Thanks Sir HC for the help and information

I went to amazon to look for EE designer books which ones should i get or which ones did any of u guys have when u guys took your EE courses to know about EE designing for R&D

Yes decoupling is going for digital chips,clocks,switching,LFO ticking, thats all i can think of what else is decoupling for?

R&D designer:

basic EE designer should know:

1.) Decoupling

2.) Isolation of components to other components, traces are to close, magnetic fields to close,

a.) Not good isolation can cause oscillation frequency,ringing,noise, interference

3.) ground loops

4.) shielding- for interferences

5.) ? anything else please?

R&D designer math:

1.) Calculating the input and output impedances and wattage values for resistors

2.) using fourier transform math,fourier series math,laplace transform math

3.) What else do R&D EE designers use math formulas for please?