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laptop brick SMPS grounding question
laptop brick SMPS grounding question
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Old 24th January 2018, 05:36 PM   #11
scottjoplin is offline scottjoplin  Wales
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You say "often" but I'm struggling to think of a single one, unless I'm misunderstanding what you are saying, the signal reference has to go to a rail (0V) to complete the circuit, also, what is it referencing if it doesn't?
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Old 24th January 2018, 05:55 PM   #12
BeardyWan is online now BeardyWan
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say a cap comes off the signal path and goes to ground and you don't want to tie it to a rail
Or you want to put the drain of a fet to ground so as to minimize the impact of potential noise on the rail getting through due to poor ripple rejection on the active device.
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Old 24th January 2018, 06:10 PM   #13
russc is offline russc  England
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Audio Component Grounding and Interconnection - diyAudio
Audio Component Grounding and Interconnection
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Old 24th January 2018, 06:10 PM   #14
scottjoplin is offline scottjoplin  Wales
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What do you mean by ground? If you mean the 0V rail there is no problem connecting them there because it is a reference and the circuit functions taking it into account, for want on a better word, it's floating, like we are in space
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