Inductive device for the rapid exchange of data between two data

Details Inductive device for the rapid exchange of data between two data Inductive device for the rapid exchange of data between two data

1988-03-01

1989-09-05

Griffin, Robert L.

Telecommunications

Transmitter and receiver at separate stations

Short range rf communication

455 83, 455193, H04B 500

Patent

active

048646334

ABSTRACT:
An inductive device is provided for the rapid data exchange between two data carriers, more particularly between a fixed station and a movable carrier, usable in industrial process automation systems an automatic tuning circuit is provided for maintaining the frequency of the resonating circuit of the inductive device at a nominal value; the tuning circuit includes a comparator means which compares a signal representative of the frequency of the circuit with a reference value. A tuning means receives from the comparator an error signal so as to cause the frequency of the resonating circuit to return to its nominal value.

REFERENCES:
patent: 3656132 (1972-04-01), Brumbelow
patent: 4172995 (1979-10-01), Yoshisato
patent: 4462113 (1984-07-01), Iwata
patent: 4520474 (1985-05-01), Vilmur
patent: 4550444 (1985-10-01), Uebel
patent: 4669109 (1987-05-01), Le Cheviller et al.

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