公开(公告)号：US20240356784A1

公开(公告)日：2024-10-24

申请号：US18639419

申请日：2024-04-18

Applicant: STMicroelectronics International N.V.

Inventor： Nicolas Moeneclaey ,  Gilles Troussel ,  Christophe Tourniol

IPC: H04L25/02 ,  H04L12/40

CPC classification number: H04L25/026 ,  H04L12/40013 ,  H04L25/0272 ,  H04L25/0292 ,  H04L2012/40215

Abstract: The present disclosure relates to device including first and second terminals connected to a bus, third and fourth terminals connected to power supply and reference potentials. A first transistor and a first resistor are in series between the first terminal and a first diode connected to the third terminal. A second resistor, a second transistor and a second diode are in series between the first and fourth terminals. A third transistor and a third resistor are in series between the first diode and the second terminal. A fourth resistor, a fourth transistor and a third diode are in series between the second and fourth terminals. At each consecutive transmission of a dominant bit and of a recessive bit, a circuit sets the transistors at the ON state during a time period starting with the recessive bit.

公开(公告)号：US11713998B2

公开(公告)日：2023-08-01

申请号：US17663915

申请日：2022-05-18

Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics International N.V.

Inventor： Nicolas Moeneclaey ,  Sri Ram Gupta ,  Sarika Kushwaha

IPC: G01J1/42 ,  G01J1/44

CPC classification number: G01J1/4204 ,  G01J1/44 ,  G01J2001/446

Abstract: According to one aspect, an ambient-light sensor includes a photodiode configured to generate an electrical signal according to an ambient light, a capacitive-feedback transimpedance amplifier connected at its input to the photodiode for receiving a signal generated by the photodiode and for generating as an output an amplified signal from the signal generated by the photodiode, and an auto-zero switch at the input of the capacitive-feedback transimpedance amplifier. The ambient-light sensor further includes a control circuit including a bootstrap circuit configured to receive an initial positive- or zero-voltage logic control signal, and then generate, from this initial logic control signal, an adapted logic control signal having a first positive voltage level and a second negative voltage control level for controlling the auto-zero switch.

公开(公告)号：US20250030577A1

公开(公告)日：2025-01-23

申请号：US18762760

申请日：2024-07-03

Applicant: STMicroelectronics International N.V.

Inventor： Nicolas Moeneclaey ,  Gilles Troussel ,  Christophe Tourniol

IPC: H04L12/40 ,  H02M7/219

Abstract: A device includes first and second terminals configured to be respectively connected to first and second conductors of a differential two-wire bus. First and second identical resistive dividing bridges are connected between a reference node and respectively first and second nodes. Third and fourth identical resistive dividing bridges are connected between a supply node and respectively the first and second nodes. A reading circuit is configured to determine a binary state of the bus from the currents flowing through transistors of the reading circuit.

公开(公告)号：US20220373388A1

公开(公告)日：2022-11-24

申请号：US17663915

申请日：2022-05-18

Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics International N.V.

Inventor： Nicolas Moeneclaey ,  Sri Ram Gupta ,  Sarika Kushwaha

IPC: G01J1/42 ,  G01J1/44

Abstract: According to one aspect, an ambient-light sensor includes a photodiode configured to generate an electrical signal according to an ambient light, a capacitive-feedback transimpedance amplifier connected at its input to the photodiode for receiving a signal generated by the photodiode and for generating as an output an amplified signal from the signal generated by the photodiode, and an auto-zero switch at the input of the capacitive-feedback transimpedance amplifier. The ambient-light sensor further includes a control circuit including a bootstrap circuit configured to receive an initial positive- or zero-voltage logic control signal, and then generate, from this initial logic control signal, an adapted logic control signal having a first positive voltage level and a second negative voltage control level for controlling the auto-zero switch.

公开(公告)号：US11855654B2

公开(公告)日：2023-12-26

申请号：US17707113

申请日：2022-03-29

Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics International N.V.

Inventor： Nicolas Moeneclaey ,  Sri Ram Gupta

IPC: H03M1/12 ,  H03M1/46

CPC classification number: H03M1/462 ,  H03M1/122 ,  H03M1/1245 ,  H03M1/468

Abstract: A successive approximation analog-to-digital converter includes a digital-to-analog converter DAC configured to receive a digital signal. First conversion units of the DAC are configured to sample an analog signal via a first switch and provide a first level voltage. Each first conversion unit includes a first capacitor array and a first switch array controlled from the digital signal. A single second conversion unit of the DAC is configured to provide a second level voltage. The second conversion unit includes a second capacitor array and a second switch array. A comparator operates to compare each of the first level voltages to the second level voltage and to provide a comparison signal based on each comparison and actuation of a set of third switches. A control circuit closes the first switches simultaneously and closes the third switches successively for the conversion of each sampled analog signal.