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Download PDF by Hagen Marien: Analog Organic Electronics: Building Blocks for Organic

By Hagen Marien

ISBN-10: 1461434203

ISBN-13: 9781461434207

ISBN-10: 1461434211

ISBN-13: 9781461434214

This ebook offers perception into natural electronics expertise and in analog circuit concepts that may be used to extend the functionality of either analog and electronic natural circuits. It explores the area of natural electronics know-how for analog circuit purposes, particularly shrewdpermanent sensor structures. It makes a speciality of the entire development blocks within the facts course of an natural sensor approach among the sensor and the electronic processing block. Sensors, amplifiers, analog-to-digital converters and DC-DC converters are mentioned intimately. insurance comprises circuit strategies, circuit implementation, layout judgements and size result of the development blocks described.

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Additional resources for Analog Organic Electronics: Building Blocks for Organic Smart Sensor Systems on Foil

Example text

Halving both the width and the spacing increases the resistance per area with a factor 4 yet this also increases the risk of hard failures. 2 Pentacene Resistor A resistive component can also be constructed with the pentacene layer. The layout of such a pentacene resistor is shown in Fig. 23b. The resistance of a pentacene thin-film resistor is unpredictable as the conductivity of pentacene depends on the electric field that is experienced, like in a pentacene thin-film transistor. The absence of a gate below the pentacene layer presumably results in a zero electric field in the pentacene and consequently is the resistance dependent on the position of the threshold voltage value and a large variation of the resistance, especially in between wafers and tape-outs is expected.

Moreover, since the backgate contact is fully disconnected from the transistor channel, no attention must be spent to leakage currents or to diodes that have to be kept reversely biased, like with the bulk contact in Si CMOS. Furthermore, the nice linearity of the influence of the backgate on the VT for both positive and negative VSBG makes the backgate in OTFTs a very useful contact for the design of both digital and analog circuits. 3 Features of the 4-contact OTFT The presence of the backgate in the 4-contact transistor enables to change the threshold voltage of the transistor.

1 Mobility The carrier mobility of the transistor is heavily determined by the physical properties of the pentacene layer. The uniformity of the pentacene layer on the wafer must therefore be optimized. Typically, depending on the deposition process and the deposition tool, there is a certain variability on the mobility. There is not much information available on the spread of the mobility. According to Gelinck et al. 04 cm2 /Vs. However, according to Myny et al. 15 cm2 /Vs. Information on the standard deviation is not given there but it is assumed reasonable that the relative deviation given by σμ /m μ has not increased during those 5 years of improvement.

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Analog Organic Electronics: Building Blocks for Organic Smart Sensor Systems on Foil by Hagen Marien


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