公开(公告)号：EP4254794A1

公开(公告)日：2023-10-04

申请号：EP23305371.9

申请日：2023-03-17

Applicant: STMicroelectronics (Rousset) SAS ,  STMicroelectronics S.r.l.

Inventor： ZOPPI, Giulio ,  ONDE, Vincent Pascal ,  ROMANO, Giuseppe

IPC: H03K5/125 ,  H03K5/1254

Abstract: A circuit (6) configured to debounce signals ( IN1 , IN2 ) produced by a quadrature encoder is disclosed. A first input node is configured to receive a first input signal ( IN1 ) and a second input node is configured to receive a second input signal ( IN2 ). The first input signal and the second input signal are in phase quadrature. An edge detector circuit (60) is configured to sense the first input signal and produce a pulsed signal ( E ) indicative of edges detected in the first input signal. A pulse skip and reset circuit (62) is configured to sense the pulsed signal and the second input signal, and produce a reset signal ( CLR ) indicative of pulses detected in the pulsed signal while the second input signal is de-asserted. A sampling circuit (64) is configured to sense the second input signal and the reset signal, and produce an output signal ( IN2 ') by de-asserting the output signal in response to assertion of the second input signal and asserting the output signal in response to a pulse being detected in the reset signal.