Patent ID: 8648617

Claim:
A semiconductor device, comprising: an internal circuit that serves to receive or output a signal current; a current mirror unit outputting a copied current corresponding to the signal current; and a test pad from which the copied current is taken out, wherein the current mirror unit comprises: a first current mirror circuit including a first first-conductivity type MOS transistor and a second first-conductivity type MOS transistor, a drain of the first first-conductivity type MOS transistor receiving the signal current outputted from the internal circuit, the second first-conductivity type MOS transistor being connected to the first first-conductivity type MOS transistor in a current mirror configuration; and a second current mirror circuit including a first second-conductivity type MOS transistor and a second second-conductivity MOS transistor, the first second-conductivity type MOS transistor receiving a drain current of the second first-conductivity type MOS transistor, the second second-conductivity type MOS transistor being connected to the first second-conductivity type MOS transistor in a current mirror configuration, and wherein a drain current of the second second-conductivity type MOS transistor is taken out from the test pad as the copied current, and wherein the first conductivity type is an n type and the second conductivity type is a p type.