Transponder for half-duplex communication

Details Transponder for half-duplex communication Transponder for half-duplex communication

1998-11-19

2000-10-03

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

327408, 343720, 343745, 343749, G08B 2102

Patent

active

061279293

ABSTRACT:
A transponder (30), intended to exchange data during a half duplex communication, includes a coil (3), a capacitor (8) connected to the coil to form a resonant circuit, and processing means (33) arranged to process the data. The transponder further includes switching means (32) arranged so that, under the control of the processing means, the switching means connect the processing means in series with the capacitor and the coil which are connected to form, during the entire duration of the reception phase, a parallel LC circuit and, during the entire duration of the transmission phase, a series LC circuit to optimize the electric power exchanged between an antenna and the processing means.

REFERENCES:
patent: 3602738 (1971-08-01), Bohm
patent: 5099227 (1992-03-01), Geiszler et al.
patent: 5105190 (1992-04-01), Kip et al.
patent: 5517179 (1996-05-01), Charlot, Jr.

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