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López Martín, Antonio

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https://academica-e.unavarra.es/handle/2454/49446

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López Martín

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Antonio

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Ingeniería Eléctrica, Electrónica y de Comunicación

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ISC. Institute of Smart Cities

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0000-0001-7629-0305

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2254

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Author: López Martín, Antonio × Author: González Carvajal, Ramón × Author: Díaz Sánchez, Alejandro × Subject: Class-AB amplier ×

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    An enhanced gain-bandwidth class-AB miller op-amp with 23,800 MHz pF/mW FOM, 11-16 current efficiency and wide range of resistive and capacitive loads driving capability
    (IEEE, 2021) Paul, Anindita; Ramírez-Angulo, Jaime; Díaz Sánchez, Alejandro; López Martín, Antonio; González Carvajal, Ramón; Li, Frank X.; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Institute of Smart Cities - ISC; Ingeniería Eléctrica y Electrónica
    A compact power-efficient class-AB Miller op-amp is introduced. It uses a simple auxiliary circuit that enhances the op-amp's gain-bandwidth product and helps to drive a wide range of capacitive and resistive loads with high static and dynamic current efficiency. Simple Miller compensation is used to obtain stability over a wide range of loading conditions. The op-amp's simulation and experimental results in strong inversion with 15uA bias current and in sub-threshold with 250nA bias current are shown. Its performance is measured in terms of dynamic and static current efficiency figures of merit FOMCEDyn and FOMCEStat: and using the conventional small-signal figure of merit FOMSS: Experimental results of op-amps fabricated in a 130nm CMOS technology are shown that validate the proposed approach.