Patent ID: 7023417
Filing Date: 2006-04-04
Classification: G09G

Abstract:
1. A column driver circuit, comprising: a voltage divider for generating a plurality of reference voltage levels; a first data decoder coupled to said voltage divider for receiving a first subset of said plurality of reference voltage levels; a second data decoder coupled to said voltage divider for receiving a second subset of said plurality of reference voltage levels; a plurality of digital decoders coupled to said first and second data decoders, operable to select one of said plurality of reference voltage levels for each of said first and second data decoders each to provide at least one analog output; a plurality of amplifiers, each having a first stage that receives said analog output from one of said plurality of data decoders, and a second stage that receives as input an output of said first stage and provides a signal; and a plurality of switches, each coupled between said first stage and said second stage of each of said plurality of two stage amplifiers, wherein one of said switches couples one of said output from one of said first stage of one of said amplifiers to one of said second stage of one of said amplifiers.