公开(公告)号：US10969814B2

公开(公告)日：2021-04-06

申请号：US16420864

申请日：2019-05-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Frank Dornseifer ,  Matthias Arnold ,  Johannes Gerber

IPC: G05F3/16 ,  G05F3/08 ,  G05F3/30 ,  G01R31/40 ,  H03K5/24

Abstract: An integrated circuit is provided with a bandgap voltage reference circuit having a bandgap reference voltage output. A bandgap failure detection circuit is coupled to the bandgap reference voltage output. The bandgap failure detection forms a model value of the reference voltage from a first time, compares a present value of the reference voltage at a second time to the model value; and asserts a bandgap fail signal to indicate when the present value is less than the model value by a threshold value. The integrated circuit is reset by the bandgap fail signal. The detection circuit may be operated from a failsafe voltage domain that also allows a critical circuit to complete a pending operation during a reset.

公开(公告)号：US10345844B2

公开(公告)日：2019-07-09

申请号：US15427854

申请日：2017-02-08

Applicant: Texas Instruments Incorporated

Inventor： Frank Dornseifer ,  Matthias Arnold ,  Johannes Gerber

IPC: G05F3/16 ,  G05F3/08 ,  G05F3/30 ,  G01R31/40 ,  H03K5/24

Abstract: An integrated circuit is provided with a bandgap voltage reference circuit having a bandgap reference voltage output. A bandgap failure detection circuit is coupled to the bandgap reference voltage output. The bandgap failure detection forms a model value of the reference voltage from a first time, compares a present value of the reference voltage at a second time to the model value; and asserts a bandgap fail signal to indicate when the present value is less than the model value by a threshold value. The integrated circuit is reset by the bandgap fail signal. The detection circuit may be operated from a failsafe voltage domain that also allows a critical circuit to complete a pending operation during a reset.

公开(公告)号：US10234889B2

公开(公告)日：2019-03-19

申请号：US14950960

申请日：2015-11-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Matthias Arnold ,  Asif Qaiyum

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

Abstract: A proportional to absolute temperature (PTAT) generator, for example, generates a PTAT current (IPTAT) and a VBE (voltage base-to-emitter) in a first regulation loop. A voltage-to-current converter is operable to generate a complementary to absolute temperature current (ICTAT). The IPTAT and ICTAT are summed to obtain a zero temperature coefficient current (IZTC). One ICTAT and one resistor are used to generate the IZTC signal.

公开(公告)号：US09372496B2

公开(公告)日：2016-06-21

申请号：US14811896

申请日：2015-07-29

Applicant: Texas Instruments Incorporated

Inventor： Matthias Arnold

IPC: G05F3/16 ,  G05F3/26 ,  G05F3/30

CPC classification number: G05F3/267 ,  G05F3/16 ,  G05F3/30

Abstract: The invention relates to an electronic device with a bandgap reference generator including a first path with series connection of a first bipolar transistor, a first resistor and a second resistor, and a second path with series connection of a second bipolar transistor and a third resistor. The first and second paths are supplied current via a common node through a fourth resistor controlled by an amplifier sensing voltage drops within the first and second paths. A curvature compensation stage compensates for a variation of base emitter voltage of the bipolar transistors by drawing a compensation current from the common resistor node.

公开(公告)号：US20190278315A1

公开(公告)日：2019-09-12

申请号：US16420864

申请日：2019-05-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Frank Dornseifer ,  Matthias Arnold ,  Johannes Gerber

IPC: G05F3/16 ,  G05F3/30 ,  G05F3/08 ,  G01R31/40 ,  H03K5/24

Abstract: An integrated circuit is provided with a bandgap voltage reference circuit having a bandgap reference voltage output. A bandgap failure detection circuit is coupled to the bandgap reference voltage output. The bandgap failure detection forms a model value of the reference voltage from a first time, compares a present value of the reference voltage at a second time to the model value; and asserts a bandgap fail signal to indicate when the present value is less than the model value by a threshold value. The integrated circuit is reset by the bandgap fail signal. The detection circuit may be operated from a failsafe voltage domain that also allows a critical circuit to complete a pending operation during a reset.

公开(公告)号：US20150331439A1

公开(公告)日：2015-11-19

申请号：US14811896

申请日：2015-07-29

Applicant: Texas Instruments Incorporated

Inventor： Matthias Arnold

IPC: G05F3/26

CPC classification number: G05F3/267 ,  G05F3/16 ,  G05F3/30

Abstract: The invention relates to an electronic device with a bandgap reference generator including a first path with series connection of a first bipolar transistor, a first resistor and a second resistor, and a second path with series connection of a second bipolar transistor and a third resistor. The first and second paths are supplied current via a common node through a fourth resistor controlled by an amplifier sensing voltage drops within the first and second paths. A curvature compensation stage compensates for a variation of base emitter voltage of the bipolar transistors by drawing a compensation current from the common resistor node.

Abstract translation: 本发明涉及一种具有带隙参考发生器的电子设备，该带隙参考发生器包括具有第一双极晶体管，第一电阻器和第二电阻器的串联连接的第一路径以及具有第二双极晶体管和第三电阻器的串联连接的第二路径。 通过由放大器控制的第四电阻器经由公共节点向第一和第二路径提供电流，从而感测第一和第二路径内的电压降。 曲率补偿级通过从公共电阻节点绘制补偿电流来补偿双极晶体管的基极发射极电压的变化。