METHOD FOR DIGITAL-TO-ANALOGUE CONVERSION Russian patent published in 2017 - IPC H03M1/66 H03M1/74 

FIELD: electricity.

SUBSTANCE: invention relates to digital to analog conversion and can be used in devices for conversion of digital code into analog voltage. The method is achieved due to that K switches are used with D^K_N…D^K₁ data inputs and A^K_M…A^K₁ address inputs, 2^M-1 contacts with reference voltages, as well as K-1 amplifiers and voltage adder, at which for the digital to analog conversion of the digital code X_l…X₁ 2m-1 of reference voltages are set which correspond to the combinations of high-order digits X_l…X_L-m+1 of the digital code X_L…X₁, at which the other digits X_L-m…X₁ are equal to "0", then the reference voltage contacts are connected in series to the data inputs D^K_N…D^K₂ of switches so that the contact with the highest voltage is connected to the higher data inputs D^K_N, of switches, the outputs K-1, …, 1 of switches are connected to amplifiers, which are set with the respective transmission ratios 1/2^m, 1/2^2M, …, 1/2^m(K-1), the output of the first switch, and also the outputs of amplifiers are connected with the voltage adder, then the input bus F_L…F₁ is divided into K groups of the contacts F^K_L…F^K_L-M+1, F^K-1_L-M…F^K-1_L-2m+1, …, F¹_M…F¹₁, groups of contacts, which are connected in series to address inputs of the switches K, K-1, …, 1 so that the contact of high-order digit of the digital code of the group is connected to high-order address input of respective switch.

EFFECT: invention improves the accuracy of the digital to analog conversion, reduces the number of terms of reference voltages, reduces the range of reference voltages.

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