5 documents found, page 1 of 1
Rail-to-Rail Timing Signals Generation Using InGaZnO TFTs for Flexible X-Ray De...
Bahubalindruni, Pydi Ganga; Barquinha, Pedro; Tiwari, Bhawna; Pereira, Maria; Santa, Ana; Martins, Jorge; Rovisco, Ana; Tavares, Vitor; Martins, RodrigoECR/2017/000931 POCI-01-0145-FEDER-007688; This paper reports on-chip rail-to-rail timing signals generation thin-film circuits for the first time. These circuits, based on a-IGZO thin-film transistors (TFTs) with a simple staggered bottom gate structure, allow row and column selection of a sensor matrix embedded in a flexible radiation sensing system. They include on-chip clock generator (ring oscillator), col...
Low-Voltage High-Speed Ring Oscillator with a-InGaZnO TFTs
Tiwari, Bhawna; Bahubalindruni, Pydi Ganga; Santos, Ângelo; Santa, Ana; Figueiredo, Cátia; Pereira, Maria; Martins, Rodrigo; Fortunato, ElviraECR/2017/000931 POCI-01-0145-FEDER-007688 PTDC/NAN-MAT/30812/2017; This paper presents a high-speed ring oscillator (RO) with amorphous Indium-Gallium-Zinc-Oxide Thin-film transistors (a-IGZO TFTs). The proposed RO reduces the delay of a single stage inverter using intermediate signals generated within the RO, hence, improving the speed. To validate the proposed idea, two conventional ROs (with diode-load load ...
A Voltage Controlled Oscillator Using IGZO Thin-Film Transistors
Keragodu, Tejaswini; Tiwari, Bhawna; Nishtha; Bahubalindruni, Pydi; Goes, Joao; Barquinha, Pedroearly career research grant with project ref. ECR/2017/000931. National Funds through FCT - Portuguese Foundation for Science and Technology POCI-01-0145-FEDER-007688; This paper presents a voltage controlled oscillator (VCO) using amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs). This circuit consists of a high-gain OpAmp, a comparator and a relaxation oscillator. The implemented relax...
A Low-Power Rail-to-Rail Row/Column Selector Operating at 2V Using a-IGZO TFTs ...
Santos, Ângelo; Tiwari, Bhawna; Martins, Jorge; Santa, Ana; Chapagai, Kamal; Bahubalindruni, Pydi; Barquinha, PedroECR/2017/000931 POCI-01-0145-FEDER-007688 SFRH/BD/122286/2016 ORABAC/17852; This paper presents design and implementation of 8-bit shift register with low-voltage amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs) for row/column selection of pixel matrix in flexible displays. This circuit is capable of ensuring complete rail-to-rail operation by employing novel NAND gates that were develo...
A High Speed Programmable Ring Oscillator Using InGaZnO Thin-Film Transistors
Tiwari, Bhawna; Martins, Jorge; Kalla, Shivam; Kaushik, Shashwat; Santa, Ana; Bahubalindruni, Pydi Ganga; Tavares, Vitor Grade; Barquinha, PedroECR/2017/000931. POCI-01-0145-FEDER-007688. SFRH/BD/122286/2016.; This paper presents a high speed digitally programmable Ring Oscillator (RO) using Indium-gallium-zinc oxide thin-film transistors (IGZO TFTs). Proposed circuit ensures high speed compared to the conventional ROs using negative skewed scheme, in which each inverter delay is reduced by pre-maturely switching on/off the transistors. In addition, by...