Thomson Licensing

Nagra France Sas

Philippe Guillot

Philippe Marchand

Gérard Morizot

Philippe Launay

Xavier Guitton

Laurent Albanèse

Patrick Vigneron

Phillippe Marchand

The present disclosure relates to an electronic switch for simulating a mechanical rocker switch having a determined current-interrupting capacity, the electronic switch being configured to supply power to an electronic device using an input voltage, and comprises a tact switch for the generation of a control signal, a bistable circuit whose output state depends on said control signal, a switching circuit adapted to the opening and to the closing of a power supply line supplying power to the device, which device consumes a current less than or equal to said determined interrupting capacity, a memory circuit comprising a reservoir capacitor, the tact switch being configured to control opening and closing of the switching circuit and the memory circuit being adapted to the storage of an 'open' or a 'closed' mechanical position of the electronic switch for a predetermined duration according to the reservoir capacitor.

Electronic switch for simulating a mechanical rocker switch

The invention relates to switch mode power supply modules and items of equipment powered by these modules. The power supply module comprises circuits for cyclically interrupting the switching operation, during a so-called switching operation interruption phase, if the load current of the module is less than a current threshold value and sustaining the switching operation, during a so-called switching operation phase, if the load current is greater than the load current threshold value and circuits for ending the switching operation interruption phase if the power supply voltage of the item of equipment is greater than a voltage threshold value. The item of equipment powered by the module comprises a capacitive element able to store energy from the module during the switching operation phase and to release the energy stored between the output terminals of the power supply module when it receives an activation signal.

Switch mode power supply module having a hiccup mode and item of equipment powered by said module

Method for detecting a connection of a peripheral device to a communication interface of an electronic device and associated detection circuit; the communication interface comprising a voltage power line for the power supply of a peripheral device, a range of nominal operating voltage values being associated with the power line, the method being characterized in that it comprises steps of application of a nominal voltage comprised in the range of nominal operating voltage values to the power line, of withdrawal of the nominal operating voltage applied to the power line, of detection, on the power line, in the presence of a residual voltage less than a threshold value of the nominal voltage value, of a transient signal resulting from the connection of the peripheral device to the interface, and of application of the nominal voltage to the voltage power line, according to the transient signal detected.

USB peripheral device detection on an unpowered bus

The invention concerns a method and device for controlling the switching operation in a switch mode power supply module. The switch mode power supply module is intended to supply power to an item of equipment. The method comprises the steps of measuring, in the switch mode power supply module, the load current and comparing the measured load current with a predefined load current threshold value, and, cyclically interrupting the switching operation if the measured load current inside the device is less than the predefined load current threshold value.

Switch mode power supply module and associated hiccup control method

An electronic card is disclosed including circuits of the protected zone include at least one control circuit. The electronic card further includes another zone defining a non-protected environment; the circuits of this zone do not need to comply with the distance constraint. The communication between the circuits of the protected zone and the non-protected environment is carried out by a communication circuit allowing or not allowing the electrical signals to pass. The passage of the electrical signals in the communication circuit is conditioned by an electrical control signal sent by the control circuit. Also disclosed is a method allowing the control circuit to be blocked if the electrical status of the signal controlling the passage of the signals does not correspond to the status imposed by the control circuit.

Electronic board provided with security functions and method for ensuring electronic board security

A method for pairing a first element and a second element, wherein the first element and the second element form a first decoding system among a plurality of receiving decoding systems in a broadcasting network. Each receiving decoding system is adapted to descramble scrambled audiovisual information received over the broadcasting network. A first key unique in the broadcasting network is selected. A second key is determined according to the first key, such that a combination of the first key and the second key enables to decrypt broadcasted encrypted control data that is received to be decrypted by each receiving decoding system, the encrypted control data being identical for each receiving decoding system. The first key and the second key are assigned respectively to the first element and the second element.

Growing community of inventors

Bruz, France

Philippe Guillot