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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
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.
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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
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.
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公开(公告)号：US12079019B2
公开(公告)日：2024-09-03
申请号：US17323924
申请日：2021-05-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Johannes Gerber , Asif Qaiyum , Fraj Gharib , Christian Josef Sichert , Ruediger Kuhn , Frank Dornseifer , Bernhard Wolfgang Ruck
IPC: G05F1/575
CPC classification number: G05F1/575
Abstract: A system includes a digital controller in a voltage regulator. The system also includes a passgate array including two or more passgate transistors, where the passgate array is configured to provide a load current to a load, and where the digital controller is configured to activate and deactivate each passgate transistor in the passgate array. The system also includes a feedback loop configured to provide an error signal to the digital controller, the error signal based on a difference between an output voltage of the voltage regulator and a programmed voltage for the voltage regulator. The digital controller is configured to activate or deactivate a passgate transistor based at least in part on the error signal. The digital controller is also configured to activate at least one passgate transistor and deactivate at least one passgate transistor responsive to a clock cycle.
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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
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.
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