Abstract:
A voltage regulator includes a regulation MOS transistor and an amplifier providing an output for driving a gate of the regulation MOS transistor. The amplifier drives the gate based upon a difference between a reference voltage and a feedback voltage. The voltage regulator may further include a circuit for making the amplifier switch to a standby mode with low current consumption when the difference between the supply voltage and the output voltage of the regulator is below a first threshold. This is done while maintaining, at the gate of the regulation transistor, a voltage that keeps the regulation transistor on. The present invention is particularly applicable to the management of power supplies in portable telephones.
Abstract:
The device for the comparison of the levels of two input signals MI, PI includes a first comparator COMP1, the switching of the comparator being expressed by a change-over of the output OUT1 of the comparator from a first logic state into a second logic state, the change-over of the output OUT1 from one logic state null0null into the other state null1null being faster than the change-over in the other direction. The device also includes a second comparator COMP2 with an identical structure, to whose input the signals to be compared are applied invertedly so that the switching operations in the comparators are inverted. The output of each comparator is applied to an associated logic circuit 1, 2 capable of accelerating the inverse switching in the other comparator for a change in the output corresponding to the fastest change-over.
Abstract:
A device for the regeneration of a clock signal from an external serial bus includes a ring oscillator and counter. The ring oscillator provides n phases of a clock signal. Of these n phases, one phase is used as a reference and is applied to the counter. It is thus possible to count the number of entire reference clock signal periods between a first pulse and a second pulse received from the bus. In reading the state of the phases in the oscillator upon reception of the second pulse, a determination is made for a current phase corresponding to the phase delay between the reference clock signal and the second pulse of the bus. By using a regeneration device that also includes a ring oscillator and a counter, it is possible to regenerate the clock signal of the bus with high precision.
Abstract:
The process for fabricating a network of nanometric lines made of single-crystal silicon on an isolating substrate includes the production of a substrate comprising a silicon body having a lateral isolation defining a central part in the body. A recess is formed in the central part having a bottom wall made of dielectric material, a first pair of opposed parallel sidewalls made of dielectric material, and a second pair of opposed parallel sidewalls. At least one of the opposed parallel sidewalls of the second pair being formed from single-crystal silicon. The method further includes the epitaxial growth in the recess, from the sidewall made of single-crystal silicon of the recess, of an alternating network of parallel lines made of single-crystal SiGe alloy and of single-crystal silicon. Also, the lines made of single-crystal SiGe alloy are etched to form in the recess a network of parallel lines made of single-crystal silicon insulated from each other.
Abstract:
An interleaved analog to digital converter (“ADC”) includes a first ADC having an input for sampling an analog signal during a first time period, an output for providing a digital signal, and a power supply terminal for receiving a first power supply voltage, a second ADC having an input for sampling the analog signal during a second time period, an output for providing a digital signal, and a power supply terminal for receiving a second power supply voltage, a first skew estimator for estimating a skew value of the first ADC, a second skew estimator for estimating a skew value of the second ADC, and a comparator for comparing the skew values, adjusting the first power supply voltage in response to a first output value of the comparator, and adjusting the second power supply voltage in response to a second output value of the comparator.
Abstract:
The present disclosure is directed to a method that includes exposing a surface of a silicon substrate in a first region between first and second isolation trenches, etching the silicon substrate in the first region to form a recess between the first and second isolation trenches, and forming a base of a heterojunction bipolar transistor by selective epitaxial growth of a film comprising SiGe in the recess.
Abstract:
A method for loading a program, contained in at least a first memory, into a second memory accessible by an execution unit, in which the program is in a cyphered form in the first memory, a circuit for controlling the access to the second memory is configured from program initialization data, instructions of the program, and at least initialization data being decyphered to be transferred into the second memory after configuration of the circuit.
Abstract:
An integrated circuit may include at least one MOS transistor having a sigmoid response. The at least one MOS transistor may include a substrate, a source region, a drain region, a gate region, and insulating spacer regions on either side of the gate region. The substrate may include a first region situated under the gate region between the insulating spacer regions. At least one of the source and drain regions may be separated from the first region of the substrate by a second region of the substrate situated under an insulating spacer region, which may be of a same type of conductivity as the first region of the substrate.
Abstract:
A device for protecting a set of N nodes from electrostatic discharges, wherein N is greater than or equal to three, includes a set of N units respectively possessing N first terminals respectively connected to the N nodes and N second terminals connected together to form a common terminal. Each unit includes at least one MOS transistor including a parasitic transistor connected between a pair of the N nodes and configured, in the presence of a current pulse between the pair of nodes, to operate, at least temporarily, in a hybrid mode including MOS-type operation in a sub-threshold mode and operation of the bipolar transistor.
Abstract:
An image sensor arranged inside and on top of a semiconductor substrate, having a plurality of pixels, each including: a photosensitive area, a read area, and a storage area extending between the photosensitive area and the read area; at least one first insulated vertical electrode extending in the substrate between the photosensitive area and the storage area; and at least one second insulated vertical electrode extending in the substrate between the storage area and the read area.