BASE RECEIVING-TRANSMITTING STATION OF TRANSPONDER IDENTIFICATION SYSTEM AND METHOD OF PROTECTION OF RECEPTION PATH Russian patent published in 2000 - IPC

FIELD: radio engineering, antitheft systems of cars. SUBSTANCE: invention deals with protection of reception path of base station of transponder identification system against effect of pulse interference caused by short-term interruption of high- frequency field formed by generator of HF oscillations of base station. Proposed base receiving-transmitting station of transponder identification system has antenna LC circuit, generator of HF oscillations, identification device with first output controlling generator, reception path fitted with amplitude detector. Reception path is additionally fitted with electron key and identification device has additional second output. Electron key is placed in circuit of detector in series with load resistor, controlling output of key is connected to second output of identification device. Proposed method of protection of reception path of receiving-transmitting station that incorporates series amplitude detector consists in switching off of reception path for period of exposure to interference by way of increase of resistance of load of series amplitude detector. . EFFECT: usage of base station with transponders having different time of delay of response to interrogation of station protects its reception path against pulse interference. 2 cl, 1 dwg