Patents by Inventor Fares K. Maarouf

Fares K. Maarouf 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).

  • Apparatus to implement symmetric single-ended termination in differential voltage-mode drivers
    Patent number: 8760189
    Abstract: A differential voltage mode driver for implementing symmetric single ended termination includes an output driver circuitry having a predefined termination impedance. The differential voltage mode driver also includes an output driver replica having independently controlled first and second portions. The first and second portions are independently controlled to establish a substantially equal on-resistance of the first and the second portions. The output driver replica controls the predefined termination impedance of the output driver circuitry.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: June 24, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Cheng Zhong, Vannam Dang, Miao Li, Fares K. Maarouf, Tirdad Sowlati
  • Pre-emphasis technique for on-chip voltage-driven single-ended-termination drivers
    Patent number: 8446168
    Abstract: A transmitter configured for pre-emphasis is described. The transmitter includes a voltage-driven single-ended-termination driver circuitry. The voltage-driven single-ended-termination driver circuitry includes a first termination point and a second termination point. The transmitter also includes a pre-emphasis encoder circuitry. The pre-emphasis encoder circuitry receives a pre-emphasis signal. The transmitter may reduce signal loss in transmission lines by detecting a transition in a data stream, adjusting a source determination resistance and obtaining a gain from the adjusted source determination resistance.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: May 21, 2013
    Assignee: QUALCOMM, Incorporated
    Inventor: Fares K. Maarouf
  • Apparatus to Implement Symmetric Single-Ended Termination in Differential Voltage-Mode Drivers
    Publication number: 20130082744
    Abstract: A differential voltage mode driver for implementing symmetric single ended termination includes an output driver circuitry having a predefined termination impedance. The differential voltage mode driver also includes an output driver replica having independently controlled first and second portions. The first and second portions are independently controlled to establish a substantially equal on-resistance of the first and the second portions. The output driver replica controls the predefined termination impedance of the output driver circuitry.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Cheng Zhong, Vannam Dang, Miao Li, Fares K. Maarouf, Tirdad Sowlati
  • PRE-EMPHASIS TECHNIQUE FOR ON-CHIP VOLTAGE-DRIVEN SINGLE-ENDED-TERMINATION DRIVERS
    Publication number: 20120146686
    Abstract: A transmitter configured for pre-emphasis is described. The transmitter includes a voltage-driven single-ended-termination driver circuitry. The voltage-driven single-ended-termination driver circuitry includes a first termination point and a second termination point. The transmitter also includes a pre-emphasis encoder circuitry. The pre-emphasis encoder circuitry receives a pre-emphasis signal. The transmitter may reduce signal loss in transmission lines by detecting a transition in a data stream, adjusting a source determination resistance and obtaining a gain from the adjusted source determination resistance.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 14, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventor: Fares K. Maarouf