DIGITAL-TO-ANALOG CONVERTER TRANSFER FUNCTION MODIFICATION

The present disclosure relates to a digital-to-analog converter (DAC) which includes a resistor string and a transfer function modification circuit. The transfer function modification circuit may be a calibration circuit for calibrating the DAC, The calibration circuit may include a plurality of cur...

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Bibliographic Details
Main Authors DEMPSEY, Dennis, s/O DING, Junbiao, LIU, Tony Yincai, O'DONNELL, John Jude
Format Patent
LanguageEnglish
French
German
Published 18.03.2020
Subjects
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRICITY
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Summary:The present disclosure relates to a digital-to-analog converter (DAC) which includes a resistor string and a transfer function modification circuit. The transfer function modification circuit may be a calibration circuit for calibrating the DAC, The calibration circuit may include a plurality of current sources, which may be current DACs. Each of the current DACS inject current into, or drain current from, a respective node of the resistor string, in order to correct for voltage errors. The injected currents may be positive or negative, depending on the voltage error. The current DACs are controlled by trim codes, which are set dependent on the measured or simulated voltage errors for a given resistor string.
Bibliography:Application Number: EP20190196474