Manchester-encoded data transmission circuit integrated by metal-oxide TFTs suitable for 13.56 MHz radio-frequency identification tag application

Abstract

This study proposes a Manchester-encoded data transmission circuit suitable for 13.56 MHz radio-frequency identification (ID) tags integrated by indium-zinc-oxide thin-film transistors (TFTs). All the modules in the circuit are only constructed by two types of logic units: NOT gate and NOR gate. The 16 bit ID data are stored in the read-only-memory circuits realised by a fixed TFTs array. The 16 bit ID data are encoded by Manchester module as the output of the Manchester-encoded data transmission circuit with a bit rate of 103 kbps. The chip area is 6.5 mm 2 with the total number of gates as 76 and the sum of the transistors as 300. Moreover, the power consumption is 3.8 mW at VDD = 5 V.