This paper presents analog building blocks that find potential applications in display panels. A buffer (sourcefollower), subtractor, adder and a high-gain amplifier, employing only n-type enhancement amorphous Gallium-Indium- Zinc-Oxide thin-film transistors (a-GIZO TFTs), were designed, simulated, fabricated and characterized. Circuit simulations were carried out using a neural model developed in-house from the measured characteristics of the transistors. The adder-subtractor circuit presents a power consumption of 0.26mW, and the amplifier presents a gain of 34 dB and a power consumption of 0.576mW, with a load of 10M //16 pF. To the authors knowledge, this is the highest gain amplifier with a-GIZO TFT technology till date. Simulation results are in agreement with the measured circuit response.
- Analog circuits
- a-GIZO TFT
- neural modeling
Fortunato, E. M. C., Barquinha, P. M. C., Martins, R. F. D. P., Bahubalindruni, P. G., Silva, B., Tavares, V. G., Cardoso, N., & De Oliveira, P. G. (2015). Analog Circuits With High-Gain Topologies Using a-GIZO TFTs on Glass. Journal Of Display Technology, 11(6), 547-553. https://doi.org/10.1109/JDT.2014.2378058