Abstract
A 0.9 V, 0.5 /spl mu/A, rail-to-rail CMOS operational amplifier designed with weak inversion techniques is presented. Depletion-mode NMOS transistors buffer a bulk-driven PMOS differential pair to realize wide input dynamic range, while the output stage architecture provides symmetric rail-to-rail output drive through the use of a low voltage translinear control circuit.
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