公开(公告)号：US20230140765A1

公开(公告)日：2023-05-04

申请号：US17967089

申请日：2022-10-17

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Leonardo PEDONE ,  Simone SCADUTO ,  Rossella GAUDIANO ,  Matteo BRIVIO ,  Matteo VENTURELLI

IPC: G01R31/317 ,  H03M1/78 ,  H03M1/74

Abstract: A digital-to-analog converter (DAC) includes a switching network and built-in-self-test (BIST) circuitry. The DAC, in operation, generates analog output signals in response to input codes of a set of input codes of the DAC. The BIST circuitry sequentially applies codes of a determined subset of codes of the set of input codes to test the plurality of switches. The determined subset of codes has fewer codes than the set of input codes. The BIST circuitry detects failures of switches of the plurality of switches based on responses of the DAC to the applied codes. In response to detecting a failure of a switch, the BIST generates a signal indicating a failure of the switching network.

公开(公告)号：US20230074929A1

公开(公告)日：2023-03-09

申请号：US17903753

申请日：2022-09-06

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Luigi SOLE ,  Rossella GAUDIANO ,  Marta CANTARINI ,  Nicola ERRICO ,  Antonio GIORDANO

IPC: G06F1/3206 ,  G06F1/3296

Abstract: A system basis chip is described. The system basis chip comprises a power supply circuit configured to receive an input voltage and generate a plurality of voltages, and a control circuit. Specifically, the power supply circuit is configured to selectively switch on a first and a second voltage of the voltages as a function of a control signal. The control circuit measures a resistance value of an external resistor connected to a terminal and selects one of a plurality of configurations as a function of the measured resistance value, wherein a first configuration indicates that said first voltage should be switched on before said second voltage and a second configuration indicates that said second voltage should be switched on before said first voltage. Accordingly, the control circuit may generate the control signal in order to switch on in sequence the first and the second voltage according to the selected configuration.