Coded data generation or conversion – Analog to or from digital conversion – Increasing converter resolution
Reexamination Certificate
2005-09-27
2005-09-27
Mai, Lam T. (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Increasing converter resolution
C341S144000, C341S136000
Reexamination Certificate
active
06950047
ABSTRACT:
Method and apparatus for combining outputs of multiple DACs for increased bit resolution. A method for providing an increased bit resolution to a data converter operable to convert digital information to analog values. A first current Digital-to-Analog (IDAC) converter is controlled to provide current to a first output node, the first IDAC having a first current step size associated with the Least Significant Bit (LSB) thereof. A second IDAC is controlled to provide current to the first output node, the second IDAC having a second current step size associated with the LSB thereof that is smaller than the first current step size. The combination of the first and second IDACs increases the bit resolution of the first IDAC when driving the first output node with the second IDAC.
REFERENCES:
patent: 5574455 (1996-11-01), Hori et al.
patent: 6703956 (2004-03-01), Mueller et al.
patent: 6720898 (2004-04-01), Ostrem
patent: 6727834 (2004-04-01), Roberts et al.
patent: 6738006 (2004-05-01), Mercer et al.
Austin James Dub
Fernald Kenneth
Holberg Douglas
Piasecki Douglas
Howison & Arnott , L.L.P.
Mai Lam T.
Silicon Labs CP Inc.
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