RESPONDER

PCT No. PCT/DE94/01141 Sec. 371 Date May 31, 1996 Sec. 102(e) Date May 31, 1996 PCT Filed Sep. 28, 1994 PCT Pub. No. WO95/10096 PCT Pub. Date Apr. 13, 1995For the digital data communication between a vehicle (transponder) and a beacon, an automatic gain control wherein the path attenuation between t...

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Bibliographische Detailangaben
Hauptverfasser:	OHLER MICHAEL, FISCHER HANS JURGEN, ROSSIUS HANS ULRICH, BODE FRIEDRICH WILHELM, VAHLE ANDREAS
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CALCULATING CHECKING-DEVICES COMPUTING CONTROL OF AMPLIFICATION COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FARE-REGISTERING APPARATUS FRANKING APPARATUS HANDLING RECORD CARRIERS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS TICKET-ISSUING APPARATUS TRANSMISSION
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Zusammenfassung:	PCT No. PCT/DE94/01141 Sec. 371 Date May 31, 1996 Sec. 102(e) Date May 31, 1996 PCT Filed Sep. 28, 1994 PCT Pub. No. WO95/10096 PCT Pub. Date Apr. 13, 1995For the digital data communication between a vehicle (transponder) and a beacon, an automatic gain control wherein the path attenuation between the transponder and the brake increases disproportionately with the distance. A two-stage automatic gain control is included for the gain control. After the first amplifier stage, the output signal is measured and supplied, together with a setpoint value contained in a setpoint memory, to a control amplifier. The output signal of the control amplifier is used both for automatically controlling the first amplifier stage, as well as the second amplifier stage. The automatic control makes it possible to cover only one single lane when automatically debiting highway tolls for a motor vehicle, for example. Influences caused by other motor vehicles on a nearby lane are eliminated.