公开(公告)号：DE68924107T2

公开(公告)日：1996-11-28

申请号：DE68924107

申请日：1989-06-08

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： ZISA MICHELE ,  PALARA SERGIO

IPC: H02H9/04 ,  H03K17/06 ,  H03K17/0814 ,  H03K17/567 ,  H03K17/687 ,  H03K17/695 ,  H03K17/08

Abstract: The power device (2) has a power supply terminal (3), a load terminal (5) connected to earth by means of an inductive load (1) and a control terminal (6) connected to a circuit (7) with inlet (8) for an alternating control signal. Whenever the power device (2) is turned off, a switching element (10, 30) hitches the voltage of the control terminal (6) to that of the load terminal (5), which is forced to fall by the inductive load. There is provided a discharge circuit (2, 18, 19; 21, 22) of the inductive load (1), which includes means (18, 21) having a predetermined threshold which are fired when the voltage of the load terminal (5) falls down to said predetermined threshold.