Safran Electronics & Defense

Safran Helicopter Engines

Michael Montoya

Nicolas Marti

Nicolas Charrier

Stephen Langford

Eric Karniewicz

Rafaël Samson

Rafael Samson

Christophe Poilvet

An on-board computer includes a microprocessor chip with a lower face and an upper face, a chip carrier having an upper face on which the microprocessor chip is mounted, and a casing configured to discharge heat generated by the microprocessor chip in operation. An interposer is disposed between the upper face and the casing. The interposer diffuses the heat transmitted by the upper face of the microprocessor chip towards the casing. The interposer has an upper surface for heat exchange with the casing that is twice or more greater than the surface area of the upper face of the microprocessor chip. The interposer has on one or more sides a peripheral wedging rim coming into contact with a side wall of the chip carrier, and has no more than two peripheral wedging rims, in order to leave the other sides of the interposer free.

On-board computer with interposer on the microprocessor chip

The invention relates to: Control circuit () for an electrical device (), said control circuit () receiving as input a discrete electrical control signal (CMD), the control circuit () comprising a source () of voltage (&#xb1;V) configured so as to supply the circuit according to a negative or positive voltage; a switch () normally closed in the absence of any discrete electrical control signal (CMD) and configured so as to isolate the electrical device from the voltage source as a function of the electrical control signal (CMD), said switch being connected between the voltage source and the electrical device (); the switch () being sensitive to the discrete electrical control signal (CMD) for just one sense of voltage.

Electrical circuit for control of an electrical device with high integrity

The invention relates to an overspeed protection device of an aircraft engine.

Overspeed protection device of an aircraft engine

Growing community of inventors

Boulogne-Billancourt, France

Michael Montoya