DEVICE FOR GENERATING ANALOG SIGNALS USING DIGITAL-TO-ANALOG CONVERTERS, PRIMARILY FOR DIRECT DIGITAL SYNTHESIS Russian patent published in 2003 - IPC

FIELD: generating analog signals using analog-to-digital converters. SUBSTANCE: device has unit for generating N-bit coded words, sigma-delta modulator connected to output bus of mentioned unit and divided into M more significant bits supplied with delay to input of digital-to-analog converter, and N M less significant bits arriving at sigma-delta modulator whose output is, essentially, M-bit bus whose output signal is added by means of digital adder to output M bits of word generating unit. Proposed device is designed for use in digital synthesizers. EFFECT: reduced nonlinearity effect of converters. 5 cl, 7 dwg