TY CONF TI DEVELOPMENT OF SPICE MODULE OF HV9931 CHIP FOR SIMULATION OF ELECTRONIC CIRCUITS KW PWM KW controller KW SPICE model KW HV9931 JO CAD/EDA/SIMULATION IN MODERN ELECTRONICS 2021 AU Klyamerov, K.P. AU Lysenkov, A.A. AU Amelin, S.A. PY 2021 PB Bryansk State Technical University