Patent ID: 8954363
Filing Date: 2015-02-10
Classification: G06N,H03M

Abstract:
1. A digital-to-analogue converter, comprising: a set of several transistors of identical nominal geometrical characteristics but of dispersed current-voltage characteristics such that, when a constant gate-source voltage is applied to the different transistors, a current that is variable as a function of the dispersion circulates in the transistor, a digital look-up table having a digital input for receiving a word to be converted and a selection output for selecting from the set of transistors, as a function of the word to be converted, a transistor or a group of transistors supplying a current of desired value representing this word in analogue form, a current output supplying the current delivered by the selected transistor or group of transistors, all receiving a nominal gate-source voltage, and means for loading into the digital look-up table, at a determined address, a datum determining the selection of the transistor or of the group of transistors, as a function of real measured voltage-current characteristics of the different transistors of the set, to establish a look-up between words to be converted and current values obtained by the selection of the transistors, the look-up table being different from that which would be obtained if the transistors all had said nominal characteristics.