Patent ID: 6812796
Filing Date: 2004-11-02
Classification: H03F

Abstract:
A multistage amplifier comprising:a first gain stage comprising a first input terminal and a first output terminal; a second gain stage comprising: a first input terminal; a differential pair, said differential pair comprising a first transistor and a second transistor; said first feedback path coupled between a first terminal and a control terminal of said first transistor, said first feedback path configured to provide a first feedback signal to said control terminal of said first transistor representative of a first signal level at said first terminal of said first transistor; and a second said second feedback path configured to provide a second feedback signal to said control terminal of said second transistor representative of a second signal level at said first terminal of said second transistor, wherein said first feedback path further comprises a first sense element coupled to said first terminal of said first transistor, said first sense element configured to sense said first signal level at said first terminal of said first transistor, and said second feedback path further comprises a second sense element coupled to said first terminal of said second transistor, said second sense element configured to sense said second signal level at said first terminal of said second transistor; and a first inter-stage resistive element coupled in series to said first output terminal of said first gain stage and said first input terminal of said second gain stage.