Electronic digital logic circuitry – Interface – Supply voltage level shifting
Reexamination Certificate
2005-01-25
2005-01-25
Tokar, Michael (Department: 2819)
Electronic digital logic circuitry
Interface
Supply voltage level shifting
C326S068000, C326S082000
Reexamination Certificate
active
06847230
ABSTRACT:
A method of implementing bi-directional level translation in an information handling system includes coupling a first device port via a first resistor to a first voltage. A second device port is coupled via a second resistor to a second voltage different from the first voltage. Lastly, a single bipolar junction transistor (BJT) couples the first device port to the second device port, the single bipolar junction transistor including an emitter coupled to the first device port, a base coupled via a third resistor to the first voltage, and a collector coupled to the second device port, wherein the bipolar junction transistor operates as a bi-directional level translator between the first and second device ports.
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Mallory Joseph D.
Vyssotski Nikolai V.
Dell Products L.P.
Haynes and Boone LLP
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