Design of an organic Differential Amplifier with Gain Enhancement Positive Feedback

Conference: ANALOG 2013 - Entwicklung von Analogschaltungen mit CAE-Methoden - Vorträge der 13. ITG/GMM-Fachtagung
03/04/2013 - 03/06/2013 at Aachen, Deutschland

Proceedings: ANALOG 2013 - Entwicklung von Analogschaltungen mit CAE-Methoden

Pages: 4Language: englishTyp: PDF

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Ganesan, Ramkumar; Glesner, Manfred (Institute of Microelectronic Systems, Technische Universitaet Darmstadt, Merckstr. 25, 64283 Darmstadt, Germany)
Krumm, Jürgen; Ludwig, Klaus (PolyIC GmbH & Co. KG, Tucherstrasse 2, 90763 Fuerth, Germany)

This paper presents an organic differential amplifier design using gain enhancement feedback to achieve higher gain and more robust to Vt variation. The differential amplifier is designed using P-type organic thin-film transistors (OTFT) and a biased load with positive feedback providing the bias. The performance of the proposed circuit is compared with the ones having diode and cut-off load configuration. The proposed differential amplifier has a gain of 12 (V/V) approximately and is observed to be more robust to Vt variation. Thus the usage of positive feedback biased load combines the advantages of diode load and cut-off load. The circuits were operated with a VDD of -20 V.