Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [recovery]

9 questions
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Why did they use ultrafast diodes in a 50 or 60 Hz bridge?

This is again from an HP power supply (PSU). The incoming 230 V is rectified into 340 VDC and is fed to a switched-mode supply. The odd thing here is that the manual for that unit, HP6023A, has different diodes for CR1, CR3, and CR2, CR4. CR1 and…
AndersG
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What is a typical reverse recovery time for a Zener diode, or is reverse recovery time not applicable to Zener diodes?

A little background: I am trying to understand how Zener diodes respond to high voltage transients. I stumbled across discussions of reverse recovery time, and I'm curious how it applies specifically to Zeners. I understand that Zener diodes aren't…
SteevJobbs
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Recovery of transistor wired as diode

It's a simple question. What's the turn-off time of this "diode" and does it have a recovery time when turning off? Since the transistor does not get into saturation I think it should be the same as turning it off normally, so pretty fast. The…
bobflux
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Proper way to demonstrate reverse recovery time of a diode using SPICE simulation

After encountering a nice example from an answer of this question, I wanted to simulate the same circuit in LTspice to compare the reverse recovery times of two diodes 1N4148 and 1N4007 by a 5V 100kHz square wave source: If I don't verify/set…
user16307
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Altium Designer Deleted schematics completely

I opened up Altium after a windows update, and received this error: [Error] ADF4355-3.SchDoc Project ADF4355-3.SchDoc, could not be found and will be removed from the project. I saw another post that said to just add the file back in manually…
seacaptain
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Repairing an SSD using a soldering iron vs oven reflow?

I'm trying to recover data from a cheap kingspec ssd that stopped working some months ago. It is not recognized by the computer at all. I get some messages saying the computer is trying to connect to the sata link (ubuntu server) but it eventually…
Meruje
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EPROM memory - the theoretical possibility of recovering data from memory after erasing the exposure with ultraviolet light?

I have a small question. We have a EPROM memory. Is there a theoretical possibility of recovering data from memory after deleting with ultraviolet light? Is this theoretically possible? Or maybe it is impossible? Anyone can give a source/reference…
Aurelio
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How fast is a typical body diode of a modern MOSFET?

I would like to know how fast a typical body diode of a modern MOSFET is in terms of letting a voltage spike through. In the datasheets, only the reverse recovery is stated for blocking again, but nothing about how fast a forward transient can be.…
HansPeterLoft
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Does spice model saturation recovery of bipolar transistors?

When a bipolar transistor is driven into saturation, it builds up charge which slows the recovery time when it is switched off. What I would like to know is, how well is this behaviour captured in spice models? Does spice model this? If I pick any…
knick
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