Patents by Inventor Gregory J. Zandt

Gregory J. Zandt 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 system for automatically detecting and powering PC speakers
    Patent number: 7099481
    Abstract: A method of powering an audio output device of a computer system, by determining whether a passive or active audio output device is connected to an audio output jack of the computer system and, based on this determination, providing an appropriate power level to the audio output jack. For example, if the determination is made that a passive audio output device is connected to the audio output jack, then a 3-watt power signal is applied to the audio output jack, but if the determination is made that an active audio output device is connected to the audio output jack, then a ΒΌ-watt power signal is applied to the audio output jack. The type of audio output device present may be determined by sensing an impedance at the audio output jack. This sensing may be performed by comparing a load voltage associated with the impedance to a reference voltage.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: August 29, 2006
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Brian A. Baker, Mark A. Casparian, Kenneth S. Seethaler, Gregory J. Zandt
  • Method and system for automatically detecting and powering PC speakers
    Publication number: 20020172371
    Abstract: A method of powering an audio output device of a computer system, by determining whether a passive or active audio output device is connected to an audio output jack of the computer system and, based on this determination, providing an appropriate power level to the audio output jack. For example, if the determination is made that a passive audio output device is connected to the audio output jack, then a 3-watt power signal is applied to the audio output jack, but if the determination is made that an active audio output device is connected to the audio output jack, then a ¼-watt power signal is applied to the audio output jack. The type of audio output device present may be determined by sensing an impedance at the audio output jack. This sensing may be performed by comparing a load voltage associated with the impedance to a reference voltage.
    Type: Application
    Filed: May 15, 2001
    Publication date: November 21, 2002
    Inventors: Brian A. Baker, Mark A. Casparian, Kenneth S. Seethaler, Gregory J. Zandt