Patent ID: 7453385
Filing Date: 2008-11-18
Classification: H03M

Abstract:
1. A D/A converter comprising: an (N−1)-stage reference resistor group including serially connecting a plurality of reference resistors, the (N−1)-stage reference resistor group extracting an (N−1) an N-stage reference resistor group including serially connecting a plurality of reference resistors, an N-stage reference resistor group extracting an N inter-stage op-amps applying the divided voltage outputted from the voltage taps of the (N−1)-stage reference resistor group, across both ends of the N-stage reference resistor group as the N a dynamic range expanding means for arranging the voltage taps in the (N−1)-stage reference resistor group so as to expand upward and downward, to expand an input dynamic range in the N-stage reference resistor group; and expansion resistors arranged respectively at both upper and lower ends of the N-stage reference resistor group in response to upward and downward expanded amounts of the dynamic range.