I understand the need to supply decoupling capacitors on every IC but I am curious if one should be placed from source pin to ground on a p-fet. It seems that when the p-fet is switched on it is going to jerk the powersupply if there is any significant load attached to it. What is common? I have attached my schematic and I am concerned about the need for caps on U4 and U5 (or should those be labeled with a Q perhaps?)
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