Roman Yu. P. RussiaSaratov Saratov State University, ul. Astrakhanskaya, 83, Saratov, 410012, Russia Студенткаyuliaro@mail.ru Author's articles PROPERTIES OF SYNCHRONIZATION IN THE SYSTEM OF NONIDENTICAL COUPLED VAN DER POL AND VAN DER POL – DUFFING OSCILLATORS. BROADBAND SYNCHRONIZATION