Method and apparatus for master/slave digital-to-analog...

Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion

Reexamination Certificate

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C341S144000

Reexamination Certificate

active

11141498

ABSTRACT:
Methods and apparatus are provided for improved digital-to-analog conversion. The disclosed digital-to-analog converter comprises a master digital-to-analog converter that generates a master analog value, and a slave digital-to-analog converter that generates a slave analog value that is based on the master analog value. The slave analog value can be, for example, substantially proportional to the master analog value. The master D/A converter can be varied during a coarse tuning mode, while the input to the slave D/A can be fixed, for example, to an approximately mid-range value until the master analog value satisfies one or more predefined conditions. Thereafter, during a fine tuning mode, the slave D/A converter can be varied, while the master D/A converter is fixed, so that the output Y is equal to a desired value (within a specified tolerance).

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patent: WO 2005/107078 (2005-05-01), None

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