Texas Instruments Corporation

Paul Correia

Frederic Boutaud

Pierre Michel Carbou

Laurent Le Faucheur

Xavier Lefevre

Christian Ponte

A system comprising converter logic that introduces noise to a signal. The system also comprises amplifier logic that reduces a sound pressure associated with the noise by amplifying the signal prior to providing the signal to the converter logic and de-amplifying the signal after providing the signal to the converter logic.

Reducing sound pressure of noise

Device for monitoring the periodicity of the messages sent over a multiplexed data-transmission network, in particular of a motor vehicle, characterized in that it includes a memory ( ) for storing object messages which are received from the network and each have a value ( ) indicating the reception deadline of the message, local clock means ( ) which are synchronized by a periodic internal signal and continuously generate a local time-value signal, means ( ) for comparing each message-reception deadline value ( ) with the local time value and for generating an overdue signal when the value indicating the reception deadline of the message is less than or equal to the local time value, and means ( ) for generating a signal, intended for an external microcontroller ( ) and indicating that the message has not been received, on the basis of the overdue signal.

Device for monitoring the periodicity of the messages sent over a multiplexed transmission network with a can-type structure

This digital-analog conversion system comprises a digital modulator (1) having several quantification levels formed by a second order Delta-Sigma modulator and a digital-analog converter and switched capacitors filter set (3) whose law of progression between the different analog levels is independent of the absolute and relative values of the constituent components of the said assembly.

Digital-analog conversion system including a digital modulator having

This interpolative filter comprising N differentiating stages (4A-4N) constituting a section of low sampling frequency and N integrating stages (5A-5N) constituting a section of high sampling frequency is characterized in that is further comprises modulators (7A-7N) which are inserted into the string of integrators and which are intended to eliminate the increasing of the number of bits of the signal at each integration stage, and in that the said integrators are each included in a differentiation loop.

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Antibes, France

Paul Correia