Patents by Inventor Steven Mollenkopf

Steven Mollenkopf 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).

  • Wireless communications transceiver: transmitter using a harmonic rejection mixer and an RF output offset phase-locked loop in a two-step up-conversion architecture and receiver using direct conversion architecture
    Patent number: 7167686
    Abstract: A wireless transceiver includes a transmitter having a harmonic rejection mixer and an RF output phase-locked loop in a two step up-conversion architecture, and a direct conversion receiver. The transmitter includes a local oscillator for producing a signal at a multiple of an intermediate frequency, a quadrature modulator harmonic rejection mixer responsive to the signal at the multiple of the intermediate frequency for modulating in-phase and quadrature-phase base-band signals to produce an intermediate frequency signal, a filter responsive to the intermediate frequency signal for producing a filtered intermediate frequency signal, and an RF output offset phase-locked loop responsive to the filtered intermediate frequency signal and the signal at the multiple of the intermediate frequency for producing an RF transmission signal. The harmonic rejection mixer reduces filtering requirements to facilitate a high level of circuit integration.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: January 23, 2007
    Assignee: Qualcomm Incorporated
    Inventors: Puay-Hoe Andrew See, James Jaffee, Steven Mollenkopf, Sandor Szabo
  • Wireless communications transceiver: transmitter using a harmonic rejection mixer and an RF output offset phase-locked loop in a two-step up-conversion architecture & receiver using direct conversion architecture
    Publication number: 20040005869
    Abstract: A wireless transceiver includes a transmitter having a harmonic rejection mixer and an RF output phase-locked loop in a two step up-conversion architecture, and a direct conversion receiver. The transmitter includes a local oscillator for producing a signal at a multiple of an intermediate frequency, a quadrature modulator harmonic rejection mixer responsive to the signal at the multiple of the intermediate frequency for modulating in-phase and quadrature-phase base-band signals to produce an intermediate frequency signal, a filter responsive to the intermediate frequency signal for producing a filtered intermediate frequency signal, and an RF output offset phase-locked loop responsive to the filtered intermediate frequency signal and the signal at the multiple of the intermediate frequency for producing an RF transmission signal. The harmonic rejection mixer reduces filtering requirements to facilitate a high level of circuit integration.
    Type: Application
    Filed: January 24, 2003
    Publication date: January 8, 2004
    Applicant: QUALCOMM Incorporaton
    Inventors: Puay-Hoe Andrew See, James Jaffee, Steven Mollenkopf, Sandor Szabo
  • System and method for estimating power
    Patent number: 6496536
    Abstract: A system and method for estimating the power of a signal. The signal is compared to and separated into a plurality of ranges. Each range is assigned a particular output value. The output values approximate the square of the input signal based on known characteristics of the input signal. A low pass filter is used to average a plurality of the output values.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: December 17, 2002
    Assignee: Qualcomm, Incorporated
    Inventor: Steven Mollenkopf
  • SYSTEM AND METHOD FOR ESTIMATING POWER
    Publication number: 20020118725
    Abstract: A system and method for estimating the power of a signal. The signal is compared to and separated into a plurality of ranges. Each range is assigned a particular output value. The output values approximate the square of the input signal based on known characteristics of the input signal. A low pass filter is used to average a plurality of the output values.
    Type: Application
    Filed: March 25, 1999
    Publication date: August 29, 2002
    Inventor: STEVEN MOLLENKOPF
  • System and method for gain control of individual narrowband channels using a wideband power measurement
    Patent number: 6377786
    Abstract: The present invention comprises a system and method for gain control of individual narrowband channels using a wideband power measurement. The present invention comprises a transmit power tracking loop which controls the power of the transmitted signal by controlling the gain applied to the signal. The function of the transmit power tracking loop is to measure power, accept commands for power adjustment, and adjust the power. Gain control is performed by producing an error signal using the comparison of measurements of a total of estimated powers of each narrowband signal and a measurement of the modulated wideband signal. In addition, open loop control is performed by accepting open loop commands generated by an algorithm.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: April 23, 2002
    Assignee: Qualcomm, Inc.
    Inventors: Steven Mollenkopf, James H. Thompson
  • System and method for gain control of individual narrowband channels using a wideband power measurement
    Publication number: 20010026579
    Abstract: The present invention comprises a system and method for gain control of individual narrowband channels using a wideband power measurement. The present invention comprises a transmit power tracking loop which controls the power of the transmitted signal by controlling the gain applied to the signal. The function of the transmit power tracking loop is to measure power, accept commands for power adjustment, and adjust the power. Gain control is performed by producing an error signal using the comparison of measurements of a total of estimated powers of each narrowband signal and a measurement of the modulated wideband signal. In addition, open loop control is performed by accepting open loop commands generated by an algorithm.
    Type: Application
    Filed: April 9, 2001
    Publication date: October 4, 2001
    Applicant: Qualcomm, Inc.
    Inventors: Steven Mollenkopf, James H. Thompson
  • System and method for gaining control of individual narrowband channels using a wideband power measurement
    Patent number: 6252915
    Abstract: The present invention comprises a system and method for gain control of individual narrowband channels using a wideband power measurement. The present invention comprises a transmit power tracking loop which controls the power of the transmitted signal by controlling the gain applied to the signal. The function of the transmit power tracking loop is to measure power, accept commands for power adjustment, and adjust the power. Gain control is performed by producing an error signal using the comparison of measurements of a total of estimated powers of each narrowband signal and a measurement of the modulated wideband signal In addition, open loop control is performed by accepting open loop commands generated by an algorithm.
    Type: Grant
    Filed: September 9, 1998
    Date of Patent: June 26, 2001
    Assignee: Qualcomm Incorporated
    Inventors: Steven Mollenkopf, James H. Thompson