Patents by Inventor Ram P. Aditham

Ram P. Aditham 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).

  • Polar modulation apparatus and method with common-mode control
    Patent number: 8736395
    Abstract: The present invention relates to a polar modulation apparatus and method, in which a polar-modulated signal is generated based on separately processed phase modulation (PM) and amplitude modulation (AM) components of an input signal. An amplified polar modulated output signal is generated in accordance with the phase modulation and amplitude modulation components by using a differential power amplifier circuitry(30) and supplying an amplified phase modulation component to a differential input of the differential power amplifier circuitry(30). A bias input of the differential power amplifier circuitry(30) is controlled based on the amplitude modulation component, so as to modulate a common-mode current of the differential power amplifier circuitry(30). Thereby, a new concept of a polar modulator with static DC-DC converter and power and/or efficiency and/or linearity controlled output power amplifier can be achieved.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: May 27, 2014
    Assignee: NXP, B.V.
    Inventors: Mihai A. T Sanduleanu, Ram P. Aditham, Eduard F. Stikvoort
  • POLAR MODULATION APPARATUS AND METHOD WITH COMMON-MODE CONTROL
    Publication number: 20120119840
    Abstract: The present invention relates to a polar modulation apparatus and method, in which a polar-modulated signal is generated based on separately processed phase modulation (PM) and amplitude modulation (AM) components of an input signal. An amplified polar modulated output signal is generated in accordance with the phase modulation and amplitude modulation components by using a differential power amplifier circuitry(30) and supplying an amplified phase modulation component to a differential input of the differential power amplifier circuitry(30). A bias input of the differential power amplifier circuitry(30) is controlled based on the amplitude modulation component, so as to modulate a common-mode current of the differential power amplifier circuitry(30). Thereby, a new concept of a polar modulator with static DC-DC converter and power and/or efficiency and/or linearity controlled output power amplifier can be achieved.
    Type: Application
    Filed: December 21, 2011
    Publication date: May 17, 2012
    Inventors: Mihai A.T SANDULEANU, Ram P. ADITHAM, Eduard F. STIKVOORT
  • Polar modulation apparatus and method with common-mode control
    Patent number: 8106720
    Abstract: The present invention relates to a polar modulation apparatus and method, in which a polar-modulated signal is generated based on separately processed phase modulation (PM) and amplitude modulation (AM) components of an input signal. An amplified polar modulated output signal is generated in accordance with the phase modulation and amplitude modulation components by using a differential power amplifier circuitry and supplying an amplified phase modulation component to a differential input of the differential power amplifier circuitry. A bias input of the differential power amplifier circuitry is controlled based on the amplitude modulation component, so as to modulate a common-mode current of the differential power amplifier circuitry. Thereby, a new concept of a polar modulator with static DC-DC converter and power and/or efficiency and/or linearity controlled output power amplifier can be achieved.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: January 31, 2012
    Assignee: NXP B.V.
    Inventors: Mihai A. T. Sanduleanu, Ram P. Aditham, Eduard F. Stikvoort
  • POLAR MODULATION APPARATUS AND METHOD WITH COMMON-MODE CONTROL
    Publication number: 20090219105
    Abstract: The present invention relates to a polar modulation apparatus and method, in which a polar-modulated signal is generated based on separately processed phase modulation (PM) and amplitude modulation (AM) components of an input signal. An amplified polar modulated output signal is generated in accordance with the phase modulation and amplitude modulation components by using a differential power amplifier circuitry (30) and supplying an amplified phase modulation component to a differential input of the differential power amplifier circuitry (30). A bias input of the differential power amplifier circuitry (30) is controlled based on the amplitude modulation component, so as to modulate a common-mode current of the differential power amplifier circuitry (30). Thereby, a new concept of a polar modulator with static DC-DC converter and power and/or efficiency and/or linearity controlled output power amplifier can be achieved.
    Type: Application
    Filed: November 1, 2006
    Publication date: September 3, 2009
    Applicant: NXP B.V.
    Inventors: Mihai A.T Sanduleanu, Ram P. Aditham, Eduard F. Stikvoort