2011
DOI: 10.1109/led.2010.2093505
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A Novel Level Shifter Employing IGZO TFT

Abstract: A new level shifter employing indium-galliumzinc-oxide thin-film transistor (IGZO TFT) for a display panel was proposed and successfully fabricated. Two clock signals with 180 • out of phase and a discharging TFT were employed to obtain a full-swing output. The IGZO level shifter has successfully exhibited a wide swing output from V DD to V SS without any additional power sources and input signals. The power consumption is 0.30 mW at a clock frequency of 12.5 kHz. The proposed level shifter with a depletion-mo… Show more

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Cited by 20 publications
(7 citation statements)
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“…It accepts dual 5 V inputs and generates a single 20 V output signal. TTL-level input compatibility is a noticeable advantage over the previous report [8]. This circuit employs two MOS capacitors marked as MCU and MCL.…”
Section: / Kc Park Invited Papermentioning
confidence: 99%
“…It accepts dual 5 V inputs and generates a single 20 V output signal. TTL-level input compatibility is a noticeable advantage over the previous report [8]. This circuit employs two MOS capacitors marked as MCU and MCL.…”
Section: / Kc Park Invited Papermentioning
confidence: 99%
“…Oxide thin-film transistors (TFTs) have been widely examined and developed as a next-generation backplane technology for amorphous silicon and low temperature polycrystalline silicon processes due to low-cost fabrication, high mobility, and desired uniformity for large-sized highresolution active matrix liquid crystal displays and active Manuscript matrix organic light-emitting diode displays [1], [2]. In particular, the high mobility of an oxide TFT backplane facilitates the integration of some driving circuitries, such as level shifters and gate driver circuits on glass, for low-cost implementation [3]- [5].…”
Section: Introductionmentioning
confidence: 99%
“…Due to the possible negative threshold voltage (V T ) of the oxide TFTs, it is not desirable to utilize conventional circuit scheme when we integrate the driving circuitry on a display panel. Accordingly several new circuit structures have been devised based on the depletion characteristics of the metal-oxide TFTs [6,7,8,9]. In this letter, we report a new level shifter circuit that is compatible with the 5 V TTL(transistor-transistor logic)-level input and depletion-mode oxide TFTs.…”
Section: Introductionmentioning
confidence: 99%