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1 International Journal of Microelectronics and Computer Science

1 2010

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Low-power open loop multiply-by-two amplifier with gain-accuracy improved by local-feedback

Gama R., Galhardo A., Goes J., Paulino R., Neves R., Horta N.

International Journal of Microelectronics and Computer Science

2010

Vol. 1, nr 1

19-24

This paper proposes the complete electrical design of a new multiply-by-two amplifier to be readily used in ultra high-speed medium resolution pipeline ADC stages. It is based in a switched-capacitor open-loop structure but with the novelty of having the gain accuracy improved by using an active amplifier with local feedback. Simulation results demonstrate that, with a very low-power dissipation and without employing any digital self-calibration or gain-control techniques, the circuit exhibits, over PVT corner and device mismatches, a dynamic performance and a gain-accuracy compatible with 6-bit level.