DIGITAL FREQUENCY SYNTHESISER Russian patent published in 2011 - IPC H03L7/18 

FIELD: physics.

SUBSTANCE: digital frequency synthesiser has a reference generator, two dividers with fixed division factor, an inverting adder, an inverter, two dividers with variable division factor, three low-pass filters, two controlled generators, two frequency-phase detectors and a microcontroller, as well as a digital potentiometer (31), and a voltage follower (32), a synchronism indicator (33), a switch (34), a first (35) and a second (36) voltage comparator.

EFFECT: high resolution and wider range when forming a fine frequency grid inside a given grid while retaining high speed of operation and purity of the spectrum of the output signal.

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