Abstract: A device for detection of a signal of passive RFID chips comprising an antenna for transmitting a source radio signal and receiving a RFID chip radio signal, a peak detector, filters and bit decoders adapted to filter and decode signals with different types of modulation including amplitude, frequency, and phase modulation, and a computing unit. The device further comprises at least a first and a second parallel branch, with a signal processed by the peak detector fed to the input of these branches and the output of these branches connected to the computing unit. The first and the second branch consecutively comprise a filter and a bit decoder, wherein the filter and the bit decoder of the first branch are adapted to process the signal modulated by the first type of modulation, the filter and the bit decoder of the second branch are adapted to process the signal modulated by the second type of modulation.

Abstract: The subject of the invention Is a method of processing a signal of a passive RFID chip (1) with a reader (2) in order to amplify the useful signal. A method of processing a signal of a passive RFID chip (1) with a reader (2) comprising an antenna (3), an operational amplifier (4), an AD converter (5) and a first DA converter (6) and a second DA converter (7) or a source of constant voltage consists of steps of transmitting the source signal of the antenna (3), receiving the source signal of the antenna (3) by the RFID chip (1), transmitting the RFID chip (1) signal and receiving the RFID chip (1) signal by the antenna (3), wherein the received RFID chip (1) signal and the output of the first DA converter (6) is fed to the inverting input of the operational amplifier (4) and the output of the second DA converter (7) or the output of the source of constant voltage is fed to the non-inverting input of the operational amplifier (4).