1. A device for electrotherapeutic effects on muscle and nerve tissue, containing a signal generator for generating alternating current of a certain frequency and amplitude, as well as at least two electrodes for loading the muscle and nerve tissue with this alternating current, while the signal generator periodically performs simultaneous modulation of frequency (f) and amplitude (A) in the phase of increasing frequency and in the phase of decreasing frequency, characterized in that the modulation in frequency (f) is carried out by the modulating frequency from the frequency d range from 0.1 Hz to 200 Hz, and the modulated frequency (carrier frequency) in the frequency range from 4 kHz to 32 kHz is changed by discrete quarter-tone steps, so that each quarter-tone step is offered at least twice during the modulation period, while the phase of the increasing frequency reduce in favor of the phase of the decreasing frequency to at least approximately zero. ! 2. The device according to claim 1, characterized in that the irritation threshold (1, 1 ') is defined as a threshold that crosses during the phase of increasing frequency from the range (2) above the threshold to range (3) below the threshold and when the phase of decreasing frequency from range (3) below the threshold to range (2) above the threshold relative to the threshold of irritation (1, 1 '). ! 3. The device according to claim 2, characterized in that the amplitude-frequency characteristic is regulated by the signal generator in such a way that it crosses the irritation threshold (1, 1 ') at an acute angle. ! 4. The device according to one of paragraphs. 1-3, characterized in that the frequency (f) and amplitude (A) are selected in proportion to each other. ! 5. The device according to one of paragraphs. 1-3, characterized in that we serve1. Устройство для электротерапевтического воздействия на мышечную и нервную ткань, содержащее генератор сигнала для генерирования переменного тока определенной частоты и
