公开(公告)号：US20220417076A1

公开(公告)日：2022-12-29

申请号：US17845860

申请日：2022-06-21

Applicant: STMicroelectronics S.r.l.

Inventor： Valerio BENDOTTI ,  Nicola DE CAMPO ,  Carlo CURINA

IPC: H04L27/36 ,  H04L25/40 ,  H03K17/687 ,  H03K19/21 ,  H03K19/096

Abstract: A transmitter circuit receives a PWM input signal and a clock signal. A logic circuit generates a control signal as a function of the clock signal. The control signal is normally set to high, and is periodically set to low for a transmission time interval when an edge is detected in the clock signal. The transmission time interval is shorter than a half clock period of the clock signal. A tri-state transmitter receives the PWM input signal and the control signal, and produces first and a second output signals at first and second transmitter output nodes, respectively. The output signals have a voltage swing between a positive voltage and a reference voltage. An output control circuit is sensitive to the control signal and is coupled to the first and second transmitter output nodes.

公开(公告)号：US20240178835A1

公开(公告)日：2024-05-30

申请号：US18508011

申请日：2023-11-13

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Carlo CURINA ,  Valerio BENDOTTI

IPC: H03K17/605 ,  H03K3/037 ,  H03K5/133 ,  H03K19/096

CPC classification number: H03K17/605 ,  H03K3/037 ,  H03K5/133 ,  H03K19/096

Abstract: In an electronic device, a pulse generator receives an input signal and a clock signal and produces a transmission signal that includes a pulse following each edge of the input signal and of the clock signal. The pulse is low when the input signal is low and high when the input signal is high. A transmitter produces, at its two output nodes, a replica of the transmission signal and the complement of the transmission signal. A galvanic isolation barrier is coupled to the output nodes of the transmitter and produces a differential signal that includes a positive spike at each rising edge of the transmission signal and a negative spike at each falling edge of the transmission signal.