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Analog Ground -- bead.

B

blanko

Jan 1, 1970
0
Hey everyone,

In our last design when we bring in our battery ground we immediately
route it through a ferrite bead and this becomes our analog ground.
(AGND). Don't we want this ground connection to be our lowest
impedance point even at higher frequencies? If this is true would we
want to remove this bead and route directly to AGND?


Thank you for any insight!

-B
 
J

Joerg

Jan 1, 1970
0
blanko said:
Hey everyone,

In our last design when we bring in our battery ground we immediately
route it through a ferrite bead and this becomes our analog ground.
(AGND). Don't we want this ground connection to be our lowest
impedance point even at higher frequencies? If this is true would we
want to remove this bead and route directly to AGND?


Thank you for any insight!

In my 20+ years in industry I never had any reason to RF-isolate the GND
terminal of a battery. Did you get into EMI issues or what was the reason?
 
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