Patent ID: 7863927
Filing Date: 2011-01-04
Classification: H03K

Abstract:
1. A semiconductor device comprising: a pad for coupling an external resistor; a first first-type resistance adjuster whose resistance value is adjusted according to a first code signal; a second first-type resistance adjuster whose resistance value is adjusted according to the first code signal; a third first-type resistance adjuster whose resistance value is adjusted according to a first correction code signal; a first second-type resistance adjuster whose resistance value is adjusted according to a second code signal; a second second-type resistance adjuster whose resistance value is adjusted according to the second code signal; and a code generator for comparing potential of a first node determined by a resistance ratio between the external resistor and the first first-type resistance adjuster with a reference potential, adjusting the first code signal according to a comparison result, adjusting a first correction code based on the first code signal, comparing potential of a second node determined by combined resistance between the second first-type resistance adjuster and the third first-type resistance adjuster and combined resistance between the first second-type resistance adjuster and the second second-type resistance adjuster with reference potential, and adjusting a second code signal according to a comparison result, wherein