Coded data generation or conversion – Analog to or from digital conversion – With particular solid state devices
Reexamination Certificate
2007-09-29
2009-12-08
Barnie, Rexford N (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
With particular solid state devices
C341S144000
Reexamination Certificate
active
07629910
ABSTRACT:
Methods and apparatus to control current steering digital to analog converters are described herein. In one example, a digital to analog converter includes a first unit cell including a positive output and a negative output, wherein the positive output of the first unit cell and the negative output of the first unit cell comprise substantially equal magnitudes and wherein the positive and negative outputs of the first unit cell are substantially one hundred eighty degrees out of phase; and a second unit cell including a positive output and a negative output, wherein the positive output of the second unit cell is substantially zero when the negative output of the second unit cell is non-zero.
REFERENCES:
patent: 6930533 (2005-08-01), Budak et al.
patent: 7304595 (2007-12-01), Yamaoka
patent: 2004/0140830 (2004-07-01), Mulder et al.
patent: 2005/0225465 (2005-10-01), Zhang et al.
patent: 2008/0036536 (2008-02-01), Khorramabadi
Mathur Sumeet
Ramadoss Sriram
Barnie Rexford N
Brady III Wade J.
Lauture Joseph
Patti John J.
Telecky , Jr. Frederick J.
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