Analog Circuits With High-Gain Topologies Using a-GIZO TFTs on Glass

Author

Ganga Bahubalindruni, Pydi ; Silva, Bruno ; Grade Tavares, Vitor ; Barquinha, Pedro ; Cardoso, Nuno ; Guedes de Oliveira, Pedro ; Martins, Rodrigo ; Fortunato, Elvira

Author_Institution

Fac. of Eng., Univ. of Porto, Porto, Portugal

Volume

11

Issue

6

fYear

2015

fDate

Jun-15

Firstpage

547

Lastpage

553

Abstract

This paper presents analog building blocks that find potential applications in display panels. A buffer (source-follower), subtractor, adder, and 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 0.26 mW, and the amplifier presents a gain of 34 dB and a power consumption of 0.576 mW, with a load of 10 M Ω//16 pF. To the authors´ knowledge, this is the highest gain reported so far for a single-stage amplifier with a-GIZO TFT technology.

Keywords

adders; amplifiers; display instrumentation; gallium compounds; indium compounds; thin film transistors; GaInZnO; TFT technology; adder-subtractor circuit; analog circuit; capacitance 16 pF; display panel; gain 34 dB; glass; high-gain amplifier; high-gain topology; n-type enhancement amorphous gallium-indium-zinc-oxide thin-film transistors; neural model; power 0.26 mW; power 0.576 mW; resistance 10 Mohm; single-stage amplifier; source-follower; Adders; Frequency measurement; Gain; Integrated circuit modeling; Layout; Thin film transistors; Analog circuits; a-GIZO TFT; neural modeling;

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2014.2378058

Filename

6974998