D-A converter

Details D-A converter D-A converter

1992-09-25

1994-07-05

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341118, H03M 166

Patent

active

053271343

ABSTRACT:
In order to improve linearlity of analog current outputs with respect to input digital codes in a D-A converter formed by a matrix array of unit current sources, respective current source cells forming the matrix are connected by analog ground wires (101 to 105 ) along respective rows. Analog ground wires (301, 302 ) connect left sides of the analog ground wires (102, 104) and right sides of the analog ground wires (101, 103, 105) to pads (41, 42 ) respectively, to ground the same. Thus, large-small relations of current distributions are reversed in respective rows, whereby influences by the current distributions are cancelled.

REFERENCES:
patent: 4910514 (1990-03-01), Irmer et al.
patent: 4935741 (1990-06-01), Reich
patent: 4967140 (1990-10-01), Groeneveld et al.
patent: 5036322 (1991-07-01), Barron et al.
patent: 5162800 (1992-11-01), Ogawara
patent: 5181034 (1993-01-01), Takakura et al.

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