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Ground plane under IC

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ashish.bagga

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hi ,

Why do we actually need a ground plane under an Integrated Circuit (IC)?

Is it effect the performance of crystal, when a ground plane is given under it ?
 

because it
1)absorbs heat and protect the circuit from overheating
2) Protects the circuit from environmental radiations
 

Ground and power planes in high-speed digital systems perform three critical
functions:
1- Provide stable reference voltages for exchanging digital signals
2-Distribute power to all logic devices
3-Control crosstalk between signals.

For more information,please refer to chapter 5 of "High Speed Digital Design (Johnson & Graham)".

Hope it helps

Regards,
abhi
 

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