Integrated circuit D/A converter
AssigneeNEC Corporation
InventorMasanori Izumikawa
Life of this patent
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Abstract
A D/A converter implemented by an integrated circuit has a first section for conversion of higher-order N1 bits of an input digital signal to output a first current signal I.sub.1, a second section for conversion of lower-order N2 bits of the input digital signal to output a second current signal I.sub.2, a dividing section for dividing the second current signal to output a third current signal I.sub.2 .times.1/2.sup.N2, and an adding section for adding the first and third current signal. The D/A converter can be implemented by a reduced number of MOSFETs and has a reduced occupied area.
Claims9
A digital-to-analog converter (D/A converter) for converting an input digital signal into an analog signal, said D/A converter comprising a first converter section having a first configuration of components for converting a higher-order bits of the input digital signal into a first analog signal, a second converter section having a second configuration of components for converting a lower-order bits of the input digital signal other than the higher-order bits into a second analog signal, a weighting section for weighting the second analog signal relative to the first analog signal to output a third analog signal, an adding section for adding the first analog signal and third analog signal, and a compensating section corresponding to said first configuration of components, for compensating the output of said first converter section affecting the weighting in the weighting section.
Dependencies are inferred from the claim text.