Abstract: A device for supplying electric power to an electronic component, including a DC-to-DC converter able to operate using pulse width modulation with high states and low states, with an input and an output, the output being intended to supply power to the electrical component; and a protective circuit connected to the input of the DC-to-DC converter, with a storage capacitive component connected to a diode for protecting against polarity reversals. The protective circuit furthermore includes a bypass for bypassing the protective diode so as to allow the storage capacitive component to discharge during the low states of the pulse width modulation.

Abstract: The invention provides a device for driving the electrical power supply of at least one electronic circuit branch comprising at least one light source of an automotive vehicle. A converter circuit converts an input voltage VIN into a load voltage (or current) that is applied to said circuit branch, and control means are configured to control the converter circuit by means of a periodic PWM signal having a predetermined frequency f. The frequency f is adapted in real time and according to a disruption that is detected in the input voltage signal VIN in order to avoid any occurrence of flickering in the intensity of the luminous flux emitted by the light sources.

Abstract: A device for supplying electric power to an electronic component, including a DC-to-DC converter able to operate using pulse width modulation with high states and low states, with an input and an output, the output being intended to supply power to the electrical component; and a protective circuit connected to the input of the DC-to-DC converter, with a storage capacitive component connected to a diode for protecting against polarity reversals. The protective circuit furthermore includes a bypass for bypassing the protective diode so as to allow the storage capacitive component to discharge during the low states of the pulse width modulation.

Abstract: The invention provides a device for driving the electrical power supply of at least one electronic circuit branch comprising at least one light source of an automotive vehicle. A converter circuit converts an input voltage VIN into a load voltage (or current) that is applied to said circuit branch, and control means are configured to control the converter circuit by means of a periodic PWM signal having a predetermined frequency f. The frequency f is adapted in real time and according to a disruption that is detected in the input voltage signal VIN in order to avoid any occurrence of flickering in the intensity of the luminous flux emitted by the light sources.

Abstract: A PBX call discrimination system which provides voice, FAX, and data services utilizing one telephone number (DID) for each local line being serviced. The PBX connects incoming lines to local lines serviced by it. Each local line is identified by a DID received in a call setup message on the incoming line. The PBX stores information associating a voice call extension, a FAX line, and a modem line with each DID. The PBX identifies an incoming call as being a voice call, a FAX transmission, or a data transmission. The incoming call is connected to the FAX line associated with that DID if the incoming call is identified as a FAX transmission, and to the modem line associated with that DID if the incoming call is identified as a data transmission. FAX and modem servers can be connected to the PBX for directing FAX and data transmissions, respectively, to the intended called party. The routing information utilized by such servers is provided by the PBX.

Abstract: A cylinder head for internal combustion engines with compression ignition, is of the type having precombustion chambers, intake and exhaust ports, and valve guides and seats respectively associated with the cylinders of the engine. According to the invention, the precombustion chambers the exhaust ports and the valve seats of this cylinder head are entirely cast and inserted into this cylinder head during casting and without machining. Application is particularly to the manufacture of diesel engines with precombustion chambers.