Digital-to-analog converter, display panel driver having the...

Details Digital-to-analog converter, display panel driver having the... Digital-to-analog converter, display panel driver having the...

2008-01-09

2009-08-11

Williams, Howard (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S144000, C345S692000

Reexamination Certificate

active

07573411

ABSTRACT:
A digital-to-analog converter outputting an analog data voltage corresponding to n-bit data, includes a chopping amplification unit adapted to receive an upper bit voltage corresponding to upper x bits of the n-bit data and a lower bit voltage corresponding to lower y bits of the n-bit data and to output the analog data voltage. The chopping amplification unit may include a sample and hold capacitor adapted to be charged with the upper bit voltage in a non-inverting mode, and a chopping amplifier adapted to supply the upper bit voltage to the sample and hold capacitor in the non-inverting mode and adapted to output a voltage corresponding to the sum of the upper bit voltage and the lower bit voltage as the analog data voltage in an inverting mode.

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