公开(公告)号：US20160261255A1

公开(公告)日：2016-09-08

申请号：US15061715

申请日：2016-03-04

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Andrew Joseph Gardner ,  David McLean Dwelley

IPC: H03K5/153 ,  H03K5/24

CPC classification number: H03K5/153 ,  G01R19/0092 ,  G01R19/16519 ,  G01R19/16538 ,  G01R19/16552 ,  G01R19/16571 ,  H03K5/24

Abstract: A threshold detection circuit may sense when current between a power supply and a load reaches a current threshold level. The threshold detection circuit may include a transistor in series with the load; a feedback circuit that causes the voltage drop across the transistor to be constant while the transistor is conducting current between the power supply and the load; a constant current source that delivers a constant current into the load; and a comparator that indicates when the voltage drop across the transistor falls below a voltage threshold level.

Abstract translation: 阈值检测电路可以感测电源和负载之间的电流达到当前阈值水平。 阈值检测电路可以包括与负载串联的晶体管; 当晶体管在电源和负载之间传导电流时，使得晶体管两端的电压降恒定的反馈电路; 恒定电流源，将恒定电流输送到负载中; 以及指示晶体管两端的电压降何时低于电压阈值电平的比较器。