Patents by Inventor Jean P. Bertails

Jean P. Bertails 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).

  • Integrated circuit amplifier functioning in class AB and incorporating CMOS (metal oxide semiconductor) technology
    Patent number: 4419631
    Abstract: This invention concerns an integrated-circuit amplifier incorporating CMOS (metal oxide semiconductor) technology, which amplifiers are capable of supplying a standardized 600 Ohm load, for example.This amplifier functions in class AB, and its output stage comprises an NPN bipolar transistor and an N-channel MOS transistor, connected in series in the same way as a conventional push-pull stage.The NPN transistor is controlled directly at its base by the signal for amplification. The control grid of the MOS transistor receives the output signal from a differential amplifier, one input of which is connected to the amplifier output S, the other input being connected to the emitter of another bipolar transistor, the base of which receives the signal for amplification.
    Type: Grant
    Filed: October 22, 1981
    Date of Patent: December 6, 1983
    Assignee: Societe pour l'Etude et la Fabrication des Circuits Integres Speciaux (EFCIS)
    Inventors: Jean P. Bertails, Cristian Perrin, Louis Tallaron