... lờn cỏc van k tip Trong chu k ca in ỏp t vo mi van dn dũng khon 1/N chu k S chuyn mch dũng t van ny sang van khỏc ch din vi cỏc van cựng nhúm v c lp vi nhỏnh khỏc Nh vy nhúm K ni chung van no ... van no cú th dng nht thỡ van ú s m Cũn nhúm A núi chung van no õm nht s m Quy lut m van: - Cỏc van cựng nhúm m lch 1/3 chu k - Cỏc van cựng pha m lch 1/2 chu k - Cỏc van k tip m lch 1/6 chu k ... cung cp, ú cú m van cú katụt ni chung (cỏc van 1, 3, 5) to thnh cc dng ca in ỏp ngun; m van cú anụt chung (2, 4, 6) to thnh cc õm ca in ỏp chnh lu - Mi pha ca in ỏp ngun ni vi van, nhúm anụt...