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How to reject the ripple of supply?

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LAS.xs

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I am doing a design of voltage regulator. There is a big ripple in the supply of power that supplies for regulator. And it is not a small signal. How to reject it?
 

normally regulator need RC to stabilize, some even place C on board
 

LAS.xs said:
I am doing a design of voltage regulator. There is a big ripple in the supply of power that supplies for regulator. And it is not a small signal. How to reject it?
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add low pass filter.
 

Dear LAS.xs:

Please consider the structure, if the PSRR is bad of this structure,
please change the structure.

mpig
 

Capacitor in parallel to the power supply is required. Usually porarized capacitors with value in µF (4.7µF etc.) are put.
 

u can use zener diodes depends on voltage and ripple frequency
 

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