公开(公告)号：JP2745433B2

公开(公告)日：1998-04-28

申请号：JP28455090

申请日：1990-10-24

Applicant: ST MICROELECTRONICS SRL

Inventor： PALARA SERGIO ,  PAPARO MARIO ,  PELLICANO' ROBERTO

IPC: G05F1/10 ,  G05F1/56 ,  G05F3/22 ,  H01F7/18 ,  H03K17/16 ,  H03K17/615

公开(公告)号：JPH03150612A

公开(公告)日：1991-06-27

申请号：JP28455090

申请日：1990-10-24

Applicant: ST MICROELECTRONICS SRL

Inventor： PALARA SERGIO ,  PAPARO MARIO ,  PELLICANO' ROBERTO

IPC: G05F1/10 ,  G05F1/56 ,  G05F3/22 ,  H01F7/18 ,  H03K17/16 ,  H03K17/615

Abstract: PURPOSE: To prevent a parasitic component from being triggered by supplying a current to the load so as to maintain the output voltage at a value almost equal to a reference voltage when the output voltage becomes lower than the reference voltage. CONSTITUTION: This circuit is provided with a comparator B for comparing the output voltage Vc with the predetermined reference voltage Vcif. Then, in the case that the output voltage Vc becomes lower than the reference voltage Vcif, the current is supplied to the load so as to maintain the output voltage at the value almost equal to the reference voltage Vcif. In such a manner, a negative voltage peak in the collector of a power unit is evaded and the operation of the control circuit is guaranteed. Thus, the parasitic component is prevented from being triggered.

公开(公告)号：DE69032552D1

公开(公告)日：1998-09-17

申请号：DE69032552

申请日：1990-10-18

Applicant: ST MICROELECTRONICS SRL

Inventor： PALARA SERGIO ,  PAPARO MARIO ,  PELLICANO' ROBERTO

IPC: G05F1/56 ,  G05F3/22 ,  G05F1/10 ,  H01F7/18 ,  H03K17/16 ,  H03K17/615

Abstract: The limiting circuit comprises a comparator (B), which makes the comparison between the output voltage (Vc) of the power device (T5, T6) and a predetermined reference voltage (Vrif). In the case wherein the output voltage (Vc) is just below the reference voltage (Vrif) the comparator (B) supplies a current to the load (L) suitable for preventing the output voltage from falling further below said reference voltage (Vrif).

公开(公告)号：IT1236627B

公开(公告)日：1993-03-25

申请号：IT2210489

申请日：1989-10-24

Applicant: ST MICROELECTRONICS SRL

Inventor： PALARA SERGIO ,  PAPARO MARIO ,  PELLICANO' ROBERTO

IPC: G05F1/56 ,  G05F3/22 ,  G05F1/10 ,  H01F7/18 ,  H03K17/16 ,  H03K17/615 ,  H02H ,  H01L

Abstract: The limiting circuit comprises a comparator (B), which makes the comparison between the output voltage (Vc) of the power device (T5, T6) and a predetermined reference voltage (Vrif). In the case wherein the output voltage (Vc) is just below the reference voltage (Vrif) the comparator (B) supplies a current to the load (L) suitable for preventing the output voltage from falling further below said reference voltage (Vrif).