公开(公告)号：DE69231613T2

公开(公告)日：2001-05-31

申请号：DE69231613

申请日：1992-05-22

Applicant: ST MICROELECTRONICS SRL

Inventor： NEBULONI DANIELA ,  FASSINA ANDREA

IPC: H03F1/00 ,  H03F1/30 ,  H03G1/04 ,  H03G3/34

公开(公告)号：DE69329489D1

公开(公告)日：2000-11-02

申请号：DE69329489

申请日：1993-02-24

Applicant: ST MICROELECTRONICS SRL

Inventor： BOTTI EDOARDO ,  FASSINA ANDREA ,  FERRARI PAOLO

IPC: H03F1/52

公开(公告)号：DE60037415T2

公开(公告)日：2008-12-04

申请号：DE60037415

申请日：2000-08-31

Applicant: ST MICROELECTRONICS SRL

Inventor： ADDUCI FRANCESCO ,  BONA CLAUDIO ,  FASSINA ANDREA

IPC: H03K3/356 ,  H03K17/10 ,  H03K19/003 ,  H03K19/007

公开(公告)号：DE69320974T2

公开(公告)日：1999-02-04

申请号：DE69320974

申请日：1993-12-31

Applicant: ST MICROELECTRONICS SRL

Inventor： TAVAZZANI CLAUDIO ,  FASSINA ANDREA ,  STEFANI FABRIZIO

IPC: H03F1/30 ,  H03F1/52

Abstract: Circuit for protection of an amplifier stage comprising circuit switching means (G) for turn-off of the stage and piloted through a logic gate OR (F) by a monostable (M), which generates upon arise of abnormal operating conditions turn-off command signals having a predetermined duration. A sensing circuit (B) upon persistence of abnormal conditions at start-up or during normal operation also sends turn-off signals through the logic gate OR (F) after enablement through a gate AND (H). The signals of any enablement at the logic gate AND arrive through a logic gate OR (C) from a window comparator (A) coupled with stage start-up members, from the monostable, and from the output of said logic gate AND (H) as a confirmation signal.

公开(公告)号：DE69320974D1

公开(公告)日：1998-10-15

申请号：DE69320974

申请日：1993-12-31

Applicant: ST MICROELECTRONICS SRL

Inventor： TAVAZZANI CLAUDIO ,  FASSINA ANDREA ,  STEFANI FABRIZIO

IPC: H03F1/30 ,  H03F1/52

Abstract: Circuit for protection of an amplifier stage comprising circuit switching means (G) for turn-off of the stage and piloted through a logic gate OR (F) by a monostable (M), which generates upon arise of abnormal operating conditions turn-off command signals having a predetermined duration. A sensing circuit (B) upon persistence of abnormal conditions at start-up or during normal operation also sends turn-off signals through the logic gate OR (F) after enablement through a gate AND (H). The signals of any enablement at the logic gate AND arrive through a logic gate OR (C) from a window comparator (A) coupled with stage start-up members, from the monostable, and from the output of said logic gate AND (H) as a confirmation signal.