Rail-to-rail amplifier input stage with constant g/sub m/ and commonmode elimination |
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| Authors: | Fischer TW Karsilayan AI |
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| Affiliation: | Dept. of Electr. Eng., Texas A&M Univ., College Station, TX; |
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| Abstract: | A new scheme for achieving rail-to-rail input to an amplifier is introduced. Constant g/sub m/ and common mode removal is obtained by using a single input differential pair and tunable DC level shifters via multiple input floating gate transistors. The feedback circuitry basically fixes the common mode of the amplifier, resulting in consistent and stable operation for rail-to-rail inputs and a high common mode rejection ratio. |
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