Patent ID: 6373419
Filing Date: 2002-04-16
Classification: G09G,H03M

Abstract:
A digital-to-analogue converter for converting N-bit digital signals to analogue signals by generating mutually different standard voltages and providing 2N output voltages based on the standard voltages according to the digital signals,said digital-to-analogue converter comprising: standard voltage generating means for generating 2(Nâˆ’1)+1 mutually different standard voltages, selector means for: storing standard voltage pairs in advance so that none of the standard voltage pairs produces an identical mean value and also so that each of the digital signals corresponds to one of the standard voltage pairs; upon reception of one of the digital signals, selecting one of the standard voltage pairs corresponding to the received digital signal; and providing the standard voltages constituting the selected standard voltage pair for output; and output means for receiving the output standard voltages of the selector means, and providing as the output voltage a mean value of the received standard voltages, wherein the selector means includes switch pairs, each including two switches, for selecting one of two input signals according to data expressed in each bit of the N-bit digital signals, and wherein a1=1, a2=2, an=anâˆ’1+2(nâˆ’3(3n is the number of switch pairs of the selector means for the n-th lowest digit bit.