Device for transmitting data or energy

Details Device for transmitting data or energy Device for transmitting data or energy

1997-01-23

1998-08-18

Sircus, Brian

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307 104, 34082534, 34082554, 34082569, 34082572, 701 2, 342 52, G01S 1374

Patent

active

057961808

ABSTRACT:
A device for transmitting data or energy supply from or to a transponder, especially for an anti-theft system in a motor vehicle, includes an antenna oscillating circuit which is induced to oscillate by an exciter variable. The oscillation is transmitted by transformer coupling to a transponder oscillating circuit. In order to make the transmission of energy or data as effective as possible, the current or the voltage in the antenna oscillating circuit is measured and compared with a desired variable. Upon a deviation, a correction value is generated by which the exciter current is increased or the resonant frequency is adapted to the exciter frequency as a consequence of the addition of an impedance to the antenna oscillating circuit.

REFERENCES:
patent: 3613060 (1971-10-01), Legrand
patent: 5153583 (1992-10-01), Murdoch
patent: 5287112 (1994-02-01), Schuermann

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