49.35 MHz GBW and 33.43 MHz GBW amplifiers in flexible a‐IGZO TFT technology. Issue 15 (1st July 2020)

• Record Type: Journal Article
• Authors: Meister, T.; Ishida, K.; Sou, A.; Carta, C.; Ellinger, F.
• Is Part Of: Electronics letters. Volume 56:Issue 15(2020)
• Page Start: 782
• Page End: 785
• Publication Date: 2020-07-01
• Subjects: low‐power electronics -- indium compounds -- operational amplifiers -- thin film transistors -- amorphous semiconductors -- gallium compounds -- zinc compounds -- VHF amplifiers; a‐IGZO TFT technology -- thin‐film transistor technology -- 4‐stage common source amplifier -- CH amplifier -- pre‐amplifier -- high gain‐bandwidth product -- GBW product -- a‐IGZO TFT amplifiers -- commercial flexible amorphous Indium Gallium Zinc Oxide TFT technology -- voltage 2.5 V to 10.0 V -- frequency 49.35 MHz -- frequency 5.3 MHz -- power 0.2 mW -- frequency 33.43 MHz -- power 14.2 mW -- gain 19.4 dB -- gain 28.9 dB -- bandwidth 1.2 MHz -- voltage 8 V; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2020.0813
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : The authors present the implementation of two amplifiers in a commercial flexible amorphous Indium Gallium Zinc Oxide (a‐IGZO) thin‐film transistor (TFT) technology: a Cherry Hooper (CH) amplifier and a 4‐stage common source amplifier. The CH amplifier is designed as a pre‐amplifier for wireless receivers. It is optimised for a high gain‐bandwidth product (GBW). From a supply voltage of V DD = 8 V it provides 19.4 dB gain and has a − 3 dB ‐bandwidth of 5.3 MHz, while consuming 0.2 mW. It has a GBW of 49.35 MHz, which is more than a factor two better than previously reported a‐IGZO TFT amplifiers. The 4‐stage common source amplifier is designed as output buffer, has a very wide range of operating conditions and strong robustness against manufacturing tolerances. From a supply voltage of V DD = 8 V it provides 28.9 dB gain, has a − 3 dB ‐bandwidth of 1.2 MHz, and a GBW product of 33.43 MHz, while consuming 14.2 mW. Both circuits can operate from a supply voltage between 2.5 and 10 V.