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Posts by mohammadsdtmnd‭

7 posts
75%
+4 −0
Q&A Why arc welding does not require high voltage to arc?

I've heard that arc welding is getting done with low voltage. I believe arcing requires high voltage. Then how is arc welding done with about 50 volts? I thought we need kilovolts for arcing. Why? ...

3 answers  ·  posted 1y ago by mohammadsdtmnd‭  ·  last activity 12mo ago by TonyStewart‭

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Q&A Audio OpAmp requirements

As we know audio has high dynamic range. It means 120dB dynamic range of human ear causes to hear 1 million time samaller that highest undistorted accoustic wave. Then I think for high end audio we...

1 answer  ·  posted 1y ago by mohammadsdtmnd‭  ·  last activity 1y ago by Olin Lathrop‭

Question audio
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Q&A Pulse disappear in digital scope just by looking at different signal in other channel.

The problem was the transient you can see in the first picture, the blue one. When I connect the scope to it, it becomes stabilized. Otherwise it is noisy and because of this the other signal chang...

posted 1y ago by mohammadsdtmnd‭  ·  edited 8mo ago by Lorenzo Donati‭

Answer
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Q&A What is the role of master clock speed on DAC

In protocol I2S we have 3 signal + one none standard master clock(Mentioined by Olin Lathrop): 1.data 2.lrck/fck (frame synchronizer) 3.bck (bit clock) 4.mck/sck (master clock) Question 1: Why we...

2 answers  ·  posted 1y ago by mohammadsdtmnd‭  ·  last activity 12mo ago by mohammadsdtmnd‭

Question clock audio DAC
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Q&A Pulse disappear in digital scope just by looking at different signal in other channel.

I have a HANTEK 6022BE oscilloscope and I'm monitoring three signals with it: FS (Frame sync clock). Pulse. Transfer complete. I'm using two channels of the scope to monitor a pair of these...

1 answer  ·  posted 1y ago by mohammadsdtmnd‭  ·  last activity 8mo ago by Lorenzo Donati‭

Question oscilloscope
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Q&A What is the role of master clock speed on DAC

Question 4 solved: The datasheet lacks the information I've copied from PCM5122:

posted 12mo ago by mohammadsdtmnd‭

Answer
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Q&A Implementing local ground theory on PCB power distribution [closed]

I've tryed to implement a local ground concept told by Olin Latrop here : He have told: (What I've perceived)You should not connect every gnd point instantly to gnd plane, since it can inject HF ...

0 answers  ·  posted 1mo ago by mohammadsdtmnd‭  ·  closed 1mo ago by Olin Lathrop‭