What is the proper way to ground this DC circuit?
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I have 3 components: dual +/- power supply, linear voltage regulator, and pre-amplifier. They are to be mounted in a aluminum box. The PSU is powered by a 24V DC bench supply. I am confused on where to ground each component with regards to the “common” ground of the PSU. The pre-amp is processing signal data, where as the LVR is simply stepping +12V down to +9V.
My first thought is to connect the PSU “common”, the GND of the pre-amp, and GND of LVR to a star ground mounted on the chassis. I don’t want to damage the PSU so I was hoping to get advice from more knowledgeable folks. Thank you!power-supplydcgroundingShareCiteEditFollowFlagasked 4 hours agoTristen Lee1 New contributor
- #Tristen Lee. Well the most important point is not to let the pre amp ground path crossing over the PSU or LVR ‘s ground path. The PSU is a tough guy, it would not be damaged the the pre amp. It would only make the pre amp noisy. – tlfong01 21 mins ago
- I always recommend this EDN article to the grounding newbies: (1) Properly ground your circuits – Ritchey & Knack, EDN 2017jan06 edn.com/properly-ground-your-circuits. Cheers. – tlfong01 17 mins ago
- Actually, bypassing or decoupling PSU is more important to pre amps. I always recommend noise ninjas the two part article by Robert Keim: (1) Clean Power for Every IC, Part 1: Understanding Bypass Capacitors – Robert Keim 2015sep21 allaboutcircuits.com/technical-articles/…. / to continue, … – tlfong01 48 secs ago Edit
- (2) Clean Power for Every IC, Part 2: Choosing and Using Your Bypass Capacitors – Robert Keim 2015sep27 allaboutcircuits.com/technical-articles/… (3) Reducing sound noise when recording with Pi – Rpi SE raspberrypi.stackexchange.com/questions/111426/…. Cheers. – tlfong01 16 secs ago Edit Delete
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