Artículo
Low-voltage tunable pseudo-differential transconductor with high linearity
Autor/es | Gómez Galán, Juan Antonio
Pedro Carrasco, Manuel Pennisi, Melitta López Martín, Antonio González Carvajal, Ramón Ramírez Angulo, Jaime |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Electrónica |
Fecha de publicación | 2009 |
Fecha de depósito | 2015-03-05 |
Publicado en |
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Resumen | A novel tunable transconductor is presented. Input
transistors operate in the triode region to achieve
programmable voltage-to-current conversion. These
transistors are kept in the triode region by a novel
negative ... A novel tunable transconductor is presented. Input transistors operate in the triode region to achieve programmable voltage-to-current conversion. These transistors are kept in the triode region by a novel negative feedback loop which features simplicity, low voltage requirements, and high output resistance. A linearity analysis is carried out which demonstrates how the proposed transconductance tuning scheme leads to high linearity in a wide transconductance range. Measurement results for a 0.5 μm CMOS implementation of the transconductor show a transconductance tuning range of more than a decade (15 μA/V to 165 μA/V) and a total harmonic distortion of −67 dB at 1 MHz for an input of 1 Vpp and a supply voltage of 1.8 V. |
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