Low-Power Design for Unipolar ITO-Stabilized ZnO TFT RFID Code Generator Using Differential Logic Decoder

This article proposes a low-power differential logic (DL) row/column decoder for radio frequency identification (RFID) code generators, which is used to optimize the power consumption of RFID at the circuit level. In addition, a pull-up control ring oscillator (PUC-RO) is also applied to further power optimization. For comparison, we fabricate three kinds of code generators with unipolar metal-oxide thin-film transistors (MO TFTs) using an indium tin oxide (ITO)-stabilized ZnO active channel layer. The power consumption of the code generator with a DL decoder is reduced by more than 20% under the same supply voltage compared to the conventional pseudo-CMOS design. The power consumption of the code generator with a DL decoder and PUC-RO is reduced by more than 40%. These results reveal a new perspective for power optimization of RFID tags based on TFTs technology.