Digital-to-analog conversion circuit
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorKazuaki Kurooka
Life of this patent
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Abstract
A digital-to-analog conversion circuit includes first and second MOS transistors. The first MOS transistors have different sizes corresponding to bits in received digital data, and apply a weight to an input current by switching and outputting a weighted current. The second MOS transistors also have different sizes corresponding to the bits in the digital data, and apply a weight to a current input to the first MOS transistors that are turned ON by switching. The second MOS transistors apply the weight so that the sum of the currents output from the first MOS transistors has a non-linear characteristic.
Claims8
A digital-to-analog conversion circuit comprising:
- a plurality of first MOS transistors, each first MOS transistor having a different size corresponding to a respective bit in received digital data, each first MOS transistor applying a weight to an input current by switching and outputting a weighted current;
- and
- a plurality of second MOS transistors, each second MOS transistor having a different size corresponding to the respective bits in the received digital data, applying a weight to a current to be input into said first MOS transistors that are ON by switching, wherein said second MOS transistors apply a weight to the current to be input to said first MOS transistors so a sum of currents output from said first MOS transistors has a non-linear characteristic relative to the received digital data.
Dependencies are inferred from the claim text.