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Q&A

Posts tagged grounding

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66%
+2 −0
Q&A Shared ground path vs shared supply path

Hi. I am just getting into PCB design and I consistently see recommendations to never share return paths between signals. It seems this is to avoid noise due to the shared impedance of the return p...

1 answer  ·  posted 17d ago by Mh154‭  ·  last activity 16d ago by Olin Lathrop‭

Question PCB grounding noise pcb-layout return-path
50%
+2 −2
Q&A Weird grounding on a vintage hifi sideboard

I got a vintage ('64) hifi sideboard for Christmas! It's super awesome. However, I don't understand the grounding. It has two female inputs on the backside that are labeled as "Grounding". There w...

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

Question grounding hifi
71%
+3 −0
Q&A Is it always necessary to use the ground terminal of the oscilloscope probe?

Assume my oscilloscope is grounded, and the DUT is grounded as well (earth ground). I am using a standard 10 Mohm impedance 1:10 passive probe. So, the ground terminal of the probe is in fact con...

2 answers  ·  posted 4y ago by coquelicot‭  ·  edited 1y ago by Lorenzo Donati‭

Question grounding oscilloscope measurement
80%
+6 −0
Q&A Ground pour on outer layers on 4-layer PCB

I'm designing a board that contains a cortex-M4 mcu working at 120MHz, and an ethernet bus with a wiznet chip that communicates with SPI. The ethernet chip gives me a phy output that goes directly...

2 answers  ·  posted 2y ago by DeadMouse‭  ·  edited 1y ago by Lorenzo Donati‭

Question PCB grounding
70%
+5 −1
Q&A Minimizing Common Mode Radiation - Separating Grounds

There are various different methods to keep common mode currents off the cables, one of them being discussed on the site here and with Olin's decoupling caps post on StackExchange. Slight digressio...

1 answer  ·  posted 2y ago by 2kind‭  ·  last activity 2y ago by TonyStewart‭

Question EMC grounding EMI common-mode
66%
+4 −1
Q&A PCB ground planes with isolated voltage

I have designed a PCB that I need to work in which a microcontroller drives a 24 V brushed motor. The input power to the board is 24 V, this is then lowered to 5 V by a step down converter, and thi...

3 answers  ·  posted 3y ago by Alinik‭  ·  last activity 3y ago by KalleMP‭

Question PCB grounding pcb-layout ground-plane
81%
+7 −0
Q&A High Speed Design - Which grounding strategy to choose?

Although I have done multiple PCB designs which passed FCC and CE equivalents using the MCU's/Multiple MCU's, I have a doubt about how to approach the high speed design using FPGA SoC - main thing ...

1 answer  ·  posted 4y ago by 2kind‭  ·  last activity 4y ago by Olin Lathrop‭

Question grounding high-speed