公开(公告)号：US20020063573A1

公开(公告)日：2002-05-30

申请号：US09948144

申请日：2001-09-06

Applicant: STMicroelectronics S.r.I.

Inventor： Angelo Genova ,  Roberto Gariboldi ,  Aldo Novelli ,  Giulio Ricotti

IPC: G01R031/26

CPC classification number: G01R19/16519 ,  H02M2001/0009

Abstract: The device and method monitor the current delivered to a load through a power transistor including a sense transistor. The circuit includes a disturbances attenuating circuit that has a differential stage, and first, second and third stages referenced to ground, the respective input nodes of which are connected in common to an output node of the differential stage. The third stage is formed by a transistor identical to a transistor of the first stage and delivers a current signal through a current terminal thereof, proportional to the current being delivered to the load.

Abstract translation: 该装置和方法通过包括检测晶体管的功率晶体管来监测传送到负载的电流。 该电路包括具有差分级的干扰衰减电路，以及参考地的第一，第二和第三级，其各个输入节点共同连接到差分级的输出节点。 第三级由与第一级的晶体管相同的晶体管形成，并将电流信号通过其电流端与传递给负载的电流成比例。