Very Low Voltage Rail-to-Rail Programmable-Gain CMOS Amplifier |
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| Authors: | Jaime Ramírez-Angulo Antonio J. López-Martín Ramón G. Carvajal Chad Lackey |
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| Affiliation: | (1) Klipsch School of Electrical and Computer Engineering, New Mexico State University, Las Cruces, NM 88003, USA;(2) Department of Electrical and Electronic Engineering, Public University of Navarra, Campus Arrosadía, E-31006 Pamplona, Spain;(3) Dpto. de Ingeniería Electrónica, Escuela Superior de Ingenieros, Universidad de Sevilla, Camino de los Descubrimientos, E-41092 Sevilla, Spain |
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| Abstract: | ![]()
A novel design technique for operating closed-loop amplifier circuits at very low supply voltages is proposed. It is based on the use of quasi-floating gate transistors, avoiding issues encountered in true floating-gate structures such as the initial floating-gate charge, offset drift with temperature, and the gain-bandwidth product degradation. A programmable-gain differential amplifier is designed and implemented following this method. Measurement results of an experimental prototype fabricated in a 0.5- m CMOS technology validate on silicon the proposed technique. |
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| Keywords: | low-voltage amplifiers low-voltage analog circuits analog CMOS circuits |
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