Delay Definition and 185 Threads

Does anyone know why increasing the frequency of a RC circuit increases the phase delay in the capacitor's voltage (with respect to the voltage of the source)? I understand that the amplitude decreases because the impedance increases but I don't understand why the phase delay increases :S...

Nimtz and Stahlhofen claim that their recent tunnelling experiment proves that tunnelling time for light between double prisms is zero. In Herbert Winful's response to this (http://arxiv.org/ftp/arxiv/papers/0709/0709.2736.pdf) he explains that the evanescent wave formed in the gap only has real...

How is the Shapiro Delay interpreted in GR? Is it that the curvature of space is increased around a massive body causing the path length to increase? Or is it because time dilates making the speed of light appear to slow? Or something else?

Hello, Let me clarify my questions. Short version: When applying to graduate school, does the admission committee often look at which electives you have taken in your major? Do they dislike applicants who take electives that don't seem focus on one specific specialty in that major? Longer...

Hello All, I am working on a circuit that produces a three-phase output of digital pulses using a shift register and NOR Gate. the circuit, as it is now, works great with the delay between adjacent channels being less than 0.5 ns. But The three digital outputs of this circuit will be routed...

Homework Statement 1) I'm using a 4 bit carry lookahead adder to build a 8 bit parallel adder. I'm to calculate the maximum propagation delay time, assuming each gate introduces a unit time of propagation delay. I'm assuming not carry lookahead generators. Would it just be 8 units of...

Hi, I have a small piece of code that will detect a rising edge and output a pulse for 2 clock cycles. I'm only doing this for simulation purposes and will not be porting this into a FPGA. When using the after 10 ns after a statement, I know this is ignored during sythesis. How can I...

Hi, everyone. I am currently involved in a small electronics project and I am required to produce a time delay for part of the project. I plan on using the famous 555 timer and not quite sure on what to do to produce this delay.So please anyone help explain how to produce a time delay of,say...

Hi all.. I have been working on a project which involves the measurement of ignition delay of fuel droplets using optical sensors of the beam-break type. What my project supervisor has asked me to do is to fabricate an apparatus in which such measurements could be made. The basic principle...

I am concerned about getting the same length to all RAM chips (the output is equidistant to all inputs of the different chips) I heard somewhere that a rule of thumb is that you get .18 nanoseconds of time delay for every inch of tracing. Is this accurate? Is it safe to use this when...

Hello everyone. I am trying to measure the position of a magnet moving inside a steel tube using a magnetic sensor on the outside. Eddy currents are causing errors due to phase shifts and amplitude changes. Any ideas? Can eddy currents be re-directed using selective copper paths? Since eddy...

In August 2007 the MAGIC team caused controversy by posting a paper on arxiv that http://arxiv.org/abs/0708.2889 1. reported they thought they might have observed a 4 minute delay of the more energetic gammaray photons, compared with less energetic, from an Active Galactic Nucleus (AGN) flare...

Why is the group delay of a filter inversely proportional to the filter bandwidth? For example in a color TV transmitter the luma signal must be delayed with respect to the chrominance signal before they are added together because the luma signal has a larger bandwidth.

Can someone clear up what is observed in Shapiro time delay experiments. As I understand it a delay is seen in the round trip signal time of a radar signal sent to a distant planet on the opposite side of the sun due to gravitational effects. The signal path would be longer than the straight...

Hello All, I'm still working on my experimental control board and up to this point have been determining the best way to do the phase shifting of the input signal onto three output channels. After doing some experiments, I realized that a simple 120 degree phase shift between the three...

Hello, Are there any people who have ever dealt with Delay Differential Equations? Thanks;)

ASTROSTAT satellite of 2 meter diameter will be in space in 2007. If it revolves around the earthat an altitude of 800 Km, find the maximum delay in light arrival from Moon at the satellite at different locations. Is it as simple as adding 800km to distance of moon from Earth and dividing it...

I need to write a program that will create a constant time delay in x86 assembly, can anybody help?

Hey, I'm busy doing a project where we have to make the blackjack game. Now my problem is the time delay when they are dealing out the cards. As when we run the game, and click deal we see that both house and player have the cards already. Tried creatin my own delay with for loop, or using...

Is it true that a "high" input of a TTL gate shouldn't be left floating but instead connected to +Vcc through a pullup resistor because this way the propagation delay time is reduced and less noise is captured? If that's true, should a pullup resistor be used when connecting the input of a...

I have been doing some reading from the book Discrete Time Signal Processing by Oppenheim & Schafer (2nd Edition). In the book, I come across an IIR system (example 5.8 on p265) with transfer function: H(z)=1/[(1-r*e^(j*theta)*z^(-1))*(1-r*e^(-j*theta)*z^(-1))] The causal impulse response is...

I was wondering if there is a schematic or if anyone knows of a way to delay the send and/or the receive of a network cable. Preferable separate circuits. For example can I control how fast people on my network receive but not control the send. May be in the wrong place but i really need help...

I read (in W. Stallings "Data & Computer Communications") that Does that second sentence make sense? That seems to imply that if, for example, several signals of, say, 6 MHz bandwidth each are multiplexed in a cable, so maybe one signal is in a 1-7 MHz range, and another is at 10-16 MHz, and...

Has anyone else been following this story? http://www.indybay.org/news/2006/02/1803833.php More about it here: http://www.signonsandiego.com/news/state/20060221-9999-7n21morales.html

Hello. I'm wondering how to make a time delay of a few seconds using C++. The simplest way that came up to my mind is just to make loop for a few millions time or so, but the delay would change from computer to computer.

Interesting: Even the ultra-conservative talking heads are predicting that this Abramoff scandal will be huge. One must wonder about the timing of Delay's resignation which came at the request of other leading Republicans. And not only how wide, but just how deep this goes is still up for grabs...

For some reason I have trouble with questions like this. How would I get the phase difference if I were given the time delay of two loudspeakers side by side? I'll use this question as an example: "The speakers are now placed side by side. If the wire to speaker 1 is passed through a...

http://www.space.com/spacenews/businessmonday_051121.html" A $1 billion dollar cost growth on the mission is a lot, but considering the value and continuing contributions of Hubble to this very day, I think we can all agree that the JWST is a priority mission for NASA’s universe division...

confused! how do you calculate propagation delay of circuit and paths? Hello everyone, this book explains literally nothing about propgatation delay and how to calculate propagation delay of gates and the paths. And yet one of the questions says...

I'd run a book if I could here and ask you to all place your bets, but as it is, we may as well keep a record of our predictions and see who turns out to be right.

http://sfgate.com/cgi-bin/article.cgi?f=/n/a/2005/10/19/national/w112706D64.DTL I doubt we'll get a low-speed car chase, but at least we'll get mug shots. :smile:

[SOLVED] Tom DeLay: Indicted on conspiracy charges http://www.nytimes.com/aponline/national/AP-DeLay-Investigation.html?hp&ex=1127966400&en=2cf6902ed6f45124&ei=5094&partner=homepage Who's surprised? :-p

i need to solve an equation of the form (5) from this webpage http://chaos.phy.ohiou.edu/~thomas/chaos/mackey-glass.html first it asks to "derive the corresponding eigenvalue equation"- i presume they mean to derive (6)? if so, i don't know how they get it. and then they ask for something...

For some reason I have never come across this until my teacher brought it up in phil class last night. I have been searching for information and reading a little bit this morning about research on brain activity and conscious experience done by Benjamin Libet and neurosurgeon Bertram Feinstein...

How can I introduce a voltage controlled variable delay in the path of a mono-chromatic light beam? That is, how can I phase modulate the light? Thank you in advance for your input!