Device for the generation of analog signals through digital-analog converters, especially for direct digital synthesis

Abstract From the Canadian patent

A device for the generation of analog signals by means of analog-digital converters comprises a block for the generation of words encoded on N bits and an analog-digital converter whose input is encoded on M bits M, being smaller than N. The device furthermore comprises a sigma-delta modulator, at the output of the first block the bus being separated into M, most significant bits reserved for the input of the analog-digital converter andN-M least significant bits that enter the sigma-delta modulator the output of, this modulator being an M-bit bus that is added to the M output bits of the word generation block by digital addition means M being smaller than N. Application especially to …