公开(公告)号：EP1155337A1

公开(公告)日：2001-11-21

申请号：EP00982794.0

申请日：2000-12-07

申请人： Gelcore Company

发明人： GHANEM, Mohamed, Sherif

IPC分类号： G01R31/265

CPC分类号： H05B33/0854 ,  G01R31/2653 ,  Y10T307/593

摘要： A sensor circuit for detecting a current supplied to a non-linear light-emitting diode (LED) and for producing a current reading dependent on temperature. The sensor circuit comprises first and second serially interconnected resistors also connected in series with the LED, and a temperature-dependent impedance connected in parallel with one of the first and second resistors. At least a portion of the current through the LED flows through the sensor circuit to enable the first and second serially interconnected resistors and said temperature-dependent impedance to produce a variable voltage signal representative of the current through the LED and dependent on temperature.