Questions tagged [time]
Time cannot be created, but it can be measured by using common references. The oscillation of the cesium atom, or a pulsar, can be used in our lifespan, but neither one is steady forever. We can create 'instances' of time with tuning forks and electronic oscillators. By creating them we define them in terms of 'increments' of time. Those deemed to be laboratory grade become our reference devices for measuring time and frequency, the reciprocal of time.
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Angular frequency of the given signal
From the given graph, we can see the time period is "2". So ω (angular frequency) will be 2π/2, which gives angular frequency as "π".
But the textbook solution says the angular ...
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How to calculate charge time of a solenoid
I am trying to design a very small solenoid with a very fast charge time. Working backwards from a charge time of approximately 500 μs, I want to see if it is possible to create solenoid to meet this ...
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How to calculate the attack and release time constants in this envelope detector circuit?
I found the following circuit online and I'm using it as part of a peak detector with adjustable attack and release times. Here's the diagram:
Before this stage, the signal is already processed by a ...
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GPS and time zone changes [closed]
(As it turns out from the comments this is really not an EE question, but a political question about adherence to timezones. I'm still going to leave this question up to show my ignorance)
Yesterday ...
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Dual time constant op amp integrator
Need a circuit for an op amp integrator with separate time constants for attack and decay. When the input is increasing in magnitude time constant should be relatively short ~ 10 ms. When input is ...
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PTP accuracy vs timestamping method
Is there an order of magnitude guesstimate on how accurate of a time sync a PTP capable device can achieve given its packet timestamping method? I have an FPGA COTS board with a standard/non-1588-...
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Need delay circuit to pull IC pin low for 10 seconds [closed]
For a RF project I use HT12D decoder. I have sensor with digital output. Whenever sensor value changes from low to high or high to low HT12Ds TE pin must be pulled low to enable transmission for 5-10 ...
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Timed 24 VDC automatic gate rams
I have a some electronic gate rams that are 24vdc. The customer has an access control system that sends a pulse to the ram controls to open, they time out and shut again. The client is wanting the ...
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Effect of external voltage on collision time/ Mobility constant
While studying velocity of a electron in a semiconductor under external bias we derived it something like this, $$v_d= a\ \tau + v_t,$$
where \$a\$ is the acceleration from external bias, \$\tau\$ is ...
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LTspice behavioral model: Use a computed variable name as time input
Trying to run a LTspice simulation with a parameter computed (time250) as an input to timedelay on apulse voltage source. Any help with syntax or ckt correction advice
get this error always
Voltage ...
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Time Constant Equalizer [closed]
I found a device made decades ago and long forgotten now. It was a simple device that compensated for the non-linearities produced by a moving magnet cartridge for audio. I am not a scientist just an ...
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How do digital watches steadily increment the internally stored time without fluctuations in speed while running other logic at the same time? [closed]
I'm not 100% sure if the right place to ask this is StackOverflow, Software Engineering, or here, but I'm going to guess here since this is related to hardware.
I was looking at my digital watch and ...
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Why do we add the positive clock skew to the minimum clock period?
Given the following circuit:
I was told that the minimum clock period would be the sum of the setup time plus the propagation delay plus the clock skew for a positive clock skew. I was wondering as ...
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Impedance for an equivalent circuit
In: Richard Reidl, N.O. Sokal & Laszlo Balogh (1990). A Novel Soft-Switching Full-Bridge DC/DC Converter: Analysis, Design Considerations, and Experimental Results at 1.5 kW, 100 kHz. IEEE ...
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How to properly calculate the run time of a battery using a power converter?
I want to buy a 12v 100ah lithium battery to power a 750 watts power converter that provides 120V.
I would like to know how many hours of energy will I have with this information. I tried some online ...
