公开(公告)号：US20130187628A1

公开(公告)日：2013-07-25

申请号：US13738546

申请日：2013-01-10

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Kenji FURUSAWA ,  Mitsuya FUKAZAWA

IPC: G05F3/16

CPC classification number: G05F3/16 ,  G05F3/30

Abstract: A reference voltage generating circuit with extremely low temperature dependence is provided.The reference voltage generating circuit includes a BGR circuit which generates a bandgap reference voltage; a bandgap current generating circuit which generates a bandgap current according to the bandgap reference voltage; a PTAT current generating circuit which generates a current proportional to the absolute temperature; and a linear approximate correction current generating circuit which compares the current generated by the PTAT current generating circuit and the bandgap current to generate a correction current, and the BGR circuit adds, to the bandgap reference voltage, a correction voltage generated based on the correction current.

公开(公告)号：US20150177770A1

公开(公告)日：2015-06-25

申请号：US14641272

申请日：2015-03-06

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Kenji FURUSAWA ,  Mitsuya FUKAZAWA

IPC: G05F3/16

CPC classification number: G05F3/16 ,  G05F3/30

Abstract: A reference voltage generating circuit with extremely low temperature dependence is provided. The reference voltage generating circuit includes a BGR circuit which generates a bandgap reference voltage; a bandgap current generating circuit which generates a bandgap current according to the bandgap reference voltage; a PTAT current generating circuit which generates a current proportional to the absolute temperature; and a linear approximate correction current generating circuit which compares the current generated by the PTAT current generating circuit and the bandgap current to generate a correction current, and the BGR circuit adds, to the bandgap reference voltage, a correction voltage generated based on the correction current.

Abstract translation: 提供了具有极低温度依赖性的参考电压发生电路。 参考电压产生电路包括产生带隙参考电压的BGR电路; 带隙电流产生电路，其根据带隙基准电压产生带隙电流; 产生与绝对温度成比例的电流的PTAT电流产生电路; 以及线性近似校正电流产生电路，其比较由PTAT电流产生电路产生的电流和带隙电流以产生校正电流，并且BGR电路将基于校正电流产生的校正电压加到带隙基准电压 。