Abstract:
Selon un aspect, il est proposé un procédé de détection d'au moins un objet (OBJ) dans une zone de détection (DET), comprenant : - une émission d'un rayonnement optique par des moyens d'émission (ME) d'un capteur temps de vol (CTV), - une réception par des moyens de réception (MR) du capteur temps de vol (CTV) d'une quantité de photons de rayonnement optique réfléchi par ledit au moins un objet (OBJ), - une mesure par des moyens de mesure (MM) du capteur temps de vol (CTV) d'une quantité de photons (SIGN) et d'une distance (DIST) entre ledit capteur temps de vol (CTV) et ledit au moins un objet (OBJ), et - une analyse de la quantité de photons détectés (SIGN) et de la distance (DIST) associée de façon à déterminer la présence d'au moins un objet (OBJ) dans une zone de détection (DET) du capteur temps de vol (CTV).
Abstract:
A processing system (10a) is described. The processing system comprises a three-state driver circuit (502) and a CAN FD Light controller (500). The CAN FD Light controller (500) is configured to sequentially transmit the bits of a CAN FD Light frame, wherein the CAN FD Light frame comprises a start-of-frame bit (SOF), a sequence of bits (CD-EOF) comprising in sequence a Cyclic Redundancy Check, CRC, delimiter bit (CD), an acknowledge bit (AS), an acknowledge delimiter bit (AD) and an End-of-Frame field (EOF) having 7 bits, and a plurality of intermediate bits (SID-CRC) between said start-of-frame bit (SOF) and said CRC delimiter bit (CD). In particular, the CAN FD Light controller (500) is configured to sequentially transmit the bits of the CAN FD Light frame via the three-state driver circuit (502) by using a push-pull configuration (CTRL1) when transmitting the start-of-frame bit (SOF) and the intermediate bits (SID-CRC). However, once having transmitted the intermediate bits (SID-CRC), the CAN FD Light controller (500) activates a high-impedance state (CTRL1) of the three-state driver circuit (502).
Abstract:
A current supply system for strings of solid-state light sources (34) is disclosed. The current supply system comprises a plurality of terminals (OUT1..OUTn), wherein each of the terminals (OUT1..OUTn) is configured to be connected via a respective current regulator or limiter (32) to a first output terminal of a voltage source (20) and via a respective string of solid-state light sources (34) to a second output terminal of the voltage source (20). A control circuit (40) is configured to generate a reference signal ( V ref ) for the voltage source (20), wherein the reference signal is indicative of a requested output voltage ( V out ) to be generated by the voltage source (20) between the first and the second output terminals of the voltage source (20). In particular, the control circuit (40) comprises: - a digital feed-forward control circuit (408, 410, 412) configured to compute a digital feed-forward regulation value ( V out_req ) indicative of a requested output voltage by determining a maximum voltage drop ( V LED_MAX ) at the strings of solid-state light sources (34), -a digital feed-back control circuit (414) configured to determine (1030) a minimum voltage drop ( V 32_MIN ) at the current regulators or limiters (32) and determine a digital feed-back correction value as a function of the minimum voltage drop ( V 32_MIN ), and - a control circuit (40) configured to set the reference signal ( V ref ) after a start-up as a function of the digital feed-forward regulation value ( V out_req ) and then correct the reference signal ( V ref ) as a function of the digital feed-back correction value.
Abstract:
A method of operating a CAN bus comprises coupling a first device (10) and second devices (20 1 , ..., 20 n ) to the CAN bus (30) via respective CAN transceiver circuits. The method comprises configuring the first device as a communication master device to transmit first messages carrying operation data message portions indicative of operations for implementation by the second devices, and second messages addressed to the second devices, the second messages conveying identifiers identifying respective ones of the second devices to which the second messages are addressed requesting respective reactions towards the first device within respective expected reaction intervals. The method comprises configuring the second devices as communication slave devices to receive the first messages transmitted from the first device, read respective operation data message portions in said operation data message portions and implement respective operations as a function of the respective operation data message portions read, and to receive the second messages transmitted from the first device and react thereon within said respective expected reaction intervals by transmitting reaction messages towards the first device. The method comprises configuring said respective CAN transceiver circuits to set the CAN bus to a recessive level during transmission of said messages via the CAN bus by the respective first device or second device.
Abstract:
The invention concerns a method of detecting an overcurrent in a triac (3), the method comprising: a) during at least part of a conduction phase of the triac, measuring the gate potential (V G ) of the triac; and b) comparing a value based on said measurement with a reference threshold and deducing the presence or the absence of an overcurrent based on said comparison.
Abstract:
A state machine for generating signals configured for generating different signals according to the current state (S0, S1, S2, S3, IDLE) of the machine. The state machine is configured to change state both as a function of an internal timer (Cmp(n)) and as a function of signals (Edge(x); Edge (y)) representative of events external to the state machine.