Organic dual DC-DC upconverter on foil for improved circuit reliability

A report is presented on the design and measurement of one of the first dual DC-DC upconverters implemented in an organic thin-film technology on foil providing output voltages beyond the upper and lower power supply voltages. The converter generates bias voltages around + 50 and ―40 V from a 20 V power supply. The upconverted voltage range is sufficient to bias backgates of transistors in dual-gate thin-film transistor technologies, which improves the reliability of analogue as well as digital thin-film circuits.