want to change the transmission delay-time Td (see picture) of a tline-component in LTspice as a function of time during simulation. From my understanding, I ...
0
votes
1answer
68 views

NE555 Circuit stops working after random time

i finished my NE555 circuit and created some pcbs. After a few attempts i could get the circuit working, and tested it successfully. I placed my circuit between a 12V 1.5Hz square wave signal and a ...
1
vote
1answer
19 views

Calculating required delay before pin value is recognized in 8051

I looked at the following in hopes my question will be answered: can we use 8051 pin as Input and output at a time? But the answer was vague. It stated: "though there is a 'strong' source ...
0
votes
1answer
71 views

Strange behaviour of ne555 + pmosfet circuit

I was a silent reader for a long time and could solve all the problems on my own, but this problem is really freaking me out. I was messing around until 3 AM today with this "feature" and still don't ...
1
vote
0answers
156 views

How can i create a dead time between two signals in Matlab/Simulink?

I have a curcuit which outputs two different pulse signals from two different "PWM generator(DC-DC)" block. I will apply these signals to two different mosfets. Thus I need to create a dead time to ...
1
vote
4answers
131 views

Delaying an electrical signal

I want to be able to delay the signal that goes from the cdi box to the igniton coil on my moped. I would like to be able to control the delay with something simple like a potentiometer, i don't need ...
1
vote
2answers
69 views

Meaning of the “pole” of a transfer function with time delay

I learned in basic control theory that we can determine the stability of an LTI system by the signs of the real part of the poles of its transfer function \$H(s)=\frac{N(s)}{D(s)}\$. For a rational ...
0
votes
1answer
37 views

Two phase latch max delay constraint [closed]

In this timing diagram, why am I not including tcpq, i.e. the latch clock to Q propagation delay?
0
votes
2answers
49 views

Question about a trigger input of a modern ARB/VSG (Vector Signal Generator)

Given a common setup: The green box is a PCB mainly consisting of a data acquisition device (ADC+RF frontend) which is controlled by a Spartan-6 FPGA. The ADC & FPGA use a clock from a Tektronix ...
2
votes
4answers
165 views

Maximum Clock Frequency

As an assignment for the HDL course I'm taking, I've to design an FIR Filter. The module consists of two a small combinational circuit which can be used to reset the module, another combinational part ...
0
votes
4answers
148 views

How to make a relay ON for few seconds after power goes OFF?

I want to make relay circuit that can remain ON if power is supplied but as soon power is cut off i want the relay to go OFF after few seconds atleast 10 sec.
0
votes
1answer
174 views

Calculating Phase/Time Delay induced by a 2-pole Bandpass filter? ie. Group Delay?

If you have a two-pole Butterworth bandpass filter described by a particular Q value (Q>0.5) and a resonant center frequency "f", is there any equation that will tell you the phase/time delay induced ...
2
votes
1answer
384 views

Lumped-element delay lines using LC circuit

I was told that the above circuit is used to delay signal. The time constant per element is t = sqrt(LC). The expression was provided by the book I'm reading, but it did not include how the time ...
0
votes
0answers
21 views

NE555 monostable timer circuit restart timer when trigger grounded in between [duplicate]

I had made an NE555 timer IC based delay circuit (monostable mode) which keeps output HIGH for 10 seconds when trigger pin is connected to ground momentarily. But what I want is if I ground trigger ...
7
votes
6answers
2k views

Delaying a TTL signal

I need to design a circuit to delay an input signal by a given amount of time (around a second, trimmable). The delay should be set through the use of passive components (resistors or capacitors). The ...
0
votes
2answers
357 views

Low pass filter [DELAY]

Ok guys, I can't understand a thing, why a low pass filter will delay only a signal with an high frequency?If I have a RC low pass filter, why the delayed band is only the band that has an high ...
0
votes
0answers
17 views

Switching timer delay, non accumulative

I am a real noob at this and I haven't been able to find my answer anywhere. I am trying to build a 555-timer that delays the switch of an input signal, both ways. When input goes high there should ...
0
votes
1answer
156 views

Group delay and phase delay of a filter

Maybe this question does not belong here but here, but since this webpage is for electric circuits in general and not for LTI systems that is why I post it here. I have to compute the group delay ...
0
votes
1answer
119 views

response / change time for BMP280

I am new to reading electronic datasheets. The BMP280 (https://www.amazon.com/Adafruit-BMP280-Barometric-Pressure-Altitude/dp/B013W0RR6Y) has this datasheet: https://cdn-shop.adafruit.com/datasheets/...
3
votes
3answers
187 views

Calculating R and C for schmitt trigger debouncer

I've been looking all over the internet to try to figure out the optimal values for R1, R2, and C but couldn't find info. I'm trying to ideally make a debouncer that will work with any button on the ...
0
votes
1answer
248 views

MCP2210 (Microchip) has delays between chip select to data, data to data

I am using MCP2210 in my project to communicate with a processor (TMS320F28377D from TI). For tests, I use SPI Terminal programm from microchip. However there are some issues. There are some ...
0
votes
4answers
271 views

RC Delay Ciruit for Pi power on

I am a bit electronically challenged and need to hold an input pin high for about 8-10 seconds. I am implementing this solution: https://github.com/NeonHorizon/lipopi/blob/master/README....
0
votes
0answers
147 views

Delay in the given circuit

at t=0 , a and b change from 0 to 1 and t = 1, a and b change from 1 to 0. what should be the output of f at t=2 ? (basically does the gate drop the current calculation if the input change within the ...
0
votes
0answers
195 views

555 Monostable when switch is held for a period of time

I have a problem with the 555 delay before turned-off. The problem is that I want the time cycle to start after the switch is released if it was held for a period of time. I found this circuit at "...
0
votes
2answers
168 views

how to get fractional delay in picmicrocontroller

i am using 4MHz clock for pic18f452. therefore, 250ns is 1 instruction cycle. is there any way to get a delay of 375ns? using timers, i cant define count in fractions. using inbuit delay function ...
0
votes
0answers
152 views

Is it possible to delay a counter?

This is my D - 0 Down counter using D-FFs. Currently, what would happen if I ran it would be that it starts counting down from 3. Upon counting down to F, this toggles the NAND gate, which resets it ...
0
votes
0answers
112 views

How to create a pulse using 555 when the push button is released (“dead man” switch)?

I want to make a "dead man" switch using 555, basically 555 will generate a pulse only when a push button is released (you push the button and nothing happens until it's released). Two days of ...
-3
votes
1answer
552 views

calculating propagation delay

We assume that every gate's delay is (microsecond). what is total propagation delay?
-1
votes
1answer
404 views

How to get more efficiency out of 555 timer + MOSFET?

I needed to build a delay circuit so I'm following this guide: http://www.learningaboutelectronics.com/Articles/555-timer-delay-before-turn-on-circuit.php Using this circuit, I get a delay of about 5 ...
0
votes
2answers
625 views

Ticks / nanosecond delay

On an STM32F103C8T6 (72MHz) I want to use a delay in range of 100's of nanosecond (to create a LED strip driver, WS2813B). Since HAL only provides a ms delay, I found at various places code to use ...
3
votes
4answers
434 views

Can I use resistors/capacitors to delay when a circuit turns on?

I switched some electronic candles to be powered by a power adapter instead of batteries but when I power them up I noticed they all now "flicker" (which is a feature) at the same rate probably ...
4
votes
2answers
97 views

DS1100L Why Would You Want a Delayed Signal?

In a circuit I am looking at, a frequency output is fed to a micro-controller for pulse counting and also goes to a DS1100L-25 (Timing Delay Element IC). The output (all five taps) of this IC goes to ...
0
votes
1answer
384 views

Power-on delay using NPN transistor

I'm looking for a small and simple 1-2 second power-on delay circuit which would power the bluetooth module (20mA @ 3.6V). I have tried to achieve this using 2n3904 transistor, few resistors and ...