Patent ID: 8174475
Filing Date: 2012-05-08
Classification: G09G

Abstract:
1. A D/A conversion circuit comprising: a first D/A converter that selects a voltage corresponding to input data from a plurality of input voltages and outputs the selected voltage as a first voltage; and a second D/A converter that selects a voltage corresponding to the input data from a plurality of input voltages and outputs the selected voltage as a second voltage, each of the first D/A converter and the second D/A converter including multiple-stage selector blocks, an output from a selector included in a preceding-stage selector block among the multiple-stage selector blocks being input to a selector included in a subsequent-stage selector block among the multiple-stage selector blocks; a first-stage selector block included in the multiple-stage selector blocks of the first D/A converter including a plurality of two-input selectors; a first-stage selector block included in the multiple-stage selector blocks of the second D/A converter including a plurality of three-input selectors; an ith two-input selector (i is an integer equal to or larger than zero) among the plurality of two-input selectors of the first D/A converter selecting a (4i+1)th input voltage or a (4i+3)th input voltage among the plurality of input voltages based on the input data, and outputting the selected input voltage to the selector of the selector block in the subsequent stage; and an ith three-input selector among the plurality of three-input selectors of the second D/A converter selecting a 4ith input voltage, a (4i+2)th input voltage, or a (4i+4)th input voltage among the plurality of input voltages based on the input data, and outputting the selected input voltage to the selector of the selector block in the subsequent stage.