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Design of an auto-zeroed, differential, organic thin-film field-effect transistor amplifier for sensor applications

Show simple item record Binkley, David M. Verma, Nikhil Crawford, Robert L. Brandon, Erik Jackson, Thomas N. 2006-11-28T19:18:14Z 2006-11-28T19:18:14Z 2004-08-03
dc.identifier.citation SPIE 49th International Symposium on Optical Science and Technology Annual Meeting, Denver, Colorado, August 2-6, 2004. en
dc.identifier.clearanceno 04-2334
dc.description.abstract Organic strain gauge and other sensors require high-gain, precision dc amplification to process their low-level output signals. Ideally, amplifiers would be fabricated using organic thin-film field-effect transistors (OTFT's) adjacent to the sensors. However, OTFT amplifiers exhibit low gain and high input-referred dc offsets that must be effectively managed. This paper presents a four-stage, cascaded differential OTFT amplifier utilizing switched capacitor auto-zeroing. Each stage provides a nominal voltage gain of four through a differential pair driving low-impedance active loads, which provide common-mode output voltage control. p-type pentacence OTFT's are used for the amplifier devices and auto-zero switches. Simulations indicate the amplifier provides a nominal voltage gain of 280 V/V and effectively amplifies a 1-mV dc signal in the presence of 500-mV amplifier input-referred dc offset voltages. Future work could include the addition of digital gain calibration and offset correction of residual offsets associated with charge injection imbalance in the differential circuits. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 2680185 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004. en
dc.subject thin film transistors en
dc.subject Organic thin-film field-effect (OTFT) amplifiers en
dc.subject large-area electronics en
dc.subject organic sensors en
dc.subject dc offset cancellation en
dc.subject auto-zero circuits en
dc.subject differential amplifiers en
dc.subject analog circuits en
dc.subject switched-capacitor circuits en
dc.title Design of an auto-zeroed, differential, organic thin-film field-effect transistor amplifier for sensor applications en
dc.type Preprint en

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