Digital synthesizer of the nonlinear frequency modulation signals on simple fpga

Abstract

Features of the construction of tabular digital signal synthesizers using FPGA are considered. It is proposed to use a reversing adder for ROM addressing and install a controlled inverter before the DAC. This allows, on the basis of repeated use of the original signal recorded in ROM, to form a set of multi-segment signals with general nonlinear frequency modulation, a lower level of ACF side lobes and a large base value