Analogue-to-digital converter

Details Analogue-to-digital converter Analogue-to-digital converter

2007-02-13

2007-02-13

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S120000

Reexamination Certificate

active

11247021

ABSTRACT:
An analogue-to-digital converter includes a summing element for combining an analogue input signal of the analogue-to-digital converter with a feedback signal in order to generate a fault signal, a quantizer which has comparators for comparing the fault signal with reference voltages in order to generate a digital output signal, a digital-to-analogue converter for converting the digital output signal into the feedback signal, a control device for generating a control signal from the digital output signal in order to control the use of elements of the digital-to-analogue converter in such a way that mismatching of the elements is compensated, a random number generating device for generating random numbers which are used in the quantizer to interchange the assignment of the reference voltages to the comparators in order to eliminate an effect of offset voltages at inputs of the comparators, and a compensation device for generating a compensated control signal from the control signal as a function of the random numbers in order to compensate the interchanging of the assignment of the reference voltages.

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“10-Bit, 3mW Continuous-Time Sigma-Delat ADC for UMTS in a 0.12 μm CMOS Process”, Lukas Dörrer, Franz Kuttner, Andreas Wiesbauer, Antonio Di Giandomenica and Thomas Hartig, Proceedings of the 29thEuropean Solid-State Circuits Conference, 2003, ESSCIRC '03, Sep. 16-18, 2003, 5 pgs.

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