Patents by Inventor John Vasa

John Vasa 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).

  • Patent number: 9144042
    Abstract: A circuit includes a transmit path to receive an input signal and generate an output signal to be output at a transmit power level according to a power target signal. The circuit also includes a gain corrector to output a signal for adjusting a power level of the output signal to correspond to the transmit power level. The signal for adjusting is based on the power target signal and a delay for time-aligning a first signal and a second signal.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: September 22, 2015
    Assignee: MARVELL WORLD TRADE LTD.
    Inventors: Nader Damavandi, Rony Ashkenazi, Alexander Zaslavsky, John Vasa
  • Publication number: 20140141730
    Abstract: A circuit includes a transmit path to receive an input signal and generate an output signal to be output at a transmit power level according to a power target signal. The circuit also includes a gain corrector to output a signal for adjusting a power level of the output signal to correspond to the transmit power level. The signal for adjusting is based on the power target signal and a delay for time-aligning a first signal and a second signal.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Applicant: Marvell World Trade Ltd.
    Inventors: Nader DAMAVANDI, Rony ASHKENAZI, Alexander ZASLAVSKY, John VASA
  • Publication number: 20070129025
    Abstract: An on-chip calibration system comprises a transmitter, a receiver, a phase and amplitude determination element configured to determine amplitude and phase characteristics of an output signal generated in the transmitter, the signal representing transmitter characteristics, an amplitude comparison element configured to compare the signal representing transmitter characteristics with a desired amplitude signal and generate an amplitude compensation signal, an AM predistortion element configured to modify an ideal AM signal with the amplitude compensation signal, a phase comparison element configured to compare the signal representing transmitter characteristics with a desired phase signal and generate a phase compensation signal, and a PM predistortion element configured to modify an ideal phase signal with the phase compensation signal.
    Type: Application
    Filed: December 1, 2005
    Publication date: June 7, 2007
    Inventors: John Vasa, William Domino, Norman Beamish, Morten Damgaard
  • Publication number: 20060246862
    Abstract: A local oscillator circuit for generating a local frequency signal is provided. The local oscillator circuit may cooperate with a radio circuit for providing wireless reception or transmission. The radio circuit performs modulation or demodulation processes with reference to a defined carrier signal frequency. The local oscillator circuit has a voltage controlled oscillator that generates a VCO signal at frequency different than the carrier frequency. A frequency scaling circuit applies a scaling factor to the VCO signal, with the scaled signal generated at the frequency of the defined carrier frequency.
    Type: Application
    Filed: April 27, 2005
    Publication date: November 2, 2006
    Inventors: Bipul Agarwal, John Vasa, David Yates, Chang-hyeon Lee, Aravind Loke
  • Publication number: 20060246942
    Abstract: A receiver for a multi-mode wireless device is provided. The receiver has multiple analog RF front end modules, with each module supporting a different mode of operation. The receiver has a single digital backend module for generating a digital baseband signal. A controller selects one of the available RF modules to use, and the selected RF module provides an analog communication signal to the digital backend. Each available mode has an associated set of factors. When a particular mode is selected, the set of factors associated with the selected mode is provided to the digital backend. The digital backend uses these factors to adjust the processing characteristics of its components, such as its analog to digital converter, filters, and gain controller. In this way, the single digital backend is adaptable to the requirements of each of the available radio modes.
    Type: Application
    Filed: April 27, 2005
    Publication date: November 2, 2006
    Inventors: Balasubramanian Ramachandran, John Vasa, Tudor Lipan, Norman Beamish
  • Publication number: 20060068749
    Abstract: A low noise filter is arranged to receive an input signal from a downconverter. The low noise filter is constructed to block or cancel any DC offset in the input signal, as well as filter selected frequency components from the input signal. The low noise filter uses a shared capacitor both to handle the DC offset and to set filter response characteristics. As the low noise filter is implemented with a Frequency Dependent Negative Resistance (FDNR) device, the shared capacitor may be relatively small. The low noise filter has a load capacitor, with the output of the load capacitor coupled to a bias resistor and voltage. This bias structure cooperates with the load capacitor to set a high cutoff frequency for the low noise filter useful for blocking or canceling the DC offset.
    Type: Application
    Filed: September 25, 2004
    Publication date: March 30, 2006
    Inventors: Aly Ismail, John Vasa, Balasubramanian Ramachandran
  • Publication number: 20050225388
    Abstract: A system and method for direct current offset correction are disclosed. One embodiment of the system includes a direct current offset correction circuitry having an adjustable bandwidth and control logic configured to effect a bandwidth change of the direct current offset correction circuitry to speed up warm-up and settling time of the direct current offset correction circuitry.
    Type: Application
    Filed: April 13, 2004
    Publication date: October 13, 2005
    Inventors: Bala Ramachandran, John Vasa