High frequency protection Circuitry

110

00:51:42

Okay, i tried, but i think it's gonna be more complicated than i previously thought. There should be a Schmitt trigger here for it to work reliably, with two thresholds. This is the basic concept but the most right side should probably be replaced with a schmitt trigger. Anyway I'm having a hard time tweaking this project, so for now I'll leave it at that. I'll try to further fix the problem, but no guarante. Moreover the time constants should be tweaked, but at such a high time frame i don't think I'll be able to do it with a time constant of 5s, but that's the final RCR chain's job

published 10 years ago

sherazahamad

10 years ago

Bro I need gsm signal jammer ckt diagram

thebugger

10 years ago

It's not so easy because you have to jam the whole gsm spectrum, because if your phone can't lock onto a given frequency, it's gonna shift to the next available. It's not as easy, plus it's illegal.

hurz

10 years ago

Normal way is to detect overload and not try to detect high frequencies.

thebugger

10 years ago

But doesn't overload occur after prolonged high frequency exposure. This does exactly that. Counts the cycles, and after a few subsequent high frequency ,,attacks'' it engages the protection circuitry. As I said, these circuit is new to me, I just did what i could. It seems to be working though. The only thing that needs to be changed is the time constants in the circuit

hurz

10 years ago

Overload is overload and have to be anyhow detected not only for high frequencies

thebugger

10 years ago

Well a typical overload will cause the output to distort and produce high frequency harmonics. Their amplitude may be enough to trigger the protection. Anyway this is specifically for HF protection. There are other types to protect the amp from overload, or from excessive current draw, when the output is short circuited. They're often voltage controlled while this is AC controlled

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