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Source-Degenerated Schmitt-Trigger-Based High-Performance Digital Logic 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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A source-degenerated Schmitt-trigger logic is proposed. Based on this architecture, basic logic-gate architectures, ring oscillators, and edge-sensitive D-type flip-flops were fabricated using low-voltage p-channel organic thin-film transistors and integrated thin-film carbon resistors on flexible polymeric substrates. Mathematical analysis of this logic architecture indicates improved stability against 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 source-degenerated Schmitt-trigger 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-flop architectures.