Patents by Inventor Rui-Paulo da Silva Martins

Rui-Paulo da Silva Martins 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).

  • ANALOG TO DIGITAL CONVERTER CIRCUIT
    Publication number: 20120229313
    Abstract: The present invention provides an analog-to-digital converter (ADC) circuit comprising two time-interleaved successive approximation register (SAR) ADCs. Each of the two time-interleaved SAR ADCs comprises a first stage SAR sub-ADC, a residue amplifier, a second stage SAR sub-ADC and a digital error correction logic.
    Type: Application
    Filed: September 14, 2011
    Publication date: September 13, 2012
    Applicant: University of Macau
    Inventors: Sai-Weng SIN, He-Gong WEI, Franco MALOBERTI, Li DING, Yan ZHU, Chi-Hang CHAN, U-Fat CHIO, Seng-Pan U, Rui Paulo da Silva MARTINS
  • ANALOG-TO-DIGITAL CONVERTING SYSTEM
    Publication number: 20120194364
    Abstract: A novel analog-to-digital converter (ADC) system using a two-step conversion is disclosed. The ADC system is capable of achieving high sampling rate, low power consumption and low complexity. The new proposed ADC is formed by cascading a flash ADC having high sampling rate and low resolution with a successive approximation (SA) ADC having low power consumption and low sampling rate.
    Type: Application
    Filed: August 5, 2011
    Publication date: August 2, 2012
    Applicant: University of Macau
    Inventors: U-Fat CHIO, He-Gong Wei, Yan Zhu, Sai-Weng Sin, Seng-Pan U, Rui Paulo da Silva Martins, Franco Maloberti
  • Two-step channel selection for wireless transmitter front-ends
    Patent number: 8019290
    Abstract: A reconfigurable multimode transmitter is disclosed, operating in accordance with a two-step channel selection. The first step provides for a fine channel selection and upconversion of a desired channel to either positive or negative IF. The second step is a coarse channel selection and upconversion of a desired channel to the RF. The receiver and transmitter can be used in a transceiver.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: September 13, 2011
    Assignee: University of Macau
    Inventors: Pui-In Mak, Seng-Pan U, Rui Paulo da Silva Martins
  • Two-step channel selection for wireless receiver front-ends
    Patent number: 7529322
    Abstract: A reconfigurable receiver is disclosed, operating in accordance with a two-step channel selection. The first step provides for a coarse radio frequency (RF) channel selection, to downconvert a desired channel and an image channel of the desired channel to IF. The second step provides for a fine intermediate frequency (IF) channel selection to select either the desired channel or the image channel. The receiver can be used in a transceiver.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: May 5, 2009
    Assignee: University of Macau
    Inventors: Pui-In Mak, Seng-Pan U, Rui-Paulo da Silva Martins
  • TWO-STEP CHANNEL SELECTION FOR WIRELESS TRANSMITTER FRONT-ENDS
    Publication number: 20080318534
    Abstract: A reconfigurable multimode transmitter is disclosed, operating in accordance with a two-step channel selection. The first step provides for a fine channel selection and upconversion of a desired channel to either positive or negative IF. The second step is a coarse channel selection and upconversion of a desired channel to the RF. The receiver and transmitter can be used in a transceiver.
    Type: Application
    Filed: September 3, 2008
    Publication date: December 25, 2008
    Applicant: UNIVERSITY OF MACAU
    Inventors: Pui-In MAK, Seng-Pan U, Rui Paulo da Silva MARTINS
  • Two-step channel selection for wireless receiver and transmitter front-ends
    Publication number: 20070047669
    Abstract: A reconfigurable receiver, a reconfigurable transmitter and a multimode receiver are disclosed, operating in accordance with a two-step channel selection. In the receiver, the first step provides for a coarse radio frequency (RF) channel selection, to downconvert a desired channel and an image channel of the desired channel to IF. The second step provides for a fine intermediate frequency (IF) channel selection to select either the desired channel or the image channel. In the transmitter, the first step provides for a fine channel selection and upconversion of a desired channel to either positive or negative IF. The second step is a coarse channel selection and upconversion of a desired channel to the RF. The receiver and transmitter can be used in a transceiver.
    Type: Application
    Filed: August 26, 2005
    Publication date: March 1, 2007
    Inventors: Pui-In Mak, Seng-Pan U, Rui Paulo da Silva Martins