| 摘要 |
While a current of a constant current source 503 is equally divided to a plurality of current paths so as to produce a unit current, switches which are series-connected to the respective current paths are controlled by a switch circuit 504 in response to a digital input signal. As a result, since both output currents 505 and 506 whose unit currents are variable can be obtained, a total number of circuit components is reduced, so that not only an occupied area may be reduced, but also resolution in the vicinity of a center may be improved.
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