Abstract:
A RAM memory integrated circuit, in particular a SRAM memory integrated circuit, includes a matrix of memory cells that are arranged between two bit lines via two access transistors. The bit lines are intended in one case to be discharged and in the other case to be maintained at a high precharge potential during a read operation. The bit line of each column of the matrix that is intended to be maintained at the high precharge potential is produced in the form of at least two partial bit lines. The memory cells of each column are implanted in the form of groups of cells which are alternately connected to one or the other of the partial bit lines, respectively.
Abstract:
A circuit of interface between a logic sensor and a logic input isolation barrier of a processing circuit, including an element of protection against input overvoltages, a current-limiting circuit connected in series between an input terminal and an output terminal of the interface circuit, and a control stage connected in parallel with the galvanic isolation element to be controlled to control the logic states thereof, the control stage inhibiting the operation of the galvanic isolation element if the input current is smaller than a predetermined threshold.
Abstract:
A circuit generates a reference voltage that is independent of temperature. The circuit is built on a substrate according to a CMOS technology, and includes a first stage for generating a first current proportional to temperature and a second stage for generating a second current inversely proportional to temperature. These first and second currents are summed in a resistor connected to a voltage distinct from the ground of the first and second stages and formed by the voltage of the substrate on which the circuit is built.
Abstract:
Artifacts of an incident digital image including pixels carrying information are reduced by determining, for certain pixels being considered from the image, displaced pixels. A displaced pixel associated with a pixel being considered is situated at a location that is displaced with respect to the location of the pixel being considered. Substitution information is determined by taking into account the variations between each piece of information carried by pixels situated at locations adjacent to the pixel being considered. The pixel being considered is then selectively replaced by a substitution pixel equal to the displaced pixel or to a combination of the displaced pixel and the pixel being considered, depending on the value of the substitution information.
Abstract:
A manufacturing process for a capacitor in an interconnection layer includes the following stages: Deposit of a first metallic layer (21); Deposit of a first insulator layer (31) on the first metallic layer (21); Deposit of a second metallic layer (41) on the first insulator layer (31); Formation of an upper electrode (4) in the second layer metallic (41); Deposit of a second insulator layer (13) covering the upper electrode (4); Etching of the second insulator layer to form a spacer (14) on this first insulator layer surrounding the upper electrode (4); then Formation of a lower electrode (2) and a dielectric (3) by removal of parts from the first metallic layer and insulator not covered by the upper electrode (4) or the spacer (14); and Formation of an interconnection line (5). This process allows for manufacturing capacitors with an increased performance, in a simplified fashion at lower cost and with an auto-alignment.
Abstract:
A process for producing a capacitor integrated into an electronic circuit comprises the formation of a trench in a substrate through a conductive portion similar to an MOS transistor gate. Alternating conductive, insulating and conductive layers are deposited inside the trench T in order to form a lower electrode, a dielectric and an upper electrode of the capacitor, respectively. The conductive portion is used to electrically connect the lower electrode to other electronic components of the circuit without an additional cost with respect to the connection of the circuit transistors.
Abstract:
The present invention relates to a memory in integrated circuit comprising a central Flash-type memory comprising memory cells forming pages, a buffer memory capable of storing binary words, and a sequencer for executing an instruction for saving, in a target page of the Flash memory, a series of external words received at an input terminal of the memory. According to the present invention, the sequencer is arranged for, after saving the series of external words in the buffer memory, saving, in the buffer memory, internal words present in the target page and corresponding, due to their address in the page, to locations of words in the buffer memory that have not received any external words, then erasing the target page and saving in the erased page the words present in the buffer memory.
Abstract:
The invention concerns a control circuit for an electron tube display comprising a deflection coil, the deflection coil being part of a scanning circuit and being coupled to a coil of a transformer powering a high voltage generator used to accelerate an electron beam, a phase locked loop being used to keep in phase the flyback pulses produced by the scanning circuit and the video signal synchronisation pulses, and comprising an electron beam current measuring circuit, a compensation circuit for compensating the phase difference between the flyback pulses and the video signal synchronisation pulses as a function of the measured current.
Abstract:
A thin wafer comprising through holes filled at least partially with conductive carbon nanotubes generally oriented transversally to the wafer. A fuel cell comprising, in a thin wafer, a through hole filled with an electrolyte surrounded with barriers of carbon nanotubes generally oriented transversally to the wafer.
Abstract:
A circuit for transmitting and receiving communications. The circuit includes a transmit block, a receive block, and an echo canceller, coupled to the transmit block and to the receive block, for determining an echo signal and subtracting it from the received signal, the determination of the echo signal involving a predetermined number N of coefficients calculated at the beginning of each of the communications in an initialization phase. The circuit periodically updates during communication a restricted group of coefficients chosen from among the most significant coefficients. The present invention also relates to an echo cancellation method.