Abstract: Transponders present in an interrogation zone can be identified by an interrogator by it sending an RF interrogation signal into the interrogation zone, the RF interrogation signal containing a code string prompting the transponders to generate partial addresses. As soon as one transponder “sees” that the generated partial address agrees with part of its own address, it responds by sending its full address which can then be read by the interrogator. Immediately after having received a full address the interrogator sends a code string characterizing the address of the transponder having responded before so that this transponder is thereby addressable. The signal sent by the interrogator to the transponder with this code string also contains an instruction which prompts the transponder to assume the condition in which it no longer responds to receiving its address or partial address.

Abstract: An assembly for generating a consecutive count includes an n-stage binary counter (24) incrementable by counting pulses in successive cycles and an EEPROM (10) in which an item of information representing the count achieved in each case is stored in the pauses between the cycles. The EEPROM (10) comprises n+1 memory cells. A control circuit (36) is provided causing the contents of the n−1 stages of the binary counter (24) assigned to the most-significant bits to be stored in the n−1 first memory cells of the EEPROM (10) and the contents of the nth or (n+1)th memory cell is changed in alternate cycles.

Abstract: An electronic system 8 is disclosed herein. The system includes circuitry 10 for processing a signal and a plurality of antennas 12a-12b. A plurality of switches 22a-22b are also included. Each of the switches 22a-22b is coupled between the processing circuitry 10 and a corresponding one of the antennas 12a-12b. Each of the switches 22a-22b includes first and second power MOSFETs where the source of the first MOSFET is coupled to the source of the second MOSFET. The system further includes circuitry 28 for selecting of one of the plurality of switches 22a-22b to be on.

Abstract: A master RF module (12), a slave RF module (20) without an internal oscillator, and additional circuitry (40) (52). A pick up coil (30) disposed perpendicular to the antenna (16) of the master RF module (12), is connected to the additional circuitry (40) (52). Transmission from the master RF module (12) is received by the pick up coil (30) and is filtered (42) (54), and amplified (44, 46) (64, 78) by the additional circuitry (40) (52). The amplified signal is used as an oscillator input (22) to the slave RF module (20) and is also converted into a square wave monoflop signal by square wave converter (48) (98) for enabling the transmitter control (24) of the slave RF module (20).

Abstract: An electronic system 8 is disclosed herein. The system includes circuitry 10 for processing a signal and a plurality of antennas 12a-12b. A plurality of switches 22a-22b are also included. Each of the switches 22a-22b is coupled between the processing circuitry 10 and a corresponding one of the antennas 12a-12b. Each of the switches 22a-22b includes first and second power MOSFETs where the source of the first MOSFET is coupled to the source of the second MOSFET. The system further includes circuitry 28 for selecting of one of the plurality of switches 22a-22b to be on.