Schaltung zur Stabilisierung einer D/a-Umsetzerreferenzspannung

Details

Veröffentlichungs-Nr.

EP3182593

Aktenzeichen

EP15200700

Anmeldetag

17. Dezember 2015

Veröffentlichung

27. Februar 2019

Erteilung

27. Februar 2019

Rechtsraum

EP

IPC

H03M1/10// H03M1/46

Abstract

The present invention relates to a circuit (100) for stabilizing a voltage on a reference node comprising - a digital-to-analog converter (10), DAC, comprising an array of capacitors and arranged for receiving an input voltage (Vin) via an input node, a voltage (Vref,DAC) via a reference node and a DAC code (codeDAC) via a controller node, said DAC code indicating to which capacitors of the array said voltage (Vref,DAC) is to be applied, and for outputting a DAC output voltage (Vout), - a capacitive network on the reference node comprising a fixed capacitor (Cref) arranged to be precharged to an external reference voltage (Vref) and a variable capacitor (Caux) arranged to be precharged to an external auxiliary voltage (Vaux) and afterwards to be connected to the reference node, - a measurement block (40) arranged for measuring the actual voltage on the reference node, - a calibration block (50) arranged for being fed with the DAC code and the measured actual voltage and for determining an updated setting of the variable capacitor based on the DAC code and the measured actual voltage.

Anmelder

Firma

IMEC VZW

Land

🇧🇪 Belgien

Fachgebiete