Patents by Inventor Ahmed N. Mohieldin

Ahmed N. Mohieldin 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).

  • High frequency tunable filter
    Patent number: 6646498
    Abstract: An integrated circuit (ICT) comprising a filter (50). The filter comprises an input (&ugr;in+) for receiving an input signal and an output (56) for producing an output signal having a frequency cutoff point. The filter further comprises at least one resistor network (RN1) coupled between the input and the output. The resistor network comprises a first non-switched resistance (R1.1) and a first resistance series connection connected in parallel with the first non-switched resistance. The first resistance series connection comprises a switched resistance (R1.2) connected in series with a source/drain path of a switching transistor (TRR1.2), the switching transistor having a gate for receiving a control signal. The frequency cutoff point is adjustable in response to the control signal. Additionally, the switched resistance has a first resistance and the switching transistor has an on-resistance. Further, the on-resistance is at least 20 percent of the total of the first resistance and the on-resistance.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: November 11, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: Ahmed N. Mohieldin, Abdellatif Bellaouar, Sherif Embabi, Michel Frechette
  • High frequency tunable filter
    Publication number: 20030132797
    Abstract: An integrated circuit (ICT) comprising a filter (50). The filter comprises an input (&ngr;in+) for receiving an input signal and an output (56) for producing an output signal having a frequency cutoff point. The filter further comprises at least one resistor network (RN1) coupled between the input and the output. The resistor network comprises a first non-switched resistance (R1.1) and a first resistance series connection connected in parallel with the first non-switched resistance. The first resistance series connection comprises a switched resistance (R1.2) connected in series with a source/drain path of a switching transistor (TRR1.2), the switching transistor having a gate for receiving a control signal. The frequency cutoff point is adjustable in response to the control signal. Additionally, the switched resistance has a first resistance and the switching transistor has an on-resistance. Further, the on-resistance is at least 20 percent of the total of the first resistance and the on-resistance.
    Type: Application
    Filed: December 18, 2001
    Publication date: July 17, 2003
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Ahmed N. Mohieldin, Abdellatif Bellaouar, Sherif Embabi, Michel Frechette