Patents Assigned to STMicroelectronics
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Publication number: 20120061849Abstract: A first component includes a slice formed from an integrated circuit chip having a front face and a rear face. An encapsulation block encapsulates the integrated circuit chip such that front and rear faces of the chip and front and rear faces of the encapsulation block are co-planar to form front and rear faces of the slice. Front and rear electrical connection networks are provided on the front and rear faces, respectively, with the electrical connection networks linked by electrical connection vias passing through the encapsulation block. A thermal transfer layer at least partially covers the rear face. A second component may be behind and at a distance from the first component. Connection elements interposed between the first component and the second component include both thermal connection elements in contact with the thermal transfer layer and electrical connection elements interconnecting the first and second components.Type: ApplicationFiled: September 12, 2011Publication date: March 15, 2012Applicant: STMICROELECTRONICS (GRENOBLE 2) SASInventors: Romain Coffy, Yann Guillou
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Publication number: 20120062313Abstract: A dynamic biasing circuit of the substrate of a MOS power transistor may include a first switch configured to connect the substrate to a current source which forward biases the intrinsic source-substrate diode of the transistor, when the gate voltage of the transistor turns the transistor on. The current source may include a stack of diodes in the same conduction direction as the intrinsic diode between the substrate and a supply voltage.Type: ApplicationFiled: September 14, 2011Publication date: March 15, 2012Applicant: STMicroelectronics SAInventors: Julien LE COZ, Alexandre Valentian, Philippe Flatresse, Sylvain Engels
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Publication number: 20120062288Abstract: Device for generating a signal of parametrizable frequency comprising a phase locked loop including a generator of a reference signal, a phase-frequency comparator comprising a first input for receiving the reference signal, an oscillator controlled on the basis of the result output by the phase-frequency comparator, a fractional divider coupled between an output of the oscillator and a second input of the phase-frequency comparator, and a selector selectively linking an input of the oscillator either with an input of the generator, or with the output of the oscillator as a function of the multiplication ratio of the fractional divider.Type: ApplicationFiled: September 9, 2011Publication date: March 15, 2012Applicants: Centre National de la Recherche Scientifique(CNRS), STMicroelectronics SAInventors: Didier Belot, Pierre-Olivier Lucas De Peslouan, Cédric Majek, Yann Deval, Thierry Taris, Jean-Baptiste Begueret
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Publication number: 20120062333Abstract: A distributed coupler including a first line intended to convey a radio signal between its two ends and a second line intended to sample, by coupling, part of the signal, wherein: one of the lines is formed on an insulating substrate; and the other line is formed in a lead frame supporting the substrate, one line being above the other.Type: ApplicationFiled: September 8, 2011Publication date: March 15, 2012Applicant: STMicroelectronics (Tours) SASInventors: Hilal Ezzeddine, Claire Laporte
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Publication number: 20120062268Abstract: Electromigration may cause a fault to appear in an integrated circuit located on a semiconductor chip. To detect such a fault, at least one resistive test structure is provided separated from the integrated circuit and located on at least one metallization level of the integrated circuit. During operation of the integrated circuit, the resistive test structure is sensed. Detection of a voltage difference between two points of the resistive test structure is indicative of a fault.Type: ApplicationFiled: September 13, 2011Publication date: March 15, 2012Applicants: STMICROELECTRONICS PVT LTD., STMICROELECTRONICS (CROLLES 2) SASInventors: Remy Chevallier, Vincent Huard, Neeraj Kapoor, Xavier Federspiel
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Publication number: 20120066571Abstract: A method of extraction of a key from a physical unclonable function exploiting the states of cells of a volatile memory after a powering on, wherein: cells are read according to addresses stored in a non-volatile memory; an error-correction code corrects the read states; and, in case an error has been corrected, the address of the cell providing an erroneous state is replaced in the non-volatile memory with that of another cell providing the non-erroneous state.Type: ApplicationFiled: August 29, 2011Publication date: March 15, 2012Applicant: STMicroelectronics (Rousset) SASInventor: Fabrice Marinet
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Publication number: 20120063446Abstract: In a 60 Hz WGA wireless network, not all frames with the duration field are received by a STA in a WGA network because of directional antennas. Therefore, a NAV Timer cannot account for the reserved duration of the channel by only updating with the longest duration field received. A STA can receive two frames each with a source and destination addresses and update the NAV Timer by comparing the received addresses to overcome such problem. Further, a STA can receive one frame with a source and destination addresses and update the NAV Timer by comparing the received addresses with the NAVSRC and NAVDST values.Type: ApplicationFiled: September 13, 2011Publication date: March 15, 2012Applicant: STMicroelectronics, Inc.Inventors: Liwen Chu, George Vlantis
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Patent number: 8134623Abstract: An image sensor has a per-column ADC arrangement including first and second capacitors for correlated double sampling, and a comparator circuit. The capacitors are continuously connected to, respectively, the analog pixel signal and a ramp signal without use of a hold operation. The comparator circuit comprises a differential amplifier having one input connected to the junction of the two capacitors and another input connected to a reference signal. The reference signal is preferably sampled and held from a reference voltage. The use of a differential amplifier as first stage of the comparator addresses problems arising from ground voltage bounce when a large pixel array images a scene with low contrast.Type: GrantFiled: March 11, 2009Date of Patent: March 13, 2012Assignee: STMicroelectronics (Research & Development) Ltd.Inventors: Matthew Purcell, Graeme Storm, Min Qu
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Patent number: 8134187Abstract: Integrated mask-programmable device, having a plurality of metal levels including a top metal level, a bottom metal level and a first intermediate metal level formed between the top and bottom metal levels, and a plurality of via levels arranged between the bottom and the first intermediate metal levels and between the first intermediate and the top metal levels and connecting each metal level to adjacent metal levels. The plurality of metal levels forms a first, a second and at least a third terminal, the top and bottom metal levels having at least two metal regions, and the first intermediate metal level having at least three metal regions. The first terminal is connected to third terminal or the second terminal is connected to the third terminal by modifying a single metal or via level.Type: GrantFiled: December 24, 2008Date of Patent: March 13, 2012Assignee: STMicroelectronics Design and Application s.r.o.Inventors: Patrik Vacula, Milos Vacula, Milan Lzicar
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Patent number: 8136023Abstract: A method for decoding tail-biting convolutional codes. The method includes initializing a correction depth, selecting a first starting state from a set of encoding states, and initializing a metric value for the selected starting state as zero and the other states as infinity. The input bit stream is read and a Search Depth Viterbi algorithm (SDVA) is performed to determine path metrics and identify a minimum-metric path. The ending state for the minimum-metric path is determined and the output for this ending state is identified as “previous output.” A second starting state is set to the ending state of the minimum-metric path, and symbols equal to the correction depth from the previous output are read. The SDVA is performed on the second set of read symbols to generate a corrected output. A decoded output is generated by replacing symbols at the beginning of the previous output with the corrected output.Type: GrantFiled: November 12, 2010Date of Patent: March 13, 2012Assignee: STMicroelectronics (Beijing) R&D Company Ltd.Inventors: Wuxian Shi, Juan Du, Yiqun Ge, Guobin Sun
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Patent number: 8134327Abstract: A method for measuring current in each phase of a three-phase inverter driven motor is based on the three-phase inverter being controlled in a PWM mode by three PWM signals including the use of a common DC-link current sensing resistor. The current on the sensing resistor is intermittently sampled. The method includes determining a modulation index for the voltage demand set by a motor controller. Based on specific mutual duty cycle conditions of the three PWM phase driving signals, sampling windows of sufficient duration are created for allowing distinct sampling of two of the phase currents.Type: GrantFiled: May 5, 2009Date of Patent: March 13, 2012Assignee: STMicroelectronics S.R.L.Inventor: Gianlugi Forte
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Patent number: 8134214Abstract: Electronic device which comprises a substrate provided with at least one passing opening, a MEMS device with function of differential sensor provided with a first and a second surface and of the type comprising at least one portion sensitive to chemical and/or physical variations of fluids present in correspondence with a first and a second opposed active surface thereof, the first surface of the MEMS device leaving the first active surface exposed and the second surface being provided with a further opening which exposes said second opposed active surface, the electronic device being characterized in that the first surface of the MEMS device faces the substrate and is spaced therefrom by a predetermined distance, the sensitive portion being aligned to the passing opening of the substrate, and in that it also comprises a protective package, which incorporates at least partially the MEMS device and the substrate so as to leave the first and second opposed active surfaces exposed respectively through the passinType: GrantFiled: July 24, 2009Date of Patent: March 13, 2012Assignee: STMicroelectronics S.r.l.Inventors: Lorenzo Baldo, Chantal Combi, Mario Francesco Cortese
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Patent number: 8134339Abstract: A method and integrated circuit for preserving a battery's charge and protecting electrical devices is disclosed. A maximum and a minimum battery voltage value at the output port are stored in a memory. A steady state battery voltage at the output port is measured and stored in the memory. A processor compares the measured steady battery voltage value to the maximum and the minimum battery voltage values. If the measured steady state battery voltage value is greater than the maximum battery voltage value, an over voltage state is reported by the processor. If the measured steady state battery voltage value is less than the minimum battery voltage value, a low battery voltage state is reported by the processor.Type: GrantFiled: February 28, 2008Date of Patent: March 13, 2012Assignee: STMicroelectronics, Inc.Inventors: Gary Joseph Burlak, Marian Mirowski
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Patent number: 8135129Abstract: A method and a circuit for protecting a numerical quantity contained in an integrated circuit on a first number of bits, in a modular exponentiation computing of a data by the numerical quantity, including: selecting at least one second number included between the unit and said first number minus two; dividing the numerical quantity into at least two parts, a first part including, from the bit of rank null, a number of bits equal to the second number, a second part including the remaining bits; for each part of the quantity, computing a first modular exponentiation of said data by the part concerned and a second modular exponentiation of the result of the first by the FIG. 2 exponentiated to the power of the rank of the first bit of the part concerned; and computing the product of the results of the first and second modular exponentiations.Type: GrantFiled: June 14, 2006Date of Patent: March 13, 2012Assignee: STMicroelectronics S.A.Inventors: Yannick Teglia, Pierre-Yvan Liardet, Alain Pomet
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Patent number: 8135851Abstract: A processing system includes a plurality of processing resources capable of executing a plurality of objects. The objects include a client object and one or more server objects. The client object is capable of requesting a service provided by at least one of the one or more server objects. The processing system also includes a hardware object request broker capable of receiving one or more messages from the processing resource executing the client object and communicating the one or more messages to the processing resource executing at least one of the one or more server objects that provides the requested service. The one or more messages are capable of invoking the requested service.Type: GrantFiled: October 21, 2004Date of Patent: March 13, 2012Assignee: STMicroelectronics, Inc.Inventors: Charles E. Pilkington, Michel Langevin
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Publication number: 20120056281Abstract: A method that includes forming an opening between at least one first electrode and a second electrode by forming a recess in a first electrode layer, the recess having sidewalls that correspond to a surface of the at least one first electrode, forming a first sacrificial layer on the sidewalls of the recess, the first sacrificial layer having a first width that corresponds to a second width of the opening, forming a second electrode layer in the recess that corresponds to the second electrode, and removing the first sacrificial layer to form the opening between the second electrode and the at least one first electrode.Type: ApplicationFiled: August 29, 2011Publication date: March 8, 2012Applicant: STMICROELECTRONICS, INC.Inventors: Venkatesh Mohanakrishnaswamy, Loi N. Nguyen
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Publication number: 20120058255Abstract: Electrically conductive polymer materials, such as mixtures of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(styrenesulfonate) (PSS) are combined with functionalized carbon nanotubes to form composites that exhibit increased electrical conductivity. Functionalized or non-functionalized carbon nanotubes combined with the same electrically conductive polymer materials are combined with non-conductive polymers to increase the electrical conductivity of the non-conductive polymer. The functionalized carbon nanotubes are functionalized with carboxyl and/or hydroxyl groups. The resulting materials are useful in methods of forming electrically conductive films and electrically conductive features.Type: ApplicationFiled: September 8, 2010Publication date: March 8, 2012Applicants: NANYANG TECHNOLOGICAL UNIVERSITY, STMICROELECTRONICS ASIA PACIFIC PTE LTD.Inventors: Thomas Kok Sim Gan, Mui Hoon Nai, Jonathan Sim, Charles Baudot, Solomon Ubong Udo, Nripan Mathews, Subodh Mhaisalkar, Cher Ming Tan
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Publication number: 20120057379Abstract: A power supply circuit for an electrical appliance, including a turning-on stage configured for determining a transition from a turned-off state, in which the power supply circuit is off and does not supply electric power, to a turned-on state of the power supply circuit. The turning-on stage includes a transducer of the remote-control type configured for triggering the transition in response to the reception of a wireless signal.Type: ApplicationFiled: March 17, 2010Publication date: March 8, 2012Applicant: STMicroelectronics S.r.l.Inventor: Natale Aiello
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Publication number: 20120056200Abstract: An embodiment of an integrated electronic device formed in a semiconductor body delimited by a lateral surface, which includes: a substrate made of a first semiconductor material; a first epitaxial region made of a second semiconductor material, which overlies the substrate and defines a first surface; a second epitaxial region made of a third semiconductor material, which overlies the first surface and is in contact with the first epitaxial region, the third semiconductor material having a bandgap narrower than the bandgap of the second semiconductor material; an active area, extending within the second epitaxial region and housing at least one elementary electronic component; and an edge structure, arranged between the active area and the lateral surface, and including a dielectric region arranged laterally with respect to the second epitaxial region, which overlies the first surface and is in contact with the first epitaxial region.Type: ApplicationFiled: August 30, 2011Publication date: March 8, 2012Applicant: STMICROELECTRONICS S.R.L.Inventors: Ferruccio FRISINA, Angelo MAGRI', Mario Giuseppe SAGGIO
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Publication number: 20120059622Abstract: A street light monitoring system has a small fraction of the street lights in the system being anchor nodes that are configured to detect and store their own actual fixed position, thereby acting as reference points. Further, the other street lights are referred to as blind nodes and do not have their actual fixed position but can derive their position using the coordinates of the anchor nodes and estimating their distance to them. The distance estimation for any blind node can be performed using a received signal strength indication (RSSI) measured at the respective blind node for small distances of up to a threshold value and a link quantization technique takes advantage of the typical placement of the street lights. Inferred distances between the street lights can be assigned to pre-determined categories of distances for a coarse estimation and further position adjustment to a closest possible “real” position.Type: ApplicationFiled: August 12, 2011Publication date: March 8, 2012Applicant: STMICROELECTRONICS S.R.L.Inventors: VINCENZO CACACE, MARCO RIZZELLO