Electronic digital logic circuitry – Interface – Current driving
Reexamination Certificate
2006-03-14
2006-03-14
Cho, James H. (Department: 2819)
Electronic digital logic circuitry
Interface
Current driving
C326S087000
Reexamination Certificate
active
07012450
ABSTRACT:
A low-voltage differential signal driver includes, in part, a current sourcing circuit, a current steering circuit, and a current sinking circuit. The current steering circuit steers the current generated by the current sourcing circuit in one of first and second directions to generate a positive or a negative differential output voltage. The steered current flows to the ground via the current sinking circuit. A voltage dividing circuit divides the differential output voltage so generated. A first voltage regulating circuit receives a first reference voltage and regulates the voltage of a node common to both the current steering circuit and the current sinking circuit. A second voltage regulating circuit receives a first voltage supply to regulate the voltage signal generated by the voltage dividing circuit. To track the on-resistance of the transistors disposed in the current steering circuitry, a replicating circuit receives the first voltage supply and generates the first reference voltage.
REFERENCES:
patent: 6111431 (2000-08-01), Estrada
patent: 6356141 (2002-03-01), Yamauchi
patent: 6603348 (2003-08-01), Preuss et al.
patent: 6900663 (2005-05-01), Roper et al.
Gurcan Hakan Ates
Okter Ismail
Oner Hakan
Cho James H.
Decicon, Inc.
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