Electronic digital logic circuitry – Function of and – or – nand – nor – or not – Bipolar transistor
Reexamination Certificate
2006-08-29
2006-08-29
Tran, Anh Q. (Department: 2819)
Electronic digital logic circuitry
Function of and, or, nand, nor, or not
Bipolar transistor
C326S127000, C326S115000
Reexamination Certificate
active
07098697
ABSTRACT:
A circuit topology for high speed low voltage logic circuits is disclosed that reduces the number of levels of stacked active circuit elements from 3 to 2. Circuits providing a variety of logic functions are presented, including a latch, an exclusive OR gate, a combination XOR and latch, a multiplexer and a demultiplexer. Circuits built according to the principles of the invention have been operated at speeds of 40 GHz. The circuit topology can operate at supply voltages as low as 2V (for silicon or silicon-germanium based devices) and provide power saving of 25%–50% or more, depending on the logic function. In some embodiments, circuits comprising single ended or differential inputs can be provided.
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Kornegay Kevin
Kucharski Daniel
Cornell Research Foundation Inc.
Tran Anh Q.
Wall Marjama & Bilinski LLP
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