Zero Ohms resistor on the Power Line
Am designing a PCB Board, in the schematics section at the power line, I added a Zero ohms resistor to VBUS power rail for cleaner power. Is adding this value of resistor a good practice at the power rail of a design, is there any tendency of the circuit not functioning as required?
Solution:Jump to solution
I place 0R resistors not for the sake of cleaner power but for the sake of the ability to separate circuits when debugging. I believe this is the common motivation for many engineers.
Yes, it's a good practice to place 0R resistors into circuits. Especially:
• At power supply inputs.
• At power supply outputs....
5 Replies
We need yoour help on this @Petr Dvořák, @Joseph Ogbonna
Solution
I place 0R resistors not for the sake of cleaner power but for the sake of the ability to separate circuits when debugging. I believe this is the common motivation for many engineers.
Yes, it's a good practice to place 0R resistors into circuits. Especially:
• At power supply inputs.
• At power supply outputs.
• At sensitive devices' inputs and outputs.
Again, the motivation is to keep a chance to comfortably separate circuits without cutting traces or scratching PCB anyhow.
What other component can i use to have a more cleaner power apart from capacitor.
Inductors and ferrite beads but only for devices with slow current consumption changes. Not ideal for MCUs etc. Ferrite bead and inductors can be useful for analogue electronics, most of the time.
Using Ferrite bead is a good solution but consider all the constraint.
Using capacitor is very much sufficient for these purposes, as i can see in the circuit two caps were added in Vin. It is OK for these application.