ANALOG-TO-DIGITAL CONVERTER Russian patent published in 1995 - IPC

FIELD: radio engineering. SUBSTANCE: device has two subtracters, two integrators, comparator, single-bit digital-to-analog converter, reference frequency unit and digital filter which contains single-bit and multiple-bits shift registers, three memory registers, read-only memory unit, adder of complex numbers, two subtracting counters, switch, pulse generator. Device generates high-rate sequence of binary signals which are calculated as sum of samples of source signal, quantization noise and indefinite aperture noise. Noises are suppressed in range of signal. Digital filter using complex coefficients at low quantization frequency provides calculation of multiple-bit samples of quadrature constituents of signal by accumulation of partial complex sum of productions of groups of binary samples and groups of complex coefficients. Filtration eliminates noise which is out of signal band and suppresses mirror reflection of signal spectrum. EFFECT: increased dynamic range. 2 cl, 4 dwg