A quantum frequency standard is necessary to accurately measure the frequency of oscillations or generate oscillations with a time-stable frequency. An important functional node in the cesium atom frequency standard is the frequency synthesizer. The paper presents a new frequency synthesizer circuit based on the direct digital synthesis method. The advantages and disadvantages of the new signal synthesis method are considered in detail, the differences between this method and others are indicated. The description of the main nodes of the new synthesizer circuit is given. By increasing the bit depth of the accumulating adder, we achieved a reduction in the step of tuning the output frequency by several orders of magnitude. It is concluded that this method satisfies all the requirements for the parameters of frequency synthesizers.
$^1$St. Petersburg Polytechnic University of Peter the Great\
$^2$The Bonch-Bruevich Saint Petersburg State University of Telecommunications\
$^3$All-Russian Research Institute of Phytopathology\
$^4$Russian Institute of Navigation and Time
Science News of the Faculty of Physics, Lomonosov Moscow State University
This new information publication, which is intended to convey to the staff, students and graduate students, faculty colleagues and partners of the main achievements of scientists and scientific information on the events in the life of university physicists.