Patent ID: 6169424
Filing Date: 2001-01-02
Classification: H03F,H03K

Abstract:
An amplifier comprising: an input CMOS inverter comprising an input pMOSFET and an input nMOSFET, wherein the gates of the input pMOSFET and the input nMOSFET are at an input voltage; a first pMOSFET coupled to the input CMOS inverter to provide an active load to the input nMOSFET; a second pMOSFET coupled to the first pMOSFET to form a pMOS current mirror; a reference CMOS inverter comprising a reference pMOSFET and a reference nMOSFET, wherein the gates of the reference pMOSFET and the reference nMOSFET are at a reference voltage, wherein the second pMOSFET is coupled to the input CMOS inverter to provide an active load to the reference nMOSFET; a first pMOSFET coupled to the input CMOS inverter to provide an active load to the input nMOSFET; a second pMOSFET coupled to the first pMOSFET to form a pMOS current mirror and coupled to the reference CMOS inverter to provide an active load to the reference nMOSFET; a source pMOSFET having a source connected to the sources of the first and second pMOSFETs, having a drain connected to the sources of the input and reference pMOSFETs, and having a gate connected to the gates of the first and second pMOSFETs; and a sink nMOSFET having a source connected to the sources of the first and second nMOSFETs, having a drain connected to the sources of the input and reference nMOSFETs, and having a gate connected to the gates of the first and second nMOSFETs.