Patents by Inventor Juha K. Maatta

Juha K. Maatta 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).

  • Method and circuitry for high power amplifiers with voltage conversion to avoid performance degradation, system shutdown and permanent damage in case of worst case data pattern
    Patent number: 7046973
    Abstract: A power amplification system for wireless communications monitors wireless signal sequences for worst case or problematic data patterns likely to cause the output voltage of a voltage converter supplying the power amplifier to drop. The signal sequences, which may be data within a single timeslot or data packet or across several timeslots or data packets, are detected by monitoring data patterns, either alone or in conjunction with monitoring voltage, current, or a combination of voltage and current drawn by the power amplifier. Upon detection of triggering signal sequences, the output power level is reduced, either digitally by dropping the output power one or more power levels or in an analog fashion by reducing reference voltages. Monitoring and control units may be included within the voltage converter, the power amplifier, a baseband modulator, and/or a transmission line-up unit.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: May 16, 2006
    Assignee: Nokia Corporation
    Inventors: Veli-Pekka Ketonen, Juha K. Maatta
  • Method and circuitry for high power amplifiers with voltage conversion to avoid performance degradation, system shutdown and permanent damage in case of worst case data pattern
    Publication number: 20020183023
    Abstract: A power amplification system for wireless communications monitors wireless signal sequences for worst case or problematic data patterns likely to cause the output voltage of a voltage converter supplying the power amplifier to drop. The signal sequences, which may be data within a single timeslot or data packet or across several timeslots or data packets, are detected by monitoring data patterns, either alone or in conjunction with monitoring voltage, current, or a combination of voltage and current drawn by the power amplifier. Upon detection of triggering signal sequences, the output power level is reduced, either digitally by dropping the output power one or more power levels or in an analog fashion by reducing reference voltages. Monitoring and control units may be included within the voltage converter, the power amplifier, a baseband modulator, and/or a transmission line-up unit.
    Type: Application
    Filed: June 1, 2001
    Publication date: December 5, 2002
    Inventors: Veli-Pekka Ketonen, Juha K. Maatta