Patents by Inventor Antenor Capelli Junior

Antenor Capelli Junior 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).

  • Circuit for driving inductive sensors for reading and debiting prepaid cards
    Patent number: 6050488
    Abstract: A read/write head circuit that insures the equivalence between the driving signal frequency and the resonance of the tank made up of an inductive sensor in parallel with a capacitor. The invention makes use of a voltage controlled oscillator (38)--VCO--to generate synchronism pulses (54) from the driving current generator (33), the controlling voltage being obtained from the comparison between the driving current and voltage phases through the resonant tank made up of the sensor (11) and capacitor (17) connected in parallel. The circuit further provides an amplitude limitation of the driving signal through the control of the driving current pulses applied to the inductive sensor.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: April 18, 2000
    Assignee: Telecomunicacoes Brasileiras S/A - Telebras
    Inventors: Felipe Ricardo Clayton, Narcizo Sabattini Junior, Antenor Capelli Junior, Manuel Augusto Miranda dos Santos Pato