DIGITAL SYNTHESIZER OF SINUSOIDAL SIGNALS Russian patent published in 1994 - IPC

FIELD: radio engineering. SUBSTANCE: digital synthesizer of sinusoidal signals has variable frequency generator, fixed frequency generator, change-over switch, first and second formers of controlling signals, unit of control over direction of count, reversible counter, buffer amplifier, permanent storage, digital-to-analog converter, polarity change-over switch, controlled low-pass filter, comparator and D flip-flop. D input of flip-flop is connected to its inversion output. EFFECT: increased reliability thanks to expulsion of some elements and to decrease of some functional couplings. 2 dwg