Patents by Inventor Muthusamy Kumarasamy Raja

Muthusamy Kumarasamy Raja 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).

  • Variable gain low noise amplifier
    Patent number: 6819179
    Abstract: The load of the cascode amplifier is varied by connecting another (secondary) load in parallel with the original load. The secondary load is connected through a MOSFET switch. During the High Gain Mode the MOSFET switch is OFF and the secondary load is electrically isolated from the main load, whereas in the Low Gain Mode the switch is turned ON and the secondary load appears across the primary load, reducing the effective load impedance. The secondary load is AC coupled such that the DC bias current does not pass through the secondary load and hence the Noise Figure (NF) and linearity (IIP3) performance are better in the Low Gain Mode. A number of such switchable loads can be connected across the load to obtain programmability.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: November 16, 2004
    Assignee: Agency for Science, Technology and Research
    Inventors: Muthusamy Kumarasamy Raja, Nuntha Kumar Krishnasamy Maniam
  • VARIABLE GAIN LOW NOISE AMPLIFIER
    Publication number: 20040207471
    Abstract: The load of the cascode amplifier is varied by connecting another (secondary) load in parallel with the original load. The secondary load is connected through a MOSFET switch. During the High Gain Mode the MOSFET switch is OFF and the secondary load is electrically isolated from the main load, whereas in the Low Gain Mode the switch is turned ON and the secondary load appears across the primary load, reducing the effective load impedance. The secondary load is AC coupled such that the DC bias current does not pass through the secondary load and hence the Noise Figure (NF) and linearity (IIP3) performance are better in the Low Gain Mode. A number of such switchable loads can be connected across the load to obtain programmability.
    Type: Application
    Filed: April 16, 2003
    Publication date: October 21, 2004
    Applicant: Agency For Science, Technolgoy and Research
    Inventors: Muthusamy Kumarasamy Raja, Nuntha Kumar S/O Krishnasamy Maniam