Patents by Inventor Renato Negra

Renato Negra 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).

  • Patent number: 9787255
    Abstract: The invention relates to a sequential broadband Doherty power amplifier with adjustable output power back-off The sequential broadband Doherty power amplifier has at least one input (I1, I2; RFin) for receiving at least one broadband HF signal, wherein the broadband HF signal or broadband HF signals (RFin) have at least an average power level (carrier/average) and a peak envelope power level (peak), with the average power level and the peak envelope power level defining a crest factor, and a first amplifier branch for amplifying the input signal, with the first amplifier branch providing the amplification substantially for the low and at least the average power level, at least one second amplifier branch for amplifying the input signal, wherein the second amplifier branch substantially provides the amplification for the peak envelope power level, wherein the output of the first amplifier branch is connected via an impedance inverter (ZT) to the output of the second amplifier branch, the junction (CN) being co
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: October 10, 2017
    Assignee: RWTH AACHEN
    Inventors: Renato Negra, Xuan Anh Nghiem
  • Publication number: 20160268976
    Abstract: The invention relates to a sequential broadband Doherty power amplifier with adjustable output power back-off The sequential broadband Doherty power amplifier has at least one input (I1, I2; RFin) for receiving at least one broadband HF signal, wherein the broadband HF signal or broadband HF signals (RFin) have at least an average power level (carrier/average) and a peak envelope power level (peak), with the average power level and the peak envelope power level defining a crest factor, and a first amplifier branch for amplifying the input signal, with the first amplifier branch providing the amplification substantially for the low and at least the average power level, at least one second amplifier branch for amplifying the input signal, wherein the second amplifier branch substantially provides the amplification for the peak envelope power level, wherein the output of the first amplifier branch is connected via an impedance inverter (ZT) to the output of the second amplifier branch, the junction (CN) being co
    Type: Application
    Filed: October 1, 2014
    Publication date: September 15, 2016
    Inventors: Renato NEGRA, Xuan Anh NGHIEM
  • Patent number: 9240759
    Abstract: The invention relates to an amplifier assembly.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: January 19, 2016
    Assignee: RWTH AACHEN
    Inventors: Renato Negra, Ahmed Aref
  • Publication number: 20150194938
    Abstract: The invention relates to an amplifier assembly.
    Type: Application
    Filed: June 12, 2013
    Publication date: July 9, 2015
    Inventors: Renato Negra, Ahmed Aref
  • Patent number: 9077391
    Abstract: The invention relates to a transmitter front-end device for generating output signals representing a digital stream, wherein the device has at least one first input for a first input signal and at least one second input for a second input signal, with the first input signal and the second input signal representing a complex data signal of the digital stream and being intended to influence an output signal of the transmitter front-end device.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: July 7, 2015
    Assignee: RWTH AACHEN
    Inventors: Renato Negra, Bjorn Thorsten Thiel
  • Publication number: 20140355718
    Abstract: The invention relates to a device for modifying trajectories.
    Type: Application
    Filed: September 12, 2012
    Publication date: December 4, 2014
    Applicant: RWTH AACHEN
    Inventors: Junqing Guan, Renato Negra
  • Publication number: 20140328434
    Abstract: The invention relates to a transmitter front-end device for generating output signals representing a digital stream, wherein the device has at least one first input for a first input signal and at least one second input for a second input signal, with the first input signal and the second input signal representing a complex data signal of the digital stream and being intended to influence an output signal of the transmitter front-end device.
    Type: Application
    Filed: December 4, 2012
    Publication date: November 6, 2014
    Applicant: RWTH Aachen
    Inventors: Renato Negra, Bjorn Thorsten Thiel
  • Publication number: 20140266463
    Abstract: The invention relates to an amplifier arrangement for high-frequency signals. Said amplifier arrangement comprises a signal input (IN) for receiving high-frequency signals (RFin) that are to be amplified, a first amplifier device (Mn1, Mn2) that amplifies the high-frequency signals that are to be amplified, the first amplifier device having a drain circuit, a source follower circuit or a similar device, an additional amplifier device (GB; Mn3, Mn4, Mn5, M6) which is arranged in parallel to the first amplifier device (Mn1, Mn22) and amplifies the high-frequency signals that are to be amplified, and a signal output (OUT) for outputting the high-frequency signals (RFout) amplified by the first and the additional amplifier device (GB; Mn3, Mn4, Mn5, Mn6).
    Type: Application
    Filed: April 20, 2012
    Publication date: September 18, 2014
    Applicant: RWTH AACHEN
    Inventors: Ahmed Aref, Renato Negra
  • Patent number: 8724733
    Abstract: The present disclosure is concerned with a digital transmitter using Delta-Sigma modulators (DMSs) that uses an up-sampler and modulator block that follows the DSMs to generate the RF equivalent of the baseband signal to be transmitted. The up-sampler and modulator block is simple to implement and contains only one or a few multiplexers implemented in high speed logic technology.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: May 13, 2014
    Inventors: Fadhel M. Ghannouchi, Mohamed Helaoui, Safar Hatami, Renato Negra
  • Publication number: 20100183093
    Abstract: The present disclosure is concerned with a digital transmitter using Delta-Sigma modulators (DMSs) that uses an up-sampler and modulator block that follows the DSMs to generate the RF equivalent of the baseband signal to be transmitted. The up-sampler and modulator block is simple to implement and contains only one or a few multiplexers implemented in high speed logic technology.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 22, 2010
    Inventors: Fadhel M. Ghannouchi, Mohamed Helaoui, Safar Hatami, Renato Negra