Organic CMOS Line Drivers on Foil

Abstract

In this paper, the design of a low-voltage line driver in a complementary organic technology on foil is presented. The behavior and the variability of circuits are predicted by means of transistor modeling and statistical characterization. The compar- ison of measurements and simulations of simple digital blocks ver- ifies the effectiveness of the design approach. A transmission-gate based 32-stage line driver and a fully-static one are shown. It is also shown that, based on the statistical organic thin-film transistor (OTFT) characterization, the fully-static logic style is a more suit- able choice for implementing line drivers in this technology. The implemented fully-static line driver, which is comprised of 1216 transistors, has the highest transistor count reported for a comple- mentary organic circuit to date. It works at supply voltages from 10 V to as low as 3.3 V, reaching a 1 kHz clock frequency, and oc- cupying an area of 25  4.7 mm . The drivers are implemented in a technology compatible with that of flat-panel display backplanes and are tested with a QQVGA AMOLED display

Imperceptible magnetic sensor matrix system integrated with organic driver and amplifier circuits

“…In addition, the charge stored in the circuit does not dissipate completely, as is common in conventional bootstrap circuits (40); instead, it contributes to the next stage while requiring only half the power from F1 and F2 to charge the successive capacitor. Thus, the power dispersion could be notably lower than that of previously demonstrated organic shift registers (24)(25)(26)(27)(28)(29)(34)(35)(36)(37)(38). We estimated the power consumption in practice, as presented in table S1.…”

“…In other words, these energy sources set strict voltage and power supply constraints to the entire sensor system. Although shift registers composed of complementary OTFTs have been reported (24)(25)(26)(27)(28)(29), the operating voltage or power consumption of one of the transistor species is still high. On the other hand, some researchers have recently reported complementary OTFT circuits with low-voltage operation or low power consumption based on n-type OTFTs with high performance (31)(32)(33).…”

Shifting the Frontiers of Analog and Mixed-Signal Electronics

“…Complementary organic technologies (or hybrid technologies, with inorganic amorphous metal oxides), using evaporated or printed materials, face even more hard faults but can provide higher resilience to variability at circuit level, as all established complementary circuit options are available now to provide optimal resilience [10,11]. Moreover, discrete-time operation becomes available now, enabling AD and DA, and more generally designs in the asd and staircase quadrants of AMS [12,13].…”

Roadmap to Gigahertz Organic Transistors

“…Organic TFTs, fabricated using either conjugated polymers or small‐molecule semiconductors, are being developed as alternatives to the above‐mentioned, mostly, inorganic TFTs. An attractive feature of organic TFTs is that both p‐channel and n‐channel TFTs can be fabricated at relatively low process temperatures, usually at or near room temperature . However, despite more than three decades of intense research, the highest reported transit frequencies of organic TFTs are still well below 1 GHz.…”