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How to connect Ground Points in the circuit

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narithota

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24v 12v ground

Hay
I am facing grounding problems
In my application I am using 3.3vfor micro controller (DGND1), 5V for digital (DGND) & analog circuit (AGND), 12V proportional solenoids (12VGND) & 24V for Solenoids (24VGND)
I am getting these voltage from 5V, 12V, 24V SMPS
My doubt is how to connect all these ground points in the Circuit.
I got some information from the Internet; AGND & DGND can connect with Inductor
Please provide some information regarding the Ground connection.

Regards
Chandu
 

Re: Ground Point

Star ground is one approach.
Keep all grounds on the board seperate and join them at one point. That point should be where the common ground for the power supplies connects to the board.
All grounds meet at one point.
This should prevent high currents in the solenoid circuits from disrupting the lower current circuits.
 

Re: Ground Point

Agree. Use Star points.
One source point distributing to various components.

Perhaps a small 100nF capacitor might help to stabilize the ground.


Best Regards,
Siong Boon

MODERATOR - SIGNATURE LINKS ARE NOT ALLOWED
 

Re: Ground Point

Thanks for the reply

In my circuits I made 3.3V, 5V, 12V, 24V ground lines separately
I am planning to connect all separate grounds with main ground using 600 Ohms, 1500mA Ferrite Bead Chips to avoid the back flow current from other circuits. Here I have 5,12,24V power supplys, shall I connect all these Power supply grounds at single point, shall I call it as main ground.

Please provide some information or circuits related to mixed signal grounds.

Regards
Chandu
 

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