Abstract:
A generator of random numbers by a flip-flop having a data input receiving a first signal at a first frequency comprised in a predetermined range and the instantaneous value of which is conditioned by a disturbing signal, and having a clock input receiving a second signal at a second predetermined frequency, smaller than the first one, said second signal passing through a delay element giving it a delay greater than or equal to the maximum period of the first signal.
Abstract:
A method and a system determine a score characteristic of the definition of a digital imageby cumulating the quadratic norm of horizontal and vertical gradients of luminance values of pixels of the image, the pixels being chosen at least according to a first maximum luminance threshold of other pixels in the concerned direction.
Abstract:
For instruction clusters for which no significant performance penalty is incurred, such as execution of hardware loops, a processor automatically and dynamically switches to a pipelined two-cycle access to an associated associative cache rather than a single-cycle access. An access involving more than one cycle uses less power because only the hit way within the cache memory is accessed rather than all ways within the indexed cache line. To maintain performance, the single-cycle cache access is utilized in all remaining instructions. In addition, where instruction clusters within a hardware loop fit entirely within a pre-fetch buffer, the cache sub-system is idled for any remaining iterations of the hardware loop to further reduce power consumption.
Abstract:
A memory circuit with an error correcting system comprising an address bus (102), an input data bus (108), and an output data bus (115), the circuit comprising a memory having an address bus (113), a data bus (114) and an error correcting circuit comprising an encoder (107). A first address register (104) is connected to the input address bus of the circuit for successively storing addresses corresponding to memory write operations only. A second data register (105) is connected to the input data bus of the circuit (108) for storing data transmitted to the encoder (107). Circuits make it possible to introduce a one-cycle shift into the memory writes, without modifying reads, giving the encoder more time to compute error correcting codes.
Abstract:
A sinusoidal frequency generator comprising an oscillation circuit controlled by a control voltage, characterized in that the oscillating circuit is a gyrator made up of two transconductance amplifiers whose bias points are fixed by the control voltage in order to regulate oscillation frequency. The gyrator is easy to integrated in a phase control loop in order to realize a square-to-sinusoidal frequency converter.
Abstract:
A method is provided for fabricating integrated electronic components. According to the method, an initial structure is produced on the surface of a first substrate. This initial structure incorporates a defined pattern formed from volumes of differentiated materials. At least part of the initial substrate that includes the defined pattern is transferred onto a second substrate, preferably by inverting the first substrate against the second substrate and then removing the first substrate. An additional structure is then produced on the second substrate. This additional structure includes volumes of material placed in correspondence with some of the volumes of differentiated material of the defined pattern. The electronic components thus produced may have a suitable configuration in accordance with technological or geometrical constraints. In a preferred method, a selective treatment is applied to the transferred part of the initial structure, so as to make a distinction between the volumes of differentiated material of the pattern.
Abstract:
A device is provided for synchronizing, on a reference clock signal, an exchange of data with a remote member. The device includes a main variable delay line controlled by a first processing unit coupled to a phase comparator in order to generate a delayed clock signal transmitted to the remote member. One input of the main variable delay line receives the reference clock signal. The device also includes a first terminal for receiving a clock signal image received by the remote member, a first auxiliary variable delay line having one input connected to the first terminal and one output connected to a first input of the phase comparator, a second auxiliary variable delay line having one input connected to the input of the main variable delay line and one output connected to a second input of the phase comparator, and a second processing unit controlling the first and second auxiliary variable delay lines so that the signal image received by the remote member is offset with respect to the reference clock signal, by a phase suitable for synchronizing the exchange of data on the reference clock signal.
Abstract:
A low noise differential amplifier structure comprising a first amplifier provided with an output stage with a Miller capacitor having a first electrode and a second electrode connected to the input and the output of the output stage, respectively. A second amplifier is provided with an output stage with a Miller capacitor having a first electrode and a second electrode connected to the input and the output of the output stage, respectively. The structure is characterized in that it comprises: at least a first trimming capacitor having a first electrode connected to the first electrode of the first Miller capacitor; at least a second trimming capacitor having a first electrode connected to the first electrode of the second Miller capacitor; and a cascode stage having an input receiving the output common mode voltage and an output connected to the second electrode of the first and second trimming capacitors.
Abstract:
A semiconductor package is provided that includes an electrical connection and support means having a front face and a recess in the front face. The semiconductor package also includes a semiconductor component having a front face including a sensor and a rear face which presses on the bottom of the recess of the electrical connection and support means. Further included in the semiconductor package is a positioning and locking means for locking the semiconductor component onto the electrical connection and support means. The positioning and locking means is engaged in a space which separates the periphery of the semiconductor component from the periphery of the recess and keeps the semiconductor component pressed against the bottom of the recess. Thus, there is provided a semiconductor package having efficiently oriented components.
Abstract:
An input stage for a video receiver includes a variable gain amplifier, an analog-to-digital converter for sampling a video signal and a digital processing unit for processing digital samples of the video signal. An analog regulating circuit sets an input potential at an input of the variable gain amplifier. A differential architecture is used for the variable gain amplifier and the digital analog converter. A conversion circuit between an input coupling capacitor and the variable gain amplifier allows generating the video signal on two channels in antiphase, which are centered on the common mode voltage. Such differential architecture allows reducing the amplitude of analog signals, which is particularly advantageous in the case of a low voltage supply delivering a few volts. In addition, linearity of the video signal processing is enhanced.