公开(公告)号：US11275127B2

公开(公告)日：2022-03-15

申请号：US16715492

申请日：2019-12-16

Applicant: Allegro MicroSystems, LLC

Inventor： Jay M. Towne ,  Peter Tengstrand ,  Devon Fernandez

IPC: G01R33/00 ,  G01R35/00 ,  G01R33/02 ,  H03M3/00

Abstract: According to aspects of the disclosure, an apparatus is disclosed comprising: a controller; an analog-to-digital converter (ADC) coupled to the controller, the ADC including an input terminal for receiving a sensor signal from a transducer; and a diagnostic circuit coupled to the input terminal of the ADC and to the controller, the diagnostic circuit being configured to: generate a diagnostic signal that indicates whether a voltage at the input terminal of the ADC meets a first threshold, and provide the diagnostic signal to the controller, wherein the controller is configured to: receive a data sample from the ADC, detect whether the data sample meets a second threshold, and transition the apparatus into a safe state when: (i) the diagnostic signal indicates that the voltage at the input terminal does not meet the first threshold, and (ii) the data sample meets the second threshold.

公开(公告)号：US20210181268A1

公开(公告)日：2021-06-17

申请号：US16715492

申请日：2019-12-16

Applicant: Allegro MicroSystems, LLC

Inventor： Jay M. Towne ,  Peter Tengstrand ,  Devon Fernandez

IPC: G01R33/00 ,  H03M3/00 ,  G01R33/02 ,  G01R35/00

Abstract: According to aspects of the disclosure, an apparatus is disclosed comprising: a controller; an analog-to-digital converter (ADC) coupled to the controller, the ADC including an input terminal for receiving a sensor signal from a transducer; and a diagnostic circuit coupled to the input terminal of the ADC and to the controller, the diagnostic circuit being configured to: generate a diagnostic signal that indicates whether a voltage at the input terminal of the ADC meets a first threshold, and provide the diagnostic signal to the controller, wherein the controller is configured to: receive a data sample from the ADC, detect whether the data sample meets a second threshold, and transition the apparatus into a safe state when: (i) the diagnostic signal indicates that the voltage at the input terminal does not meet the first threshold, and (ii) the data sample meets the second threshold