Patents Assigned to STMicroelectronics
  • Patent number: 8258818
    Abstract: Techniques for operating a switched-capacitor circuit to reduce input and feedback dependence and/or reduce reference modulation. A switched-capacitor circuit can be operated in four phases. In a first phase at a start of a cycle, the capacitor is charged/discharged by a common mode signal to mask any residual charge stored in the capacitor from a previous cycle. In a second phase, the capacitor is charged with an input signal. During a third phase, the capacitor is charged with a wide-bandwidth auxiliary reference signal, and during a fourth phase the capacitor is charged with a reference signal. During the third and fourth phases, the capacitor may be coupled to an integrating circuit to integrate a difference between the input signal and the reference signal.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: September 4, 2012
    Assignee: STMicroelectronics International N.V.
    Inventors: Chandrajit Debnath, Vigyan Jain, Adeel Ahmad
  • Patent number: 8260994
    Abstract: An interface is described which has at least one chip side port with a first plurality of pins for conveying fields of a packet and first and second circuit side ports each port having a set of pins with a lower number than the first set of pins in the chip side port. The interface is constructed so that interrupt signals from an off-chip circuit can be conveyed on-chip in a manner such that the interrupt signals are indistinguishable from interrupt signals received from on-chip modules connected to an on-chip communication path. The same principle is applicable to power-down signals.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: September 4, 2012
    Assignee: STMicroelectronics N.V.
    Inventors: Stuart Ryan, Andrew Jones
  • Patent number: 8258798
    Abstract: A method and a circuit for measuring an on chip duty cycle. The circuit includes a capacitor, a switching circuit, a current source, a comparator circuit and a counter. The circuit receives a first clock signal and a second clock signal. The first clock signal has a 50% duty cycle and the second signal has an unknown duty cycle signal. The switching circuit first receives the first clock signal and then the second clock signal for measuring the duty cycle. The comparator circuit compares a comparator voltage with a reference voltage for the first clock signal to measure a first elapsed cycle using the counter. The comparator circuit again compares a comparator voltage with a reference voltage for the second clock signal to measure a second elapsed cycle using the counter. The counter measures the first elapsed cycle and the second elapsed cycle corresponding to the first clock signal and the second clock signal for a duration in which the comparator voltage equals the reference voltage.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: September 4, 2012
    Assignee: STMicroelectronics International N.V.
    Inventor: Nitin Agarwal
  • Patent number: 8258828
    Abstract: An integrated circuit includes a saw-tooth generator including a saw tooth node configured to have a saw-tooth voltage generated thereon; and a first switch having a first end connected to the saw tooth node. The integrated circuit further includes a second switch coupled between an output node and an electrical ground, wherein the first switch and the second switch are configured to operate synchronously. A first current source is connected to the saw tooth node. A second current source is connected to the output node.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: September 4, 2012
    Assignee: STMicroelectronics (Shenzhen) R&D Co. Ltd.
    Inventors: Jun Liu, Haibo Zhang
  • Patent number: 8259790
    Abstract: In an embodiment of a method for converting an input video sequence, comprising digital images organized in frames and operating at a variable frame-rate, into an output video sequence, operating at a pre-set constant frame-rate, it is envisaged to store the input video sequence temporarily and to control fetching of images of said temporarily stored input video sequence. The method moreover envisages: controlling fetching of images from the temporarily stored input video sequence by adjusting an emptying rate to form an intermediate video sequence; and carrying out an operation of motion-compensated interpolation on the intermediate video sequence to form the output video sequence operating at a pre-set constant frame-rate, the emptying rate being adjusted as a function of a number of images of the input video sequence with variable frame-rate temporarily stored.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: September 4, 2012
    Assignee: STMicroelectronics S.r.l.
    Inventors: Daniele Alfonso, Daniele Bagni, Fabrizio Rovati
  • Patent number: 8258822
    Abstract: An apparatus and a method switch a load through a power transistor. The apparatus includes: a first current generator for generating a current to charge a capacitance of a control terminal of the power transistor during power on of the power transistor; a second current generator for generating a current to discharge the capacitance during power off of the power transistor. The apparatus is equipped with control circuitry having a storage element for storing a voltage value representative of the potential difference between the control terminal and a conduction terminal of the power transistor when the power transistor operates in the saturation region and a discharge circuit for generating an additional current to discharge the capacitance during the power-off process. The additional current is a function of the potential difference of the control terminal and the stored voltage value from the conduction terminal.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: September 4, 2012
    Assignee: STMicroelectronics S.r.l.
    Inventors: Salvatore Tumminaro, Salvatore Giombanco
  • Patent number: 8259879
    Abstract: The method is for detecting the eventual presence of an interferer that is adapted to interfere with a wireless device. The wireless device is provided with at least one receiving chain including an analog to digital conversion stage. The method includes receiving on the receiving chain an incident signal, and delivering to the ADC stage an analog signal from the incident signal. The method further includes elaborating or determining a binary information from a binary signal delivered by the ADC stage and representative of the level of the analog signal, analyzing a temporal evolution of the binary information and detecting the presence of the interferer from the analysis.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: September 4, 2012
    Assignee: STMicroelectronics N.V.
    Inventors: Friedbert Berens, Eric Achkar
  • Patent number: 8259486
    Abstract: A write boost circuit provides an automatic mode control for boost with different modalities with respect to the external supply voltage and also with respect to the extent of boost required at different process corners. The write boost circuit also takes care of the minimum boost provided to process corners with good writability where less boost is required. The boost is realized in terms of ground raising in the particular context and in general applicable to all other methods.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: September 4, 2012
    Assignee: STMicroelectronics International N.V.
    Inventors: Ashish Kumar, Naveen Batra
  • Publication number: 20120217947
    Abstract: A voltage converter device includes a voltage regulator having a supply terminal for receiving a supply voltage and an output terminal for providing a regulated voltage. A voltage multiplier is for receiving the regulated voltage and providing a boosted voltage higher in absolute value than the regulated voltage. The voltage multiplier includes circuitry for providing a clock signal that switches periodically between the regulated voltage and a reference voltage, and a sequence of capacitive stages that alternately accumulate and transfer electric charge according to the clock signal for generating the boosted voltage from the regulated voltage. The voltage regulator includes a power transistor and a regulation transistor each having a first conduction terminal, a second conduction terminal and a control terminal.
    Type: Application
    Filed: February 21, 2012
    Publication date: August 30, 2012
    Applicant: STMicroelectronics, S.r.I.
    Inventors: MARIO MICCICHE, Antonio Conte, Carmelo Ucciardello, FrancescoNino Mammoliti
  • Publication number: 20120221827
    Abstract: An address decoding device may include a supply terminal for a supply voltage, a conductive path configured to provide an electric signal, associated with an address of at least one memory cell, and an address terminal connected to the conductive path and structured to receive the electric signal. An address decoder may be connected to the address terminal to receive the electric signal. The decoder may have a decoding operative voltage associated therewith. A switch circuit may be structured to electrically connect the address terminal to the supply terminal when the address terminal takes a threshold voltage imposed by the electric signal, and may bring the address terminal to the decoding operative voltage.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 30, 2012
    Applicant: STMicroelectronics S.r.I.
    Inventors: Maurizio Francesco Perroni, Giuseppe Castagna
  • Publication number: 20120220090
    Abstract: An embodiment of a method for manufacturing a power device being integrated on a semiconductor substrate comprising at least the steps of making, in the semiconductor substrate, at least a trench having sidewalls and a bottom, covering the sidewalls and the bottom of said at least one trench with a first insulating coating layer and making, inside said at least one trench, a conductive gate structure. An embodiment of the method provides the formation of the conductive gate structure comprising the steps of covering at least the sidewalls with a second conductive coating layer of a first conductive material; making a conductive central region of a second conductive material having a different resistivity than the first conductive material; and making a plurality of conductive bridges between said second conductive coating layer and said conductive central region.
    Type: Application
    Filed: March 1, 2012
    Publication date: August 30, 2012
    Applicant: STMICROELECTRONICS S.r.I.
    Inventors: Angelo MAGRI, Antonino Sebastiano ALESSANDRIA, Stefania FORTUNA, Leonardo FRAGAPANE
  • Publication number: 20120218261
    Abstract: A graphic system having a central processing unit; a system memory coupled to the central processing unit; a display unit provided with a corresponding screen; a graphic module coupled to and controlled by the central processing unit to render an image on the screen of the display unit, the graphic module including a fragment graphic module having a depth test buffer for storing a current depth value; a depth test stage coupled to the depth test buffer for comparing the current depth value with a depth coordinate associated with an incoming fragment and defining a resulting fragment; a test stage for testing the resulting fragment and defining a retained fragment; a buffer writing stage operatively associated with the test stage for receiving the retained fragment, the buffer writing stage coupled to the depth test buffer for updating the current depth value with a depth value of the retained fragment.
    Type: Application
    Filed: April 30, 2012
    Publication date: August 30, 2012
    Applicant: STMICROELECTRONICS S.R.L.
    Inventor: Mirko Falchetto
  • Publication number: 20120217649
    Abstract: An array of functional cells includes a subset of cells powered by at least one supply rail. That supply rail is formed of first segments located on a first metallization level and second segments located on a second metallization level with at least one conductor element extending between the first and second segments to electrically connect successive segments of the supply rail.
    Type: Application
    Filed: February 10, 2012
    Publication date: August 30, 2012
    Applicant: STMICROELECTRONICS S.A.
    Inventor: Remy Chevallier
  • Publication number: 20120217655
    Abstract: An electronic device includes a first semi-conductor die, a second semi-conductor die and an electrically conductive element. The electrically conductive element includes a first electrically conductive part interposed at least partially between the first semi-conductor die and the second semi-conductor die, wherein said first part is electrically coupled to the first semi-conductor die. The electrically conductive element further includes a second electrically conductive part electrically coupled to the first part, wherein said second part extends from at least part of the first part. The first part is an electrically conductive strap between the dice, and the second part is clip extending from at least part of the strap.
    Type: Application
    Filed: February 9, 2012
    Publication date: August 30, 2012
    Applicant: STMicroelectronics S.r.l.
    Inventors: Davide Giuseppe Patti, Agatino Minotti
  • Publication number: 20120218002
    Abstract: An apparatus for measuring time interval between two edges of a clock signal and includes an edge generator, a first multi-tap delay module, a second multi-tap delay module, and a multi-element phase detector. The edge generator produces a first edge at a first output node and a second selected edge at a second output node. First multi-tap delay module provides a first incremental delay at each tap to the first edge. Second multi-tap delay module provides a second incremental delay at each tap to the second selected edge. Each element of the multi-element phase detector has first and second input terminals. The first input terminal is coupled to a selected tap of the first multi-tap delay module and the second input terminal is coupled to a corresponding tap of the second multi-tap delay module. The output terminals of the multi-element phase detector provide the value of the time interval.
    Type: Application
    Filed: April 13, 2012
    Publication date: August 30, 2012
    Applicant: STMicroelectronics Pvt. Ltd.
    Inventors: Kallol Chatterjee, Anurag Tiwari
  • Publication number: 20120218837
    Abstract: A voltage regulator may include an input terminal for receiving an input voltage and an output terminal for providing a respective output voltage, a regulation transistor having a first conduction terminal coupled to the input terminal for receiving the input voltage, a second conduction terminal coupled to the output terminal, and a control terminal coupled to the output of a first operational amplifier. The first operational amplifier may have a non-inverting input terminal for receiving a first reference voltage, and an inverting input terminal coupled to a first terminal of a divider circuit for receiving a second reference voltage.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 30, 2012
    Applicant: STMicroelectronics S.r.l.
    Inventors: Alberto Jose' DIMARTINO, Antonino CONTE, Maria GIAQUINTA, Giovanni MATRANGA
  • Patent number: 8252638
    Abstract: A method for forming an empty area under a layer of a given material, including forming on a substrate a stacking of a photosensitive layer and of a layer of the given material; insolating a portion of the photosensitive layer or its complement according to whether the photosensitive layer is positive or negative with an electron beam crossing the layer of the given material; and removing the portion of the photosensitive layer.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: August 28, 2012
    Assignee: STMicroelectronics S.A.
    Inventors: Philippe Coronel, Yves Laplanche, Laurent Pain
  • Patent number: 8254194
    Abstract: A reading circuit for a semiconductor memory, comprising: a circuital branch adapted to be electrically coupled to a bit line which is connected to a memory cell to be read; an evaluation circuit adapted to sense a cell electric current flowing through the bit line during a sensing phase of a reading operation of the data stored into the memory cell, the evaluation circuit comprising a negative feedback control loop adapted to control the potential of the bit line during the sensing phase, the control loop comprising a differential amplifier having an inverting input terminal operatively connected to the bit line, a non-inverting input terminal fed by a first reference potential, and a feedback circuital path connected between an output of the differential amplifier and the inverting input, wherein the feedback circuital path is adapted to conduct a measure current corresponding to the cell electric current, and comprises current/voltage conversion means for converting the measure current into a corresponding
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: August 28, 2012
    Assignee: STMicroelectronics S.r.l.
    Inventors: Antonio Giambartino, Michele La Placa, Ignazio Martines
  • Patent number: 8253092
    Abstract: An optical die, which is intended to be placed in front of an optical sensor of a semiconductor component, has an optically useful zone having an optical axis and exhibiting a variable refractive index. Specifically the refractive index of the die is variable in an annular peripheral zone lying between a radius Ru enveloping the useful zone and a smaller radius Ro. The index varies as a function of radial distance from a lower value near the smaller radius Ro to a higher value near the radius Ru. The function of the variable refractive index lies between a maximum and minimum profile.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: August 28, 2012
    Assignee: STMicroelectronics (Grenoble) SAS
    Inventors: Emmanuelle Vigier-Blanc, Guillaume Cassar, Thierry Lepine
  • Patent number: 8255597
    Abstract: An interface device, such as for a System-on-Chip (SoC) bus, transfers data from an input queue through an output to a target. The interface device includes a buffer network for buffering input data when the target is not available for receiving the data. A multiplexer switches between a first operating condition for directing to the target the data from the input queue, and a second operating condition for directing to the target the buffered data from the buffer network. A finite-state machine selectively switches the multiplexer between the first operating condition and the second operating condition based on an acknowledgement signal received from the target. This indicates the availability of the target for receiving the data.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: August 28, 2012
    Assignee: STMicroelectronics S.R.L.
    Inventors: Francesco Giotta, Salvatore Pisasale, Giuseppe Falconeri