Abstract:
The invention concerns a system for delivering a voltage to at least one power domain (2.11-2. nz) comprising at least one component, each power domain functioning according to at least two operating points, each operating point defining a required supply voltage, the required supply voltages of the operating points of a given power domain being distinct in pairs. The system comprises at least a first and a second power supply units (1.10-1.n0), each supply unit being adapted to deliver a controllable supply voltage and the at least one power domain comprises at least one first power domain (2.1 x; 2.2y; 2.nz), which is arranged to be alternatively connected to the first or to the second power supply unit. The system further comprises a control unit (5) arranged to select, among the first and second power supply units, a current power supply unit to be connected to the first power domain, the current power supply unit being selected based on a current operating point of the first power domain, the control unit being further arranged to control the controllable supply voltage delivered by the current power supply unit to deliver the required voltage level associated with the current operating point of the first power domain.
Abstract:
A UE side Broadcast/Multicast Control (BMC) protocol layer determines those Cell Broadcast Service (CBS) messages (and their repetitions) which the UE shall read or ignore in a succeeding CBS schedule period, based on the CBS Schedule Message contents (Message Description Type and New Message Bitmap) received in a current CBS schedule period, the CBS messages already stored in the BMC, and the CBS messages to be received. In this manner, the UE may ignore CBS messages it has already received, without knowledge of the CBS message serial numbers, and thus conserve resources such as battery power.
Abstract:
A multi-mode, dynamic, DC-DC converter supplies a dynamically varying voltage, as required, from a battery to an RF power amplifier (PA). In envelope tracking mode, a fast DC-DC converter generates a dynamic voltage that varies based on the amplitude envelope of an RF signal, and regulates the voltage at the PA. A slow DC-DC converter generates a steady voltage and regulates the voltage across a link capacitor. The fast and slow converters are in parallel from the view of the PA, and the link capacitor is between the fast converter and the PA. Because different nodes are regulated, no current sharing is possible between the converters. The link capacitor boosts the dynamic voltage level, allowing a maximum dynamic voltage at the load to exceed the battery voltage. In power level tracking mode, the fast converter is disabled and the link capacitor is configured to be in parallel with the load. The slow converter directly regulates the PA, and the link capacitor is in parallel with (added to) an output capacitor. Multiple wireless network standards may be supported, allowing for the sharing of RF circuits.
Abstract:
A method is disclosed of indicating a suitable pose for a camera for obtaining a stereoscopic image, with the camera comprising an imaging sensor. The method comprises obtaining and storing a first image of a scene using the imaging sensor when the camera is in a first pose; moving the camera to a second pose; and obtaining a second image of the scene when the camera is in the second pose. One or more disparity vectors are determined, each disparity vector being determined between a feature identified within the first image and a corresponding feature identified in the second image. On the basis of the one or more disparity vectors, a determination is made of whether the second image of the scene is suitable for use, together with the first image, as a stereoscopic image pair.
Abstract:
The frequency response of a digital filter, such as a pre-emphasis filter in a signal transmitter having a phase-locked loop, is adjusted using interpolation of the filter coefficients, enabling sets of filter coefficients to be pre-computed or generated as needed in the transmitter. The phase error behavior of the digital filter can be significantly improved.
Abstract:
It is proposed a method for the projection of a sequence of images onto a projection surface by a handheld device having an embedded projector, the method including, for an input image to be projected of the sequence of images: a step of evaluation wherein a spatial position variation is evaluated with respect to a reference spatial position of the handheld device, and the spatial position variation is defined by a spatial orientation variation and a spatial vector variation, the spatial vector variation being determined by 3 independent coordinates, and at least one of the 3 independent coordinates is provided by a stereoscopic sensor; a step of compensation wherein a compensated image is generated from the input image to be projected depending on the spatial position variation; and a step of projecting onto the projection surface the compensated image.
Abstract:
A low-power-mode unit connected in parallel with a low-dropout regulator to provide a low-power mode includes a power P-MOS transistor, a differential amplifier, and an analog synchronization loop. The analog synchronization loop is configured to add a variable voltage offset depending on a total current at the output such that, in a high-power mode, the low-power unit current flowing through the P-MOS transistor is not zero, while being substantially smaller than the low-dropout regulator current flowing through the low-dropout regulator, and smaller than a predetermined value.
Abstract:
A resource management unit for a mobile telephone terminal, with the terminal comprising radio transmission/reception means for transmitting and receiving radio frequency signals corresponding to bursts of symbols during allocated time slots, and a device able to operate in a first mode and in a second mode, said device interfering less with the transmission/reception of radio frequency signals when it is in the first mode than when it is in the second mode. The resource management unit is able to cause the device to change from one of the first and second modes to the other of the first and second modes during the same time slot.
Abstract:
The frequency response of a digital filter, such as a pre-emphasis filter in a signal transmitter having a phase-locked loop, is adjusted using interpolation of the filter coefficients, enabling sets of filter coefficients to be pre-computed or generated as needed in the transmitter. The phase error behavior of the digital filter can be significantly improved.
Abstract:
A differential output stage of an amplification device, for driving a load, comprises a first and a second differential output stage portion. The first differential output stage portion comprises: a first and a second output circuit; a first driving circuit comprising a first biasing circuit; a second driving circuit comprising a second biasing circuit. The first differential output stage portion comprises: a third output circuit connected between a first node of said first biasing circuit and a first differential output terminal, having a third driving terminal connected to a first driving terminal; a fourth output circuit connected between a first node of the second biasing circuit and the first differential output terminal, having a fourth driving terminal connected to a second driving terminal.