公开(公告)号：US11526191B2

公开(公告)日：2022-12-13

申请号：US16781549

申请日：2020-02-04

Applicant: Texas Instruments Incorporated

Inventor： Sreejish Sreenivasan ,  Mehedi Hassan ,  Tianhong Yang

IPC: G05F3/30 ,  H03M1/10 ,  G05F3/26 ,  G05F1/46

Abstract: An electronic device includes a precision reference circuit, which contains a bandgap reference circuit and an offset-correction circuit. The bandgap reference circuit has an output that is coupled to provide a bandgap reference voltage and an intermediate node that is separated from the output by a transimpedance resistor. The offset-correction circuit is coupled to the bandgap reference circuit and includes a DAC. The DAC is coupled to the intermediate node and is also coupled to receive an external digital value. The external digital value determines a fraction of a correction current that will be passed by the DAC.

公开(公告)号：US20210240213A1

公开(公告)日：2021-08-05

申请号：US16781549

申请日：2020-02-04

Applicant: Texas Instruments Incorporated

Inventor： Sreejish Sreenivasan ,  Mehedi Hassan ,  Tianhong Yang

IPC: G05F3/30 ,  H03M1/10

Abstract: An electronic device includes a precision reference circuit, which contains a bandgap reference circuit and an offset-correction circuit. The bandgap reference circuit has an output that is coupled to provide a bandgap reference voltage and an intermediate node that is separated from the output by a transimpedance resistor. The offset-correction circuit is coupled to the bandgap reference circuit and includes a DAC. The DAC is coupled to the intermediate node and is also coupled to receive an external digital value. The external digital value determines a fraction of a correction current that will be passed by the DAC.