Abstract
A 640-channel 6-bit LCD column driver with a
cross-self-bias push–pull buffer is presented. To design a
column driver for thin-film transistor liquid-crystal displays
(TFT-LCDs), both low power consumption and chip area are key
problems that must be solved. Therefore, the proposed
cross-self-bias buffer amplifier effectively reduces the circuit
area and power consumption overheads of conventional class-AB
biasing techniques. The 640-channel 6-bit column driver is
implemented using 0.18-μm high-voltage CMOS
technology. The proposed column driver is then used in an SXGA
LCD panel to perform the experimental characterization. The
measured performance of column driver exhibits maximum settling
times of 1.4 μs and 1.2 μs for
rising and falling edges, respectively, under one-dot inversion.
The quiescent current consumption of the proposed rail-to-rail
buffer is about 4 μA.
© 2011 IEEE
PDF Article
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