Patent ID: 7382029
Filing Date: 2008-06-03
Classification: H01L

Abstract:
1. A current mirror device for an integrated circuit, comprising: a reference current source; a first field effect transistor (FET) in series with the reference current source, the first FET of a first conductivity type formed on a first portion of a substrate having a first crystal lattice orientation; and a second FET of the first conductivity type formed on a second portion of the substrate having a second crystal lattice orientation, with a gate terminal of the first FET coupled to a gate terminal of the second FET, and the gate terminals of the first and second FETs coupled to the reference current source; wherein the carrier mobility of the first FET formed on the first portion of the substrate with the first crystal lattice orientation is different than the carrier mobility of the second FET formed on the second portion of the substrate having with the second crystal lattice orientation.