Patent ID: 7091712
Filing Date: 2006-08-15
Classification: G05F

Abstract:
1. A circuit having a first output terminal, comprising: a first current source having an input coupled to a power supply terminal, and an output; a second current source having an input coupled to the power supply terminal, and an output; a first transistor having a first current electrode and a control electrode coupled to the output of the first current source, and a second current electrode coupled to the first output terminal; a second transistor having a first current electrode coupled to the output of the second current source, a control electrode coupled to the control electrode of the first transistor, and a second current electrode; an impedance having a first terminal coupled to the second current electrode of the second transistor and a second terminal coupled to the first output terminal; and a third transistor having a first current electrode coupled to the power supply terminal, a control electrode coupled to the first current electrode of the second transistor, and a second current electrode coupled to the first output terminal, wherein the first output terminal is not connected to a negative rail.