Questions tagged [recovery]

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3
votes
3answers
513 views

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 ...
0
votes
1answer
40 views

reverse recovery current of 2 different diodes in series

Will the reverse recovery current that both diodes see be the super-position of both diodes' reverse recovery currents?
1
vote
1answer
37 views

Altium Designer Deleted schematics completely

I opened up Altium after a windows update, and received this error: ...
0
votes
1answer
46 views

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 ...
1
vote
0answers
753 views

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 ...
18
votes
2answers
3k views

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, ...
4
votes
1answer
806 views

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'm 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 ...
1
vote
2answers
111 views

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 ...
3
votes
2answers
2k views

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 ...