How decap cells are used to remove ground bounce and power bounce?

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How decap cells are used to remove ground bounce and power bounce explain in detail?
 

decap cell

I heard about the Decap cells & some other special cells.. Where they are used & when?.

Can anyone explain about this?.
 

what are decap cells

Decap cells are basically capacitors used for decoupling.
The gates in a circuit consume most power (dynamic) only at the clock edges. No voltage source is perfect hence glitches are produced on the power line due to huge current draw at the clock edges.
Decap filler cells are small capacitors which are placed between vdd and ground all over the layout. all these small capacitors add up to a big capacitor between vdd and ground. This helps to smoothen out the glitches. Apart from decap fillers , decap macros are also placed in a big design to give additional decoupling.
 

de cap cells

Dear dude,

Decoupling capacitance is used to remove the ground bounce , which is induced due to I/0 buffers affecting the internal circuit.


Hope u know how ground bounce occurs , i have assumed as u know so only i have given the direct answer.

Santu
 

dcap cell

hi dude,

Decap calls r used to reduce the power bounce only (as i know).
decap cell contains Nmos Transisitors only just it acts like a reserviour .
this decap cell is charged to VDD if any power bounce occurs it gives the sufficient required voltage 4 the Cells which r placed after that Decap cell

Ground bounce is reduced by placing the more Ground I/O pads than Power pads

i dont know how it reduces the Ground bounce if any body knows explain it clearly
 

decap fillers

Hi santu explain how groundbounce occurs i need the explaination also
 

Re: DECAP CELLS

Nice article on decap.
**broken link removed**


Thanks
Teja
 
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    skiran4

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Re: DECAP CELLS

Hi,
pls refer the attached pdf. it may be useful.

HAK..
 
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    Amy25

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