Abstract: 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.

Abstract: 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.

Abstract: 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 (4) for storing object messages which are received from the network and each have a value (8) indicating the reception deadline of the message, local clock means (9) which are synchronized by a periodic internal signal and continuously generate a local time-value signal, means (13) for comparing each message-reception deadline value (21, 22, 23) 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 (15) for generating a signal, intended for an external microcontroller (5) and indicating that the message has not been received, on the basis of the overdue signal.

Abstract: An apparatus for deslagging a steam boiler includes a plurality of loop clusters of detonating cord, each including a plurality of loops arranged in a multi-directional pattern to impart a three-dimensional generally spheroid shaped to the cluster The clusters are supported in spaced apart relation between a pair of adjacent tubing panels and are interconnected by lengths of detonating cord to form an explosive assembly adapted for substantially simultaneous detonation. A plurality of explosive assemblies are arranged in approximately every third or fourth spread between tubing panels and are interconnected so as to pyrotechnically detonate each explosive assembly after a predetermined delay in response to detonation of another explosive assembly to which it is connected. The invention is further directed to the method of deslagging a steam boiler with the plurality of loop clusters of the invention.

Abstract: 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.

Abstract: 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.