Patent ID: 7446566
Filing Date: 2008-11-04
Classification: H03K

Abstract:
1. A level shifter circuit comprising: a first transistor having a first current electrode coupled to a first power supply voltage terminal, a control electrode coupled to an output terminal, and a second current electrode; a second transistor having a first current electrode coupled to the first power supply voltage terminal, a control electrode coupled to the second current electrode of the first transistor, and a second control electrode coupled to the control electrode of the first transistor; a third transistor having a first current electrode coupled to the second current electrode of the first transistor, a control electrode, and a second current electrode; a fourth transistor having a first current electrode coupled to the second current electrode of the second transistor, a control electrode coupled to the second current electrode of the third transistor, and a second current electrode coupled to the control electrode of the third transistor; a first inverter having an input terminal, and an output terminal coupled to the second current electrode of the third transistor; and a second inverter having an input terminal coupled to the output terminal of the first inverter, and an output terminal coupled to the second current electrode of the fourth transistor.