Isolated level shifter

Details Isolated level shifter Isolated level shifter

2011-05-03

2011-05-03

Le, Don P (Department: 2819)

Electronic digital logic circuitry

Multifunctional or programmable

Having details of setting or programming of interconnections...

C326S068000, C326S081000

Reexamination Certificate

active

07936182

ABSTRACT:
An isolated level shifter base cell that is configurable as either an isolated HIGH level shifter or an isolated LOW level shifter based on changes to connection layers, e.g., metal-2 and/or via-1 layers, without adjusting lower layers, or base layers, that form the isolated level shifter base cell. Regardless of the configuration selected, the isolated level shifter base cell requires the same footprint and provides the same input-to-output path timing. Further, the isolated level shifter base cell is configurable as either a HIGH or LOW isolation cell, i.e., without level shifting, based on changes to the connection layers while again maintaining the same footprint and input-to-output path timing. The configuration of the described isolated level shifter base cell can be changed late in the integrated circuit design process without affecting integrated circuit base layers, without changing the integrated circuit footprint, and without introducing integrated circuit timing changes.

REFERENCES:
patent: 6087852 (2000-07-01), Briggs et al.
patent: 7397273 (2008-07-01), Ng et al.

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