Patents by Inventor Massimo Bertagna

Massimo Bertagna 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).

  • Arrangement for controlling the amplitude of an electric signal for a digital electronic apparatus and corresponding method of control
    Patent number: 4903302
    Abstract: In a digital system for amplitude modulation, the logical signal at acoustic frequency is modulated by means of an ultrasonic frequency signal, the duty-cycle of which can be varied by means of a program. More particularly, the modulating signal is generated by a cyclic counter. The duty-cycle is programmed by writing the corresponding numerical value to a register with a capacity equal to that of the counter. An adder, adding the value of the counter each time to that of the register, generates a carry signal which gives consent to the acoustic signal only for a part of the relative cycle of the modulating signal.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: February 20, 1990
    Assignee: Ing. C. Olivetti & C., S.p.A.
    Inventors: Alessandro Graciotti, Massimo Bertagna