manually connect Standard Cells

[field_catcher]

Hello,

I am using VSdir standcell to build a programmable divider for frequency synthesizer. The VCO clock is around 1GHz.

I constructed the schematic using symbols from the library. Now I need to layout the design (by which I mean connecting the standard cells as the cells are already laid out) . I have 2 choices: use Cadence First Encounter to automatically do it or just use the layout Editor to manually connect it.

As the frequency is not that low, I am afraid the auto rounter will degrade the performance, so I decide to manually connect those cells. Has anyone done this before? I have further questions to ask.



Thanks!

 

[bg21359]

if there is not too many cells, you surely can do the layout by yourself, which you can focus on good performance, small coupling noise, tight layout and etc.
You can do the layout hierachically, always check your layout for DRC rule, LVS and other checks.