A Compact Low-Voltage D-type Flip Flop Using Oxide TFTs and Its Application in Sequential Circuits

This brief presents a low-voltage D-type flip flop (D-FF) and its application in the sequential circuits, namely shift register (SR) and counter. These circuits were fabricated on a 30 \mu \text{m} thick polymide substrate using single-gate indium-gallium-zinc-oxide (IGZO) thin-film transistors (TF...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2023-03, Vol.70 (3), p.1184-1188
Main Authors: Tiwari, Bhawna, Bahubalindruni, Pydi Ganga
Format: Article
Language:English
Subjects:
Circuit design
Clocks
driving circuits
Electric potential
Flexible electronics
Flip-flops
Gallium
Indium gallium zinc oxide
Inverters
oxide TFTs
Semiconductor devices
Sequential circuits
Shift registers
smart sensing systems
Substrates
Thin film transistors
Transistors
Voltage
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Summary:This brief presents a low-voltage D-type flip flop (D-FF) and its application in the sequential circuits, namely shift register (SR) and counter. These circuits were fabricated on a 30 \mu \text{m} thick polymide substrate using single-gate indium-gallium-zinc-oxide (IGZO) thin-film transistors (TFTs). The proposed D-FF is designed using only 18 n-type transistors. This circuit has shown almost 100% improvement in frequency of operation compared to state-of-the-artwork from measurements at a low power supply voltage of 4V. In addition, the resulting 6-bit SR and 6-bit counter show expected functionality with the proposed D-FF. These circuits would find potential applications in display drivers and flexible smart sensing systems.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2022.3220518