Patents by Inventor Patrice Ouvrier-Buffet
Patrice Ouvrier-Buffet has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10627531Abstract: A circuit for counting photons, including: an input terminal intended to be connected to a detector of ionising radiation; an analogue stage for generating a pulsed signal, each pulse of which has an amplitude proportional to the energy released by an interaction of at least one photon in the detector; and a digital stage including: at least one first comparator for comparing the amplitude of the pulses to a first threshold; a differentiator circuit for determining periods in which the derivative of the pulse signal is of a given sign; at least one first logic gate for combining the outputs of the first comparator and the differentiator circuit; and at least one first counter for counting the number of pulses present on the output of the combining element.Type: GrantFiled: April 10, 2017Date of Patent: April 21, 2020Assignee: Commissariat à l'Énergie Atomique et aux Énergies AlternativesInventor: Patrice Ouvrier-Buffet
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Publication number: 20190120975Abstract: A circuit for counting photons, including: an input terminal intended to be connected to a detector of ionising radiation; an analogue stage for generating a pulsed signal, each pulse of which has an amplitude proportional to the energy released by an interaction of at least one photon in the detector; and a digital stage including: at least one first comparator for comparing the amplitude of the pulses to a first threshold; a differentiator circuit for determining periods in which the derivative of the pulse signal is of a given sign; at least one first logic gate for combining the outputs of the first comparator and the differentiator circuit; and at least one first counter for counting the number of pulses present on the output of the combining element.Type: ApplicationFiled: April 10, 2017Publication date: April 25, 2019Applicant: Commissariat à I'Énergie Atomique et aux Énergies AlternativesInventor: Patrice Ouvrier-Buffet
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Patent number: 9885674Abstract: A method for characterizing nature of a material, including: providing at least one sample of the material between an X-ray source and a detector; using the X-ray source to make N X-radiation spectra transmitted through the material, each for a time; calculating transmission function of the material as a function of energy or the detection channel; and in each of at least two energy zones, calculating the integral of the transmission function, thus forming at least a first transmission coefficient and a second transmission coefficient.Type: GrantFiled: November 2, 2010Date of Patent: February 6, 2018Assignee: Commissariat a l'energie atomique et aux energies alternativesInventors: Patrice Ouvrier-Buffet, Guillaume Beldjoudi, Veronique Rebuffel, Jean Rinkel
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Patent number: 9696432Abstract: The invention relates to a device for processing information delivered by a photon detector, comprising: an analogue circuit for generating a signal comprising a series of pulses, each pulse having an amplitude proportional to the energy freed by an interaction of a photon in the detector; an analogue circuit for determining the instant at which the amplitude of a pulse of the signal is maximal; and an element for capturing the value of the signal at said instant.Type: GrantFiled: February 27, 2014Date of Patent: July 4, 2017Assignee: Commissariat à l'Énergie Atomique et aux Énergies AlternativesInventor: Patrice Ouvrier Buffet
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Patent number: 9297911Abstract: An electronic device to simply and efficiently measure energy of incident photons in a very short time and with a very high count rate and high precision, starting from current pulses from an ionizing electromagnetic radiation detector, the electronic device including an analog delay line with switched capacitors with controlled loss at an output from a charge preamplifier.Type: GrantFiled: October 4, 2012Date of Patent: March 29, 2016Assignee: Commissariat a l'energie atomique et aux energies alternativesInventors: Jean-Pierre Rostaing, Patrice Ouvrier-Buffet
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Publication number: 20160003951Abstract: The invention relates to a device for processing information delivered by a photon detector, comprising: an analogue circuit for generating a signal comprising a series of pulses, each pulse having an amplitude proportional to the energy freed by an interaction of a photon in the detector; an analogue circuit for determining the instant at which the amplitude of a pulse of the signal is maximal; and an element for capturing the value of the signal at said instant.Type: ApplicationFiled: February 27, 2014Publication date: January 7, 2016Applicant: Commissariat à I'Énergie Atomique et aux Énergies AlternativesInventor: Patrice Ouvrier Buffet
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Patent number: 9065432Abstract: A device that processes a signal delivered by a radiation detector includes a circuit that delivers a voltage pulse whose amplitude is proportional to a charge detected by the radiation detector. The device also includes an analog to digital converter to digitize the voltage pulse at a given sampling frequency and delivers a corresponding digital signal to a processing circuit. The processing circuit reads the digital signal, computes a temporal variation rate of the digital signal and captures the digital signal when the temporal variation reaches a threshold.Type: GrantFiled: October 27, 2010Date of Patent: June 23, 2015Assignee: Commissariat à l'énergie atomique et aux énergies alternativesInventors: Patrice Ouvrier-Buffet, Andrea Brambilla
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Publication number: 20140264050Abstract: An electronic device to simply and efficiently measure energy of incident photons in a very short time and with a very high count rate and high precision, starting from current pulses from an ionizing electromagnetic radiation detector, the electronic device including an analog delay line with switched capacitors with controlled loss at an output from a charge preamplifier.Type: ApplicationFiled: October 4, 2012Publication date: September 18, 2014Applicant: Commissariat a l'energie atomique et aux ene altInventors: Jean-Pierre Rostaing, Patrice Ouvrier-Buffet
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Patent number: 8748832Abstract: An ionizing radiation detection device including a detector of semi-conductor material intended to be biased thanks to electrodes, among which reading electrodes connected to a reading circuit process signals they provide to reject those causing a poor spectrometric response, that is those affected by an induction share and possibly those affected by a charge or electronic noise share.Type: GrantFiled: June 28, 2012Date of Patent: June 10, 2014Assignee: Commissariat a l'energie atomique et aux energies alternativesInventors: Andréa Brambilla, Patrice Ouvrier-Buffet
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Patent number: 8642359Abstract: An integrated circuit intended to be assembled with an electromagnetic radiation detector, the integrated circuit comprising a device for processing signals stemming from the detector, the processing device being covered with at least one conductive plate for protection against electromagnetic radiation, intended to be placed between said detector and said integrated circuit, said conductive plate including one or more apertures letting through conductive elements providing an electrical connection between the processing device and the detector.Type: GrantFiled: October 10, 2007Date of Patent: February 4, 2014Assignee: Commissariat a l'Energie AtomiqueInventors: Jean-Pierre Rostaing, Olivier Billoint, Patrice Ouvrier-Buffet, Patrick Villard
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Publication number: 20130168562Abstract: This invention relates to an ionizing radiation detection device including a detector (1) of semi-conductor material intended to be biased thanks to electrodes (3.1, 3.2), among which reading electrodes (3.2) connected to a reading circuit (2) process signals they provide to reject those causing a poor spectrometric response, that is those affected by an induction share and possibly those affected by a charge or electronic noise share.Type: ApplicationFiled: June 28, 2012Publication date: July 4, 2013Applicant: Commissariat a l'energie atomique et aux ene altInventors: Andrea Brambilla, Patrice Ouvrier-Buffet
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Publication number: 20120239310Abstract: A method for characterising nature of a material, including: providing at least one sample of the material between an X-ray source and a detector; using the X-ray source to make N X-radiation spectra transmitted through the material, each for a time; calculating transmission function of the material as a function of energy or the detection channel; and in each of at least two energy zones, calculating the integral of the transmission function, thus forming at least a first transmission coefficient and a second transmission coefficient.Type: ApplicationFiled: November 2, 2010Publication date: September 20, 2012Applicant: commissariat a l'energie atomique et aux energies alternativesInventors: Patrice Ouvrier-Buffet, Guillaume Beldjoudi, Veronique Rebuffel, Jean Rinkel
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Publication number: 20110098980Abstract: The invention concerns a device for processing a signal delivered by a radiation detector (1), the device comprising a circuit (2, 3) able to deliver a voltage pulse whereof the amplitude is proportional to a charge detected by the detector (1) and an analog/digital converter (ADC) that digitizes the voltage pulse at a given sampling frequency and delivers a digital signal, characterized in that it comprises, downstream of the analog/digital converter (ADC), a processing circuit (5) that comprises: a reading unit for reading the digital signal (S (t)) delivered by the analog/digital converter (ADC), a computing unit that computes a temporal variation rate of the read digital signals, and a circuit able to capture the read digital signals whereof the temporal variation reaches a predetermined threshold.Type: ApplicationFiled: October 27, 2010Publication date: April 28, 2011Applicant: COMMISSARIAT A L' ENERGIE ATOMIQUEInventors: Patrice OUVRIER-BUFFET, Andrea Brambilla
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Patent number: 7652242Abstract: This device for processing and digitizing an energy spectrum of a radiation, comprises a charge preamplification circuit of the integrating circuit type, suitable for being connected to a semiconductor detector; a lag line energy measurement circuit connected to the output of the preamplification circuit; and a sampler connected to the output of the energy measurement circuit. It further comprises a synchronization circuit a current pulse measurement circuit connected to the output of the preamplification circuit and calculating the difference between the output and a differential of the output of the preamplification circuit; and a discrimination circuit forming a binary signal according to the output of the pulse measurement circuit said logic signal controlling the sampling times of the sampler.Type: GrantFiled: October 29, 2008Date of Patent: January 26, 2010Assignee: Commissariat A l'Energie AtomiqueInventors: Patrice Ouvrier-Buffet, Ken-Ji De La Rosa
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Publication number: 20100010779Abstract: An integrated circuit intended to be assembled with an electromagnetic radiation detector, the integrated circuit comprising a device for processing signals stemming from the detector, the processing device being covered with at least one conductive plate for protection against electromagnetic radiation, intended to be placed between said detector and said integrated circuit, said conductive plate including one or more apertures letting through conductive elements providing an electrical connection between the processing device and the detector.Type: ApplicationFiled: October 10, 2007Publication date: January 14, 2010Inventors: Jean-Pierre Rostaing, Olivier Billoint, Patrice Ouvrier-Buffet, Patrick Villard
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Patent number: 7564040Abstract: A device for processing a signal (i) derived from a particular detector, the device including an integrator for measuring the total charge transported by an input signal (i2) feeding the integrator for a predetermined time interval. The device further includes a plurality of units for receiving detector signal (i) derived from the particle detector, reducing the background noise present in the detector signal (i), and producing the input signal (i2). The invention is applicable to various devices and appliances for measuring flow of particles such as photons.Type: GrantFiled: November 25, 2003Date of Patent: July 21, 2009Assignee: Commissariat a l'Energie AtomiqueInventors: Patrice Ouvrier-Buffet, Francis Glasser, Marc Accensi
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Publication number: 20090152448Abstract: This device for processing and digitizing an energy spectrum of a radiation, comprises a charge preamplification circuit of the integrating circuit type, suitable for being connected to a semiconductor detector; a lag line energy measurement circuit connected to the output of the preamplification circuit; and a sampler connected to the output of the energy measurement circuit. It further comprises a synchronization circuit a current pulse measurement circuit connected to the output of the preamplification circuit and calculating the difference between the output and a differential of the output of the preamplification circuit; and a discrimination circuit forming a binary signal according to the output of the pulse measurement circuit said logic signal controlling the sampling times of the sampler.Type: ApplicationFiled: October 29, 2008Publication date: June 18, 2009Applicant: Commissariat A L'Energie AtomiqueInventors: Patrice Ouvrier-Buffet, Ken-Ji De La Rosa
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Patent number: 7436165Abstract: An apparatus adapted to measure of current pulses that are very brief (a few nanoseconds) and of very low amplitude (a few microamps), such as those that can emanate from a photodetector used for the optical transmission of data at very high speed, or from a photodetector (photodiode or photoconductor) subject to a radiation that is of pulsed nature (in particular: X, gamma and other radiations). The circuit includes an integration stage (IT), a differentiation stage (DR), and a subtraction stage (SS). The time constants Rp.Cint and R2.C2 of the integration and differentiation stages are preferably equal.Type: GrantFiled: September 8, 2006Date of Patent: October 14, 2008Assignee: Commissariat A l'Energie AtomiqueInventors: Patrice Ouvrier-Buffet, Jean-Pierre Rostaing
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Patent number: 7388210Abstract: This is a processing circuit for a spectrometry chain including a particle radiation detector (21), including a charge preamplifier stage (20) receiving a current (I1) from the detector, representative of the amount of charges emitted by a particle which has interacted with the detector, and an integrator stage (26). A differentiator stage (25) is connected between the charge preamplifier stage (20) and the integrator stage (26), the differentiator stage (25) receiving a signal (V1) from the charge preamplifier stage (20) and delivering to the integrator stage (26), a signal (V2), image of the detector current (I1), the integrator stage (26) delivering, an image (V3) of the amount of charges emitted by a particle which has interacted with the detector. Application notably to the high energy single channel probes.Type: GrantFiled: November 20, 2003Date of Patent: June 17, 2008Assignee: Commissariat a l'Energie AtomiqueInventors: Patrice Ouvrier-Buffet, Jacques Rustique, Loïck Verger
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Patent number: 7345285Abstract: A method for exploiting a signal provided by a detector is disclosed. For one embodiment, the time spent by at least one part of the signal above a value S0 of a first threshold is determined. The charge corresponding to the part of the signal during the time spent above the value S0 of the first threshold is determined. A new value S?0 of the first threshold as a function of the charge and the time spent above the value S0 of the first threshold is determined. The steps of determining the time spent by at least one part of the signal above a value S0 of a first threshold and determining the charge corresponding to the part of the signal during the time spent above the value S0 of the first threshold are reiterated at least once using the new value of the first threshold.Type: GrantFiled: March 29, 2005Date of Patent: March 18, 2008Assignee: Commissariat a l'Energie AtomiqueInventors: Guillaume Montemont, Patrice Ouvrier-Buffet, Loick Verger