Abstract: An electronic circuit (12, 12?) for a reader device (10, 10?) for contactless communication with a transponder (20) is disclosed. The electronic circuit (12, 12?) comprises a connection (13a, 13b) to an antenna (11) of said reader device (10, 10?), which antenna (11) is designed for receiving a radio signal (TRS) from said transponder (20). Furthermore, it comprises a receiving module (14), which is connected to the antenna connection (13a, 13b) and arranged for processing an input voltage (VI) from said antenna (11) representing said radio signal (TRS). To provide satisfactory operation of the receiving module (14) and to compensate a bad matching of the antenna circuit to the electronic circuit (12, 12?) and/or bad environmental conditions where the reader device (10, 10?) is operated, the electronic circuit furthermore comprises a control module (15, 15?).

Abstract: An electronic circuit (12, 12?) for a reader device (10, 10?) for contactless communication with a transponder (20) is disclosed. The electronic circuit (12, 12?) comprises a connection (13a, 13b) to an antenna (11) of said reader device (10, 10?), which antenna (11) is designed for receiving a radio signal (TRS) from said transponder (20). Furthermore, it comprises a receiving module (14), which is connected to the antenna connection (13a, 13b) and arranged for processing an input voltage (VI) from said antenna (11) representing said radio signal (TRS). To provide satisfactory operation of the receiving module (14) and to compensate a bad matching of the antenna circuit to the electronic circuit (12, 12?) and/or bad environmental conditions where the reader device (10, 10?) is operated, the electronic circuit furthermore comprises a control module (15, 15?).

Abstract: An injection device is described for the blocking of peripheral nerves, e.g., for plexus anaesthesia. This injection device has an injection needle of metal which is provided at one end with a needle tip and at the opposite end with a base part for the connection of a syringe. In order in this injection device to largely eliminate the danger of damage to nerve fibers or injury to blood vessels by the injection needle and to permit an additional aid by the positive location of the plexus, the needle tip is formed by a ground surface inclined at an angle of 40.degree. to 60.degree., preferably of 45.degree. to 50.degree., to the cannula axis.