Abstract: An embodiment of a motor controller includes a motor driver and a signal conditioner. The motor driver is configured to generate a motor-coil drive signal having a first component at a first frequency, and the signal conditioner is coupled to the motor driver and is configured to alter the first component. For example, if the first component of the motor-coil drive signal causes the motor to audibly vibrate (e.g., “whine”), then the signal conditioner may alter the amplitude or phase of the first component to reduce the vibration noise to below a threshold level.

Abstract: A method may denoise a digital video signal produced by a photoelectric sensor as a matrix of pixel signals affected by both thermal noise and impulsive noise. The method may include estimating the noise level associated to the pixel signals, and filtering the pixel signals with an attenuation factor that is a function of the estimated noise level.

Abstract: A semiconductor structure including a substrate of semiconductor material of a first type of conductivity; a first semiconductor layer set in direct electrical contact with the substrate on a first side of the substrate; a second semiconductor layer set in direct electrical contact with the substrate on a second side of the substrate; a first active electronic device formed in the first semiconductor layer; and a second active electronic device formed in the second semiconductor layer.

Abstract: A method and a system for authenticating an electronic tag by a host communicating with this tag via a reader, including: calculating, on the tag side, a first digital signature using at least one first function shared by the tag and the reader, taking into account at least one first secret key known by the electronic tag and the reader only; transmitting the first signature to the reader; calculating, on the reader side, a second digital signal using at least one second function, different from the first function and shared by the reader and the host, taking the first signature into account; transmitting the second signature to the host; and checking, on the host side, the coherence between the second signature and a validation value calculated based on said second function and on a second secret key known by the host and by a single element selected from among the tag and the reader.

Abstract: A circuit includes a microprocessor, an MPEG decoder for decoding an image sequence, and a memory common to the microprocessor and to the decoder. The circuit also includes a circuit for evaluating a decoder delay, a control circuit for, if the decoder delay is greater than a predetermined level, granting the decoder a memory access priority, and otherwise, granting the microprocessor the memory access priority.

Abstract: In a method of teletext management, the data processing is separated into at least two tasks. A first task deals with the processing of the data from the rough extraction, and a second task carries out the rest of the data processing. The first task activates the second task by an interrupt with a priority lower than an interrupt activating the first task. The method thus enables the interruption of the second task to carry out a following first task, thus eliminating any timing drift that may cause the loss of the data packet coming from the rough extraction.

Abstract: An intelligent suction device, particularly for vacuum cleaners and the like, includes a fuzzy-logic controller for controlling the motor of a fan or turbine. The suction pressure is detected by at least one pressure sensor which feeds back its measurement, in a closed loop, to the controller.

Abstract: In integrated circuits, to modify the operation of the charge pumps or voltage step-up circuits, they are sent a variable frequency signal at the input with the aim of breaking the regularity of the pulse train that enters the charge pump. This limits the risks of entry into resonance and limits radiation at a given frequency. The variable frequency signal is typically produced by a logic circuit and by a main oscillator whose transmission of certain pulses is masked by the combined action of different masking signals. The duty cycle ratios of the masking signals are less than that of the signal from the main oscillator. Such duty cycle ratios are preferably produced following the passage of a signal to a lower frequency than that of the signal of the main oscillator in a circuit for the detection of high transitions.