Importance

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Abstract

A multiple function type D/A converter utilizing a ladder type resistance circuit, and capable of other mathematical functions in addition to the D/A conversion, having a series resistance circuit consisting of N number of resistors R2.sub.1 .about.R2.sub.n each having a resistance value R connected in series between an output terminal V.sub.o and one side of a terminal resistor R.sub.o which has a resistance value 2R and is connected on its other side to ground, such series circuit including a resistor connecting point between each adjacent pair of resistors R.sub.0, R2.sub.1 .about.R2.sub.N, and branching in parallel therefrom N+1 number of groups of parallel resistors 01.about.0n, 11.about.1n, . . . N1.about.Nn, each containing n resistors where n is an integer greater than 1, the n resistors of each such group being all connected on one side to the same resistor connecting point with different groups thereof connected to different connecting points along such series circuit, the n resistors of each such group being individually switchable on the other side thereof alternately between ground and a reference voltage V.sub.s by means of corresponding groups of switching circuits S.sub.01 .about.S.sub.0n . . . S.sub.N1 .about.S.sub.Nn under the control of applied digital signals.

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First Claim