DIGITAL-TO-ANALOGUE CONVERTER Russian patent published in 2018 - IPC H03M1/78 

FIELD: circuit design.

SUBSTANCE: invention relates to circuitry, automation, industrial electronics and analog-digital technology and can be used in devices for converting digital values into proportional analog values. Device contains a resistive matrix R-2R with a reverse connection of its input and output, a group of resistors, a reference voltage source, an operational amplifier with a feedback resistor, a source of two constant supply voltages of positive and negative polarity, terminals for connecting the parallel input digital code and the same control blocks of the resistive matrix, the number of which is equal to the number of digits in the parallel input digital code, each of which contains two operational amplifiers with a feedback resistor, four controllable switches and an inverter.

EFFECT: reducing the value of the component of the error of conversion.

1 cl, 1 dwg, 1 tbl