Patents by Inventor Alexander George Welti

Alexander George Welti 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).

  • Bidirectional, variable-impedance instrument-level to professional-level audio interface with signal splitters and balanced DC power
    Patent number: 8416967
    Abstract: An audio frequency variable-impedance instrument-level to professional-level audio interface with balanced DC power, comprising a unique arrangement of electronic elements, consisting of the musical instrument-level signal splitter with professional-level audio output interface 10, the professional-level signal splitter to instrument-level interface 12 and the power supply with regulation, innovative new DC balancing and power distribution 14. The innovation of balanced DC power effectively cancels the unwanted power supply noise on professional audio electronics giving greatly improved distortion and lower noise specifications over previous designs.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: April 9, 2013
    Inventor: Alexander George Welti
  • Bidirectional, variable-impedance instrument-level to professional-level audio interface with signal splitters and balanced DC power
    Publication number: 20090323988
    Abstract: An audio frequency variable-impedance instrument-level to professional-level audio interface with balanced DC power, comprising a unique arrangement of electronic elements, consisting of the musical instrument-level signal splitter with professional-level audio output interface 10, the professional-level signal splitter to instrument-level interface 12 and the power supply with regulation, innovative new DC balancing and power distribution 14. The innovation of balanced DC power effectively cancels the unwanted power supply noise on professional audio electronics giving greatly improved distortion and lower noise specifications over previous designs.
    Type: Application
    Filed: February 24, 2009
    Publication date: December 31, 2009
    Inventor: Alexander George Welti
  • Current-regulated, bootstrapped-biased, high to low impedance signal-buffer/output-driver for audio electronics
    Publication number: 20080068049
    Abstract: An audio frequency buffer device comprising a unique arrangement of electronic elements, intended long battery operation, consisting of the current-buffer stage (18) with the current regulator (30) and the boot-strapped bias arrangement (16); and the current-driver stage (20) with the current regulator (32); the combination of two current regulators (30) and (32) gives improved distortion and lower noise specifications; and the boot-strapped bias arrangement (16) gives improved impedance specifications over previous designs.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 20, 2008
    Inventor: Alexander George Welti