Patent ID: 7576674
Filing Date: 2009-08-18
Classification: G09G,H03M

Abstract:
1. A digital-to-analog converter circuit, comprising: a reference voltage generation circuit that generates and outputs a plurality of reference voltages; a decoder circuit that receives the reference voltages output from the reference voltage generation circuit, selects from among the reference voltages first to nth (where n is an integer greater than or equal to two) reference voltages inclusive of reference voltages that may be identical, based on an input digital signal, and outputs the selected first to nth reference voltages from first to nth output terminals thereof, respectively; an amplifying circuit that receives the first to nth reference voltages output from the decoder and outputs a voltage obtained by weighted summation of the selected first to nth reference voltages; and an amplification factor control unit that controls a voltage amplification factor of said amplifying circuit, wherein said amplifying circuit outputs the voltage defined by a value obtained by weighted summation of the selected first to nth reference voltages and the voltage amplification factor controlled by said amplification factor control unit.