Patent ID: 7193431

Claim:
A method for compensating for semiconductor device resistance, comprising the step of: (a) realizing a resistance equal to a desired resistance by one of combinations of a plurality of semiconductor devices, wherein the plurality of semiconductor devices comprise a combination of a plurality of pairs of first and second semiconductor devices of differential channel types, said step (a) including the step of (b) sequentially selecting two or more of the semiconductor devices to be combined, and thereby sequentially changing a resistance realized by the selected two or more of the semiconductor devices to be combined; (c) realizing the resistance equal to the desired resistance by one of combinations of a plurality of third semiconductor devices for comparison corresponding to and having the same channel type as the first semiconductor devices; (d) determining one of combinations of a plurality of fourth semiconductor devices for comparison having the same channel type as the first semiconductor devices based on information on the one of the combinations of the third semiconductor devices for comparison obtained in said step (c); (e) realizing a resistance equal to a resistance realized by the determined one of the combinations of the fourth semiconductor devices for comparison by one of combinations of a plurality of fifth semiconductor devices for comparison corresponding to and having the same channel type as the second semiconductor devices; (f) determining one of combinations of the first semiconductor devices based on information on the one of the combinations of the fourth semiconductor devices for comparison; and (g) determining one of combinations of the second semiconductor devices based on information on the one of the combinations of the fifth semiconductor devices for comparison.