Digital to analog converter

U.S. Patent Number: 5394146

Abstract: A D-A converter in which a phase deviation in load current is inhibited and a digital to analog conversion accuracy is enhanced. A data dividing block (7) is provided to switch a path depending upon a value of the most significant bit of an N bit digital signal (DATA) so as to conduct the D-A converting and the V-I converting based upon an (N-1)bit digital signal (DATA(N-1)) in either one of a first analog current output path consisting of a D-A converting block (11) and a V-I converting unit (210) and a second analog current output path consisting of a D-A converting block (12) and a V-I converting unit (220). Thus, since a large range of load current can be obtained and a phase deviation in the load current can be inhibited, a D-A conversion accuracy is enhanced.

Inventors: Arimoto; Masao (Itami, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP)

Application Number: 08/069,109

Issued: 1995-02-28

Expired: 2007-02-28

Classes: 341/118 ; 341/144

Field of search: 341/118,144,138

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