Patent ID: 6507245
Filing Date: 2003-01-14
Classification: H03F

Abstract:
An amplifier comprising:a push-up circuit comprising: a first differential pair; and a first driving circuit connected to the first differential pair in a cascade manner, the first driving circuit having a common source amplifying circuit formed of a MOS (metal-oxide-semiconductor); and a pull-down circuit comprising: a second differential pair; and a second driving circuit connected to the second differential pair in a cascade manner, the second driving circuit having a common source amplifying circuit formed of a MOS; wherein a portion of a normal operation voltage range of the push-up circuit overlaps a portion of a normal operation voltage range of the pull-down circuit, a remaining portion of the normal operation voltage range of the push-up circuit falls outside the normal operation voltage range of the pull-down circuit, a remaining portion of the normal operation voltage range of the pull-down circuit falls outside the normal operation voltage range of the push-up circuit.