Abstract: The device (1) comprises a first roller (3) rotatable about a first rotation axis (3A) and a second roller (5) rotatable about a second rotation axis (5A), parallel to the first rotation axis (3A). The two are in mutual contact and define between them a yarn passage (7) and at least of them is motorized. The device further comprises 5 guide members (9) defining a feed path of at least a yarn (F; F1, F2, F3, F4), associated with the yarn passage (7) between the first roller (3) and the second roller (5). The guide members (9; 13) are movable with respect to the rollers (3, 5) in a direction substantially parallel to the first rotation axis (3A) and to the second rotation axis (5A), so as to take the yarn path temporarily outside the mutual contact 10 area between the rollers.

Abstract: An active flyback converter is transitioned between a plurality of operational states based on a comparison of a control voltage signal to voltage thresholds and a count of a number of consecutive switching cycles during which a clamp switch is kept off. The plurality of operational states includes a run state, an idle state, a first burst state, and a second burst state. Each set of consecutive switching cycles of the first burst state includes a determined number of switching cycles during which signals are generated to turn the power switch on and off and to maintain an off state of the clamp switch, and a switching cycle in a determined position in the set of switching cycles during which signals are sequentially generated to turn the power switch on, turn the power switch off, turn the clamp switch on and turn the clamp switch off.

Abstract: The device (1) comprises a first roller (3) rotatable about a first rotation axis (3A) and a second roller (5) rotatable about a second rotation axis (5A), parallel to the first rotation axis (3A). The two are in mutual contact and define between them a yarn passage (7) and at least of them is motorized. The device further comprises 5 guide members (9) defining a feed path of at least a yarn (F; F1, F2, F3, F4), associated with the yarn passage (7) between the first roller (3) and the second roller (5). The guide members (9; 13) are movable with respect to the rollers (3, 5) in a direction substantially parallel to the first rotation axis (3A) and to the second rotation axis (5A), so as to take the yarn path temporarily outside the mutual contact 10 area between the rollers.

Abstract: A method of transferring data in a processing system comprising a shared memory for storing data blocks, a plurality of processors, at least one of the processors having a cache memory for the data blocks, a plurality of data buses to each one at least one processor is connected, cross-bar for selectively connecting the data buses and the shared memory therebetween; the method comprises the steps of requesting the reading of a data block from the shared memory by a requesting processor, if the requested data block is present in modified form in the cache memory of an intervening processor, requesting an access to the corresponding data bus by the intervening processor, granting the access to the intervening processor, and to any other data bus available to the cross-bar, and sending the modified data block onto the data bus corresponding to the intervening processor and then onto the other data buses available.

Abstract: A method of transferring data in a processing system comprising a shared memory for storing data blocks, a plurality of processors, at least one of the processors having a cache memory for the data blocks, a plurality of data buses to each one at least one processor is connected, cross-bar means for selectively connecting the data buses and the shared memory therebetween; the method comprises the steps of requesting the reading of a data block from the shared memory by a requesting processor, if the requested data block is present in modified form in the cache memory of an intervening processor, requesting an access to the corresponding data bus by the intervening processor, granting the access to the intervening processor, granting an access to any other data bus available to the cross-bar means, logically connecting the data bus corresponding to the intervening processor with the other data buses available, and sending the modified data block onto the data bus corresponding to the intervening processor and

Abstract: A slave device, connected directly to a system bus, which system bus requests the execution of a complex communication protocol, is controlled by another device, connected to the system bus, which identifies the slave device as the target of a transaction on the system bus, executes the communication protocol and sends to the slave device through an auxiliary interface a first identification signal, a second signal for instructing execution of the transaction, and receives from the slave device, through the auxiliary interface, a transaction executed signal. In this way the interface logic of the slave device is reduced to the minimum since the slave device is not required to execute the communication protocol.