Details

Autor(en) / Beteiligte

• Elsaegh, Samar
• Veit, Clemens
• Zschieschang, Ute
• Amayreh, Mohammad
• Letzkus, Florian
• Sailer, Holger
• Jurisch, Michael
• Burghartz, Joachim N.
• Wurfel, Uli
• Klauk, Hagen
• Zappe, Hans
• Manoli, Yiannos

Titel

Low-Power Organic Light Sensor Array Based on Active-Matrix Common-Gate Transimpedance Amplifier on Foil for Imaging Applications

Ist Teil von

• IEEE journal of solid-state circuits, 2020-09, Vol.55 (9), p.2553-2566

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2020

Quelle

IEEE

Beschreibungen/Notizen

• This article presents a 57.6-<inline-formula> <tex-math notation="LaTeX">\mu \text{W} </tex-math></inline-formula> mechanically flexible active-matrix imaging system based on a <inline-formula> <tex-math notation="LaTeX">4\times 5 </tex-math></inline-formula> array of light sensors, each composed of a photodetector (PD) using a light-sensitive organic polymer and a transimpedance amplifier (TIA) based on organic thin-film transistors and integrated thin-film carbon resistors. The PDs and the electronics are fabricated on separate plastic films and integrated into a system. Two different topologies for the TIA are designed, implemented, and characterized. The first topology is a self-biased TIA based on a gain-boosted operational amplifier (op-amp), providing an open-loop dc gain of 41.3 dB. This op-amp-based TIA, with a feedback resistor, provides stable current-to-voltage conversion (0-100 <inline-formula> <tex-math notation="LaTeX">\mu \text{A} </tex-math></inline-formula> and 2.0-3.7 V) at frequencies up to 300 Hz. The second topology is a low-power gain-boosted common-gate (GB CG) TIA that performs current-to-voltage conversion with a nonlinearity as small as ±0.3% within a bandwidth of 1 kHz. The output voltages of the light sensors are read and converted into a <inline-formula> <tex-math notation="LaTeX">4\times 5 </tex-math></inline-formula> pixel gray-scale image displayed on a computer monitor to visualize the functionality of the system.