Título:
Operational amplifier power optimization for a given total (slewing plus linear) settling time
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Autor:
Silveira, Fernando
Flandre, Denis
Flandre, Denis
Tutor:
Tipo de documento:
Artículo
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Palabras clave:
Operational amplifiers
SPICE
Circuit CAD
Circuit simulation
Circuit optimisation
SPICE
Circuit CAD
Circuit simulation
Circuit optimisation
Descriptores:
ELECTRÓNICA
Año de publicación:
2002
Contenido:
Resumen:
A design procedure that determines the combination of linear settling time (i.e. gain bandwidth) and slew rate that minimizes an amplifier total power consumption, while complying with a given total settling time specification, is presented. The method is presented for a Miller OTA, but can be generalized to other architectures. The proposed approach also provides the optimum combination of the g/sub m//I/sub D/ ratios of the input and output transistors and the transistor design corresponding to this optimum of power consumption. It is shown that the application of fixed "rules of thumb" criteria for the assignment of the allowable linear settling and slewing periods leads to highly increased consumption. The method is based on a simple, design oriented model of the settling behavior that is also described in this paper. This model is checked against experimental results and the design procedure results are verified with SPICE simulations
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IEEE
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Citación:
Silveira, F, Flandre, D. Operational amplifier power optimization for a given total (slewing plus linear) settling time. 15th Symposium on Integrated Circuits and Systems Design, Porto Alegre, Brazil, 2002. doi 10.1109/SBCCI.2002.1137666
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Departamento académico:
Electrónica
Grupo de investigación:
Microelectrónica
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