Digital-to-analog converter having error correction

Details Digital-to-analog converter having error correction Digital-to-analog converter having error correction

2005-09-20

2005-09-20

Nguyen, John B (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S144000, C341S143000

Reexamination Certificate

active

06946983

ABSTRACT:
The values X(n) input to a current-steering digital-to-analog converter (49) are modified (41) before the actual conversion to compensate for conversion errors of the digital-to-analog converter. The input values are modified according to a model (43) of the digital-to-analog converter in which each output value of the digital-to-analog converter Y(n) is a sum of a desired value directly proportional to the respective input value and an error. The error is a product of the settled output value, i.e. the difference between the desired value and the previous output value Y(n−1) actually provided by the digital-to-analog converter, and a relative step error that is a function only of the respective input signal and is stored in a table. The relative step error can be a function also of the previous output signal and of the previous input signal. This model has a low complexity and is suitable for on-chip implementation.

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patent: 6404369 (2002-06-01), Sheen
patent: 1 033 817 (1998-01-01), None

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