Patents by Inventor José A. Macedo
José A. Macedo 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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Publication number: 20220153786Abstract: The present invention relates to the use of a peptide to prevent biofilm formation by microorganisms on a surface, wherein said peptide is (i) a peptide consisting of 6 to 37 consecutive amino acids from a peptide of sequence SEQ ID NO: 1, (ii) a peptide of sequence SEQ ID NO: 4, or (iii) a peptidomimetic of (i) or (ii).Type: ApplicationFiled: February 20, 2020Publication date: May 19, 2022Applicants: UNIVERSITE DE RENNES 1, Centre national de la recherche scientifique, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL UFRGSInventors: Rafael GOMES VON BOROWSKI, Aline RIGON ZIMMER, Simone Cristina BAGGIO GNOATTO, Alexandre José MACEDO, Muriel PRIMON DE BARROS, Karine RIGON ZIMMER, Reynald GILLET, Grace GOSMANN
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Publication number: 20180243717Abstract: The present disclosure relates to the production of functional coatings for the controlled release of volatile agents. More specifically, the present disclosure relates to capsules, in particular microcapsules or nanocapsules, chemically functionalised with photocatalytic nanomaterials upon the internal or external surface of the wall of the capsule. The capsule, by solar action or artificial light, can have the same spectrum of electromagnetic radiation, and can release an active agent. The capsule can also transport the active agent, which has photocatalytic properties. The capsule has an external diameter of 0.1-500 ?m and can be formed by a wall and a nucleus to lodge the active agent. The present disclosure further relates to a method of obtainment of the capsules.Type: ApplicationFiled: July 5, 2016Publication date: August 30, 2018Applicant: UNIVERSIDADE DO MINHOInventors: Carlos José MACEDO TAVARES, Juliana Filipa GOUVEIA MARQUES
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Publication number: 20150240038Abstract: A method of transferring graphene to a polymeric substrate is disclosed herein. In a described embodiment, the method 400 comprises heating the polymeric substrate at 408 to at least partially melt the polymeric substrate; compressing the at least partially melted polymeric substrate against the graphene at 410 to form an intermediate graphene composite; and cooling the intermediate graphene composite at 412 to transfer the graphene to the polymeric substrate. Apparatuses for performing the transfer are also disclosed.Type: ApplicationFiled: February 26, 2015Publication date: August 27, 2015Inventors: Guilhermino Jose MACEDO FECHINE, Barbaros OZYILMAZ, Antonio Helio CASTRO NETO, Inigo MARTIN FERNANDEZ
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Publication number: 20120189681Abstract: A layered heterostructured coating has functional characteristics that enable the controlled release of volatile agents. The coating has photocatalytic properties, since it uses titanium dioxide, its derivatives or materials with similar photocatalytic properties (2), which upon solar irradiation open and/or degrade nano or microcapsules (3) and subsequently releases in a controlled form the volatile agents contained in them.Type: ApplicationFiled: December 11, 2009Publication date: July 26, 2012Inventors: Carlos José Macedo Tavares, Femando Da Silva Pina
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Patent number: 7929938Abstract: Second-order intermodulation distortion can be suppressed in a direct conversion radio receiver having a downconversion mixer by calibrating resistors and a current source in the mixer. A test signal is applied to the signal inputs of the mixer transconductor. The resistances of first and second variable resistor circuits connected to the switching quad are then varied while also varying a variable current source. Each time the resistances and current are set to new values, the resulting mixer output signal is measured. When the measured output signal is determined to be at a minimum, the variable resistors and current source are left at the corresponding values to which they have been set. Adjusted in this manner, the current source counteracts the DC offset voltage at the mixer output.Type: GrantFiled: March 19, 2008Date of Patent: April 19, 2011Assignee: Skyworks Solutions, Inc.Inventors: Shawn Sellars, Jose Macedo
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Publication number: 20090239495Abstract: Second-order intermodulation distortion can be suppressed in a direct conversion radio receiver having a downconversion mixer by calibrating resistors and a current source in the mixer. A test signal is applied to the signal inputs of the mixer transconductor. The resistances of first and second variable resistor circuits connected to the switching quad are then varied while also varying a variable current source. Each time the resistances and current are set to new values, the resulting mixer output signal is measured. When the measured output signal is determined to be at a minimum, the variable resistors and current source are left at the corresponding values to which they have been set. Adjusted in this manner, the current source counteracts the DC offset voltage at the mixer output.Type: ApplicationFiled: March 19, 2008Publication date: September 24, 2009Applicant: SKYWORKS SOLUTIONS, INC.Inventors: Shawn Sellars, Jose Macedo
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Patent number: 6977552Abstract: An impedance matching low noise amplifier (“LNA”) having a bypass switch includes an amplification circuit, a bypass switching network and a match adjustment circuit. The amplification circuit has an amplifier input and an amplifier output, and is configured to receive a radio frequency (RF) input signal at the amplifier input and apply a gain to generate an amplified RF output signal at the amplifier output. The bypass switching network is coupled to a low-gain control signal and is also coupled between the amplifier input and the amplifier output. The bypass switching network is configured to couple the amplifier input to the amplifier output when the low-gain control signal is enabled in order to feed the RF input signal through to the RF output signal. The match adjustment circuit is coupled to the low-gain control signal and the RF input signal, and is configured to couple the RF input signal to an impedance when the low-gain control signal is enabled.Type: GrantFiled: July 21, 2004Date of Patent: December 20, 2005Assignee: Research In Motion LimitedInventor: José A. Macedo
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Patent number: 6959178Abstract: Tunable upconversion mixers that have a controllable passband response and provide substantial image rejection, making costly post-mixing filtering at least optional, if not unnecessary for many applications. A single mixer is able to support several frequency bands (and/or be accurately tuned within one frequency band) by means of varying the capacitance in a tunable load circuit for the mixer circuit. The tunable mixer comprises a mixer circuit having inputs for receiving a signal to be upconverted and an oscillator signal to be mixed with the signal to be upconverted. The mixer generates a mixer output signal at a desired sideband frequency and an image signal at an image frequency.Type: GrantFiled: January 20, 2003Date of Patent: October 25, 2005Assignee: IPR Licensing Inc.Inventors: José A. Macedo, Neric H. W. Fong, David G. Rahn
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Publication number: 20040251960Abstract: An impedance matching low noise amplifier (“LNA”) having a bypass switch includes an amplification circuit, a bypass switching network and a match adjustment circuit. The amplification circuit has an amplifier input and an amplifier output, and is configured to receive a radio frequency (RF) input signal at the amplifier input and apply a gain to generate an amplified RF output signal at the amplifier output. The bypass switching network is coupled to a low-gain control signal and is also coupled between the amplifier input and the amplifier output. The bypass switching network is configured to couple the amplifier input to the amplifier output when the low-gain control signal is enabled in order to feed the RF input signal through to the RF output signal. The match adjustment circuit is coupled to the low-gain control signal and the RF input signal, and is configured to couple the RF input signal to an impedance when the low-gain control signal is enabled.Type: ApplicationFiled: July 21, 2004Publication date: December 16, 2004Inventor: Jose A. Macedo
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Patent number: 6768377Abstract: An impedance matching low noise amplifier (“LNA”) having a bypass switch includes an amplification circuit, a bypass switching network and a match adjustment circuit. The amplification circuit has an amplifier input and an amplifier output, and is configured to receive a radio frequency (RF) input signal at the amplifier input and apply a gain to generate an amplified RF output signal at the amplifier output. The bypass switching network is coupled to a low-gain control signal and is also coupled between the amplifier input and the amplifier output. The bypass switching network is configured to couple the amplifier input to the amplifier output when the low-gain control signal is enabled in order to feed the RF input signal through to the RF output signal. The match adjustment circuit is coupled to the low-gain control signal and the RF input signal, and is configured to couple the RF input signal to an impedance when the low-gain control signal is enabled.Type: GrantFiled: June 24, 2003Date of Patent: July 27, 2004Assignee: Research In Motion LimitedInventor: José A. Macedo
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Publication number: 20030231055Abstract: An impedance matching low noise amplifier (“LNA”) having a bypass switch includes an amplification circuit, a bypass switching network and a match adjustment circuit. The amplification circuit has an amplifier input and an amplifier output, and is configured to receive a radio frequency (RF) input signal at the amplifier input and apply a gain to generate an amplified RF output signal at the amplifier output. The bypass switching network is coupled to a low-gain control signal and is also coupled between the amplifier input and the amplifier output. The bypass switching network is configured to couple the amplifier input to the amplifier output when the low-gain control signal is enabled in order to feed the RF input signal through to the RF output signal. The match adjustment circuit is coupled to the low-gain control signal and the RF input signal, and is configured to couple the RF input signal to an impedance when the low-gain control signal is enabled.Type: ApplicationFiled: June 24, 2003Publication date: December 18, 2003Inventor: Jose A. Macedo
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Publication number: 20030199259Abstract: Tunable upconversion mixers that have a controllable passband response and provide substantial image rejection, making costly post-mixing filtering at least optional, if not unnecessary for many applications. A single mixer is able to support several frequency bands (and/or be accurately tuned within one frequency band) by means of varying the capacitance in a tunable load circuit for the mixer circuit. The tunable mixer comprises a mixer circuit having inputs for receiving a signal to be upconverted and an oscillator signal to be mixed with the signal to be upconverted. The mixer generates a mixer output signal at a desired sideband frequency and an image signal at an image frequency.Type: ApplicationFiled: January 20, 2003Publication date: October 23, 2003Applicant: COGNIO, INC.Inventors: Jose A. Macedo, Neric H. W. Fong, David G. Rahn
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Patent number: 6586993Abstract: An impedance matching low noise amplifier (“LNA”) having a bypass switch includes an amplification circuit, a bypass switching network and a match adjustment circuit. The amplification circuit has an amplifier input and an amplifier output, and is configured to receive a radio frequency (RF) input signal at the amplifier input and apply a gain to generate an amplified RF output signal at the amplifier output. The bypass switching network is coupled to a low-gain control signal and is also coupled between the amplifier input and the amplifier output. The bypass switching network is configured to couple the amplifier input to the amplifier output when the low-gain control signal is enabled in order to feed the RF input signal through to the RF output signal. The match adjustment circuit is coupled to the low-gain control signal and the RF input signal, and is configured to couple the RF input signal to an impedance when the low-gain control signal is enabled.Type: GrantFiled: November 7, 2001Date of Patent: July 1, 2003Assignee: Research In Motion LimitedInventor: José A. Macedo
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Publication number: 20020053947Abstract: An impedance matching low noise amplifier (“LNA”) having a bypass switch includes an amplification circuit, a bypass switching network and a match adjustment circuit. The amplification circuit has an amplifier input and an amplifier output, and is configured to receive a radio frequency (RF) input signal at the amplifier input and apply a gain to generate an amplified RF output signal at the amplifier output. The bypass switching network is coupled to a low-gain control signal and is also coupled between the amplifier input and the amplifier output. The bypass switching network is configured to couple the amplifier input to the amplifier output when the low-gain control signal is enabled in order to feed the RF input signal through to the RF output signal. The match adjustment circuit is coupled to the low-gain control signal and the RF input signal, and is configured to couple the RF input signal to an impedance when the low-gain control signal is enabled.Type: ApplicationFiled: November 7, 2001Publication date: May 9, 2002Inventor: Jose A. Macedo