• ±0.25 V Class-AB CMOS capacitance multiplier and precision rectifiers 

      Pourashraf, Shirin; Ramírez-Angulo, Jaime; Hinojo Montero, José María; González Carvajal, Ramón; López Martín, Antonio Upna Orcid (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      Reduction of minimum supply requirements is a crucial aspect to decrease the power consumption in VLSI systems. A high performance capacitance multiplier able to operate with supplies as low as ±0.25 V is presented. It is ...
    • ±0.3v bulk-driven fully differential buffer with high figures of merit 

      Gangineni, Manaswini; Ramírez-Angulo, Jaime; Vázquez-Leal, Héctor; Huerta-Chua, Jesús; López Martín, Antonio Upna Orcid; González Carvajal, Ramón (MDPI, 2022)   Artículo / Artikulua  OpenAccess
      A high performance bulk-driven rail-to-rail fully differential buffer operating from ±0.3V supplies in 180 nm CMOS technology is reported. It has a differential–difference input stage and common mode feedback circuits ...
    • 360 nW gate-driven ultra-low voltage CMOS linear transconductor with 1 MHz bandwidth and wide input range 

      Rico-Aniles, Héctor Daniel; Ramírez-Angulo, Jaime; López Martín, Antonio Upna Orcid; González Carvajal, Ramón (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      A low voltage linear transconductor is introduced. The circuit is a pseudo differential architecture that operates with ±0.2V supplies and uses 900nA total biasing current. It employs a floating battery technique to achieve ...
    • Class AB amplifier with enhanced slew rate and GBW 

      Garde Luque, María Pilar Upna Orcid; López Martín, Antonio Upna Orcid; Algueta-Miguel, Jose M. Upna Orcid; Ramírez-Angulo, Jaime; González Carvajal, Ramón (John Wiley & Sons, 2019)   Artículo / Artikulua  OpenAccess
      The design of a micropower class AB operational transconductance amplifier with large dynamic current to quiescent current ratio is addressed. It is based on a compact and power-efficient adaptive biasing circuit and a ...
    • CMOS first-order all-pass filter with 2-Hz pole frequency 

      Paul, Anindita; Ramírez-Angulo, Jaime; López Martín, Antonio Upna Orcid; González Carvajal, Ramón (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      A CMOS fully integrated all-pass filter with an extremely low pole frequency of 2 Hz is introduced in this paper. It has 0.08-dB passband ripple and 0.029-mm2 Si area. It has 0.38-mW power consumption in strong inversion ...
    • Energy-efficient amplifiers based on quasi-floating gate techniques 

      López Martín, Antonio Upna Orcid; Garde Luque, María Pilar Upna Orcid; Algueta-Miguel, Jose M. Upna Orcid; Beloso Legarra, Javier Upna Orcid; González Carvajal, Ramón; Ramírez-Angulo, Jaime (MDPI, 2021)   Artículo / Artikulua  OpenAccess
      Energy efficiency is a key requirement in the design of amplifiers for modern wireless applications. The use of quasi-floating gate (QFG) transistors is a very convenient approach to achieve such energy efficiency. We ...
    • 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 

      Paul, Anindita; Ramírez-Angulo, Jaime; Díaz Sánchez, Alejandro; López Martín, Antonio Upna Orcid; González Carvajal, Ramón; Li, Frank X. (IEEE, 2021)   Artículo / Artikulua  OpenAccess
      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 ...
    • Gain-boosted super class AB OTAs based on nested local feedback 

      Beloso Legarra, Javier Upna Orcid; Cruz Blas, Carlos Aristóteles de la Upna Orcid; López Martín, Antonio Upna Orcid; Ramírez-Angulo, Jaime (IEEE, 2021)   Artículo / Artikulua  OpenAccess
      A new approach to design super class AB operational transcon-ductance amplifiers (OTAs) with enhanced large-signal and small-signal performance is presented. It is based on employing two nested positive and negative feedback ...
    • A highly efficient composite class-AB–AB Miller op-amp with high gain and stable from 15 pF up to very large capacitive loads 

      Pourashraf, Shirin; Ramírez-Angulo, Jaime; López Martín, Antonio Upna Orcid; González Carvajal, Ramón (IEEE, 2018)   Artículo / Artikulua  OpenAccess
      In this paper, a highly power-efficient class-AB–AB Miller op-amp is discussed. The structure uses gm enhancement based on local common-mode feedback to provide class-AB operation with enhanced effective gm , open-loop ...
    • Power efficient simple technique to convert a reset-and-hold into a true-sample-and-hold using an auxiliary output stage 

      Rico-Aniles, Héctor Daniel; Ramírez-Angulo, Jaime; López Martín, Antonio Upna Orcid; González Carvajal, Ramón; Rocha-Pérez, José Miguel; Garde Luque, María Pilar Upna Orcid (IEEE, 2020)   Artículo / Artikulua  OpenAccess
      A technique to implement true-sample-and-hold circuits that hold the output for almost the entire clock cycle without resetting to zero is introduced, alleviating the slew rate requirement on the op-amp. It is based on a ...
    • Pseudo-three-stage Miller op-amp with enhanced small-signal and large-signal performance 

      Paul, Anindita; Ramírez-Angulo, Jaime; López Martín, Antonio Upna Orcid; González Carvajal, Ramón; Rocha-Pérez, José Miguel (IEEE, 2019)   Artículo / Artikulua  OpenAccess
      A simple technique to implement highly power efficient class AB-AB Miller op-amps is presented in this paper. It uses a composite input stage with resistive local common mode feedback that provides class AB operation to ...
    • Super class AB RFC OTA with adaptive local common-mode feedback 

      Garde Luque, María Pilar Upna Orcid; López Martín, Antonio Upna Orcid; Carvajal, Ramón G.; Ramírez-Angulo, Jaime (Institution of Engineering and Technology, 2018)   Artículo / Artikulua  OpenAccess
      A super class AB recycling folded cascode operational transconductance amplifier is presented. It employs local common-mode feedback using two matched tuneable active resistors, allowing to adapt the amplifier to different ...
    • Super-gain-boosted AB-AB fully differential Miller op-amp with 156dB open-loop gain and 174MV/V MHZ pF/uW figure of merit in 130nm CMOS technology 

      Paul, Anindita; Ramírez-Angulo, Jaime; Díaz Sánchez, Alejandro; López Martín, Antonio Upna Orcid; González Carvajal, Ramón; Li, Frank X. (IEEE, 2021)   Artículo / Artikulua  OpenAccess
      A fully differential Miller op-amp with a composite input stage using resistive local common-mode feedback and regulated cascode transistors is presented here. High gain pseudo-differential auxiliary amplifiers are used ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
      Logo MinisterioLogo Fecyt