TY CONF TI COMPUTER SIMULATION OF POWER SUPPLY FOR LIGHT EMITTING DIODES WITH TWO CURRENT’S SOURCES KW switching power supply KW current key KW pulse width modulation KW imitation simulation KW spice macros JO CAD/EDA/SIMULATION IN MODERN ELECTRONICS 2021 AU Suraykin, A.I. AU Labutin, M.S. AU Kudryashov, A.D. AU Suraykin, A.A. PY 2021 PB Bryansk State Technical University