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Resistive Schmitt-Trigger Logic and High-Performance Digital Cell Library for Flexible Organic Thin-Film Transistor Technologies
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  • Masoud Seifaei ,
  • Daniel schillinger ,
  • Pratiksha Malurpatna Prabhu ,
  • mohsen mohammadi kharkeshi ,
  • Ute Zschieschang ,
  • xavier cuignet ,
  • Hagen Klauk ,
  • Yiannos Manoli
Masoud Seifaei
University of Freiburg, University of Freiburg

Corresponding Author:[email protected]

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Daniel schillinger
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Pratiksha Malurpatna Prabhu
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mohsen mohammadi kharkeshi
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Ute Zschieschang
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xavier cuignet
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Hagen Klauk
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Yiannos Manoli
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Abstract

A resistive Schmitt-trigger (RST) logic is proposed. Based on this architecture, a digital cell library was designed, and basic logic-gate architectures, ring oscillators, edge-sensitive D-type flip-flops and a pad-driver cell were fabricated using low-voltage p-channel organic thin-film transistors (TFT) and integrated thin-film carbon resistors on flexible polymeric substrates. Theoretical analysis and experimental characterization of the RST logic architecture indicate improved stability against device-parameter mismatch and charge-carrier-mobility degradation. A small-signal gain of 83 dB and a noise margin of 92 % of half the supply voltage have been measured. Owing to the intrinsic positive-feedback loop of the RST logic, the design of the D-flip-flop enables a substantially smaller footprint and a considerably lower energy dissipation compared to previously reported unipolar organic-TFT-based D-flip-flops.