Chin. Phys. Lett.  2015, Vol. 32 Issue (4): 047302    DOI: 10.1088/0256-307X/32/4/047302
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Frequency Performance of Ring Oscillators Based on a-IGZO Thin-Film Transistors
YU Guang1,2, WU Chen-Fei1,2, LU Hai1,2**, REN Fang-Fang1,2, ZHANG Rong1,2, ZHENG You-Dou1,2, HUANG Xiao-Ming3
1Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, and School of Electronic Science and Engineering, Nanjing University, Nanjing 210093
2Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093
3Peter Grünberg Research Center, Nanjing University of Posts and Telecommunications, Nanjing 210003
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YU Guang, WU Chen-Fei, LU Hai et al  2015 Chin. Phys. Lett. 32 047302
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Abstract Ring oscillators based on indium gallium zinc oxide thin film transistors are fabricated on glass substrates. The oscillator circuit consists of seven delay stages and an output buffer inverter. The element inverter exhibits a voltage gain higher than ?6 V/V and a wide output swing close to 85% of the full swing range. The dynamic performance of the ring oscillators is evaluated as a function of supply voltage and at different gate lengths. A maximum oscillation frequency of 0.88 MHz is obtained for a supply voltage of 50 V, corresponding to a propagation delay of less than 85 ns/stage.
Received: 11 November 2014      Published: 30 April 2015
PACS:  73.61.Jc (Amorphous semiconductors; glasses)  
  73.40.Qv (Metal-insulator-semiconductor structures (including semiconductor-to-insulator))  
  85.40.-e (Microelectronics: LSI, VLSI, ULSI; integrated circuit fabrication technology)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/4/047302       OR      https://cpl.iphy.ac.cn/Y2015/V32/I4/047302
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YU Guang
WU Chen-Fei
LU Hai
REN Fang-Fang
ZHANG Rong
ZHENG You-Dou
HUANG Xiao-Ming
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