Patents by Inventor Jeffrey Hinrichs

Jeffrey Hinrichs 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: 9425747
    Abstract: A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: August 23, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Seyfollah Bazarjani, Guoqing Miao, Joseph R. Fitzgerald, Prajakt V. Kulkarni, Justin Joseph Rosen Gagne, Gene H. McAllister, Jeffrey Hinrichs, Jan Paul van der Wagt
  • Patent number: 8503695
    Abstract: A digital offset is combined with an audio signal in the digital domain to cancel an output offset caused by one or more analog components processing the same audio signal. In this manner, the offset at the output of the audio signal path (e.g., at a power amplifier output) is reduced or eliminated. Consequently, audible artifacts, such as click-and-pop artifacts, can be reduced or eliminated. In audio devices operating in ground-referenced capless mode, power consumption is reduced because of reduced or eliminated direct current (DC) leakage current through speakers or headsets of such audio devices. In some circumstances, the digital offset in the digital domain may be applied at substantially all times of operation of the audio signal path.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: August 6, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Uma Chilakapati, Seyfollah Bazarjani, Joseph Fitzgerald, Guoqing Miao, Hui-Ya Nelson, Khalid Sidiqi, Jeffrey Hinrichs
  • Publication number: 20090220110
    Abstract: A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
    Type: Application
    Filed: March 3, 2008
    Publication date: September 3, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventors: Seyfollah Bazarjani, Guoqing Miao, Joseph R. Fitzgerald, Prajakt V. Kulkarni, Justin Joseph Rosen Gagne, Gene H. McAllister, Jeffrey Hinrichs, Jan Paul van der Wagt
  • Publication number: 20070046366
    Abstract: An integrated circuit (IC) resonator in which resonator parameters potentially affected by IC fabrication processes are correctable after fabrication. Resonance frequency tuning is effected by forming each feedback capacitor in a pair of integrator circuits to include a variable capacitance device, such as a varactor diode. A tuning signal is applied to the varactor diode to adjust the total capacitance value and, therefore, the resonance frequency. Similarly, the quality (Q) factor of the resonator is adjusted by providing a variable capacitance in an RC (resistance-capacitance) network coupling the output of one of the integrator circuits to the input of the other. The variable capacitance in the RC network permits adjustment of phase in the event that the integrator circuits do not provide a desired 180° total phase shift.
    Type: Application
    Filed: August 10, 2005
    Publication date: March 1, 2007
    Inventors: Jeffrey Hinrichs, William Goyette
  • Publication number: 20070035425
    Abstract: Apparatus, and a related method, for converting digital signals directly to radio-frequency (RF) analog signals. The apparatus includes a single high-speed delta-sigma modulator and an integrated upsampler that increases the data rate of digital input samples by a selected factor, such as nine times. The delta-sigma modulator is configured to include a feedback multiplier coefficients that are selected to greatly facilitate operation of associated adders. At least one critical adder includes a carry-select adder modification that further speeds up the add operation and ensures that the apparatus operates at desirably high frequencies.
    Type: Application
    Filed: August 10, 2005
    Publication date: February 15, 2007
    Inventors: Jeffrey Hinrichs, Harry Harberts