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[SOLVED] VDD and Lmin for GPDKs

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Ramakrishna_444

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what would be the VDD (Supply Voltage) for gpdk180, gpdk090 and gpdk045....?

Is VDD is a constant or can be varied over a range...?

What are the constraints to be taken into consideration for deciding VDD for a specific Technology...?

In gpdk090 the Lmin is 100 nm rather than 90 nm ... What would be the reason behind it...?

Please do enlighten me in this concern......

Thanks in advance.......
 

Ramakrishna_444 said:
what would be the VDD (Supply Voltage) for gpdk180, gpdk090 and gpdk045....?
Click to expand...
See here a table down to 70nm:
**broken link removed**
Vdd is the usual max. core voltage Vmax. For 45nm processes usually Vmax=0.8V , but some processes still allow for core voltage of 1.0-1.2V (using thicker Tox).

Ramakrishna_444 said:
Is VDD is a constant or can be varied over a range...?
Click to expand...
Usually over a range of Vmax ± 10% , often down to a lower voltage.

Ramakrishna_444 said:
What are the constraints to be taken into consideration for deciding VDD for a specific Technology...?
Click to expand...
The Vmax limit. Vmin may be lower, depending on circuit design and application requirements.

Ramakrishna_444 said:
In gpdk090 the Lmin is 100 nm rather than 90 nm ... What would be the reason behind it...?
Click to expand...
GPDK considerations, maybe used grid scale. Actual Lmin will anyway be fixed later during data prep for mask generation.
 

Thanks a lot for your reply erikl.......

But I'm unable to get the attachment...

Attachment 123173............
 

Ramakrishna_444 said:
... I'm unable to get the attachment...
Click to expand...

Sorry for that - I get it by clicking at it. Here it is again: process_size_and_its_parameters.png
 

Ramakrishna_444 said:
what would be the VDD (Supply Voltage) for gpdk180, gpdk090 and gpdk045....?
Click to expand...
Do you mean Cadence GPDK(Generic Process Design Kit) ?
If so, these are virtual process.

Read the followings.
"docs/gpdk180_referenceManual.pdf"
"docs/gpdk090_pdk_referenceManual.pdf"
"docs/gpdk045_pdk_referenceManual.pdf"
 

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Thanks a lot for your reply pancho_hideboo...............

Yes, Of course GPDKs are not Foundry Models ..................
 

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