Patents by Inventor Alexander Petrus Gerardus Lubbers

Alexander Petrus Gerardus Lubbers 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).

  • Operational amplifier with class-AB+B output stage
    Patent number: 6788147
    Abstract: An amplifier comprising: 1) a class-AB push-pull stage comprising a first P-channel output transistor and a first N-channel output transistor for driving an output load; and 2) a class-B current booster stage coupled in parallel with the class-AB push-pull stage comprising a second P-channel output transistor and a second N-channel output transistor for driving the output load. The small class-AB transistors have a minimum quiescent transconductance. The class-B current booster transistors are inactive in the quiescent state, but deliver large currents for output voltages approaching the power supply rails.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: September 7, 2004
    Assignee: National Semiconductor Corporation
    Inventor: Alexander Petrus Gerardus Lubbers