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Listar Artículos (Ingeniería Electrónica) por autor "Ramírez Angulo, Jaime"
Mostrando ítems 1-20 de 22
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±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 J. (IEEE (Institute of Electrical and Electronics Engineers), 2019)Reduction of minimum supply requirements is a crucial aspect to decrease the power consumption in VLSI systems. A ...
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±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 J.; González Carvajal, Ramón (MDPI, 2022-09)A high performance bulk-driven rail-to-rail fully differential buffer operating from ±0.3V supplies in 180 nm CMOS technology ...
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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 J.; González Carvajal, Ramón (IEEE (Institute of Electrical and Electronics Engineers), 2018)In this paper, a highly power-efficient class-AB–AB Miller op-amp is discussed. The structure uses gm enhancement based ...
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An Amplified Offset Compensation Scheme and its Application in a Track and Hold Circuit.
Pourashraf, Shirin; Ramírez Angulo, Jaime; Cabrera Galicia, Alfonso R.; López Martín, Antonio J.; González Carvajal, Ramón (IEEE (Institute of Electrical and Electronics Engineers), 2018)This brief proposes a fully differential track and hold circuit using a new dc offset compensation scheme. It stores an ...
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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
Anindita, Paul; Ramírez Angulo, Jaime; Díaz Sánchez, Alejandro; López Martín, Antonio J.; González Carvajal, Ramón; X. Li, Frank (Institute of Electrical and Electronics Engineers Inc., 2021)A compact power-efficient class-AB Miller op-amp is introduced. It uses a simple auxiliary circuit that enhances the ...
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An Op-Amp Approach for Bandpass VGAs With Constant Bandwidth
Pourashraf, Shirin; Ramírez Angulo, Jaime; López Martín, Antonio J.; González Carvajal, Ramón; Algueta Miguel, José María (IEEE (Institute of Electrical and Electronics Engineers), 2018)Two approaches to implement variable gain amplifiers based on Miller op-amps are discussed. One has true constant bandwidth ...
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Biasing CMOS amplifiers using MOS transistors in subthreshold region
Bikumandla, Manoj; González Carvajal, Ramón; Ramírez Angulo, Jaime; Urquidi, Carlos; López Martín, Antonio (2004)The implementation of large-valued floating resistive elements using MOS transistors in subthreshold region is addressed. ...
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Class AB Voltage Follower and Low-Voltage Current Mirror with Very High Figures of Merit Based on the Flipped Voltage Follower
Ramírez Angulo, Jaime; Paul, Anindita; Gangineni, Manaswini; Hinojo Montero, José María; Huerta Chua, Jesús (MDPI, 2023)The application of the flipped voltage follower to implement two high-performance circuits is presented: (1) The first ...
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CMOS First-Order All-Pass Filter With 2-Hz Pole Frequency
Paul, Anindita; Ramírez Angulo, Jaime; López Martín, Antonio J.; González Carvajal, Ramón (IEEE (Institute of Electrical and Electronics Engineers), 2018)A CMOS fully integrated all-pass filter with an extremely low pole frequency of 2 Hz is introduced in this paper. It has ...
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Design of two-stage class AB CMOS buffers: a systematic approach
López Martín, Antonio; Algueta Algueta, José María; Acosta Cabanillas, Lucía; Ramírez Angulo, Jaime; González Carvajal, Ramón (2011)A systematic approach for the design of two-stage class AB CMOS unity-gain buffers is proposed. It is based on the inclusion ...
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Energy-Efficient Amplifiers Based on Quasi-Floating Gate Techniques
López-Martín, Antonio J.; Garde, M. Pilar; Algueta-Miguel, Jose M.; Beloso-Legarra, Javier; González Carvajal, Ramón; Ramírez Angulo, Jaime (MDPI, 2021-04)Energy efficiency is a key requirement in the design of amplifiers for modern wireless applications. The use of quasi-floating ...
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FVF-Based Low-Dropout Voltage Regulator with Fast Charging/Discharging Paths for Fast Line and Load Regulation
Hinojo Montero, José María; Luján Martínez, Clara Isabel; Torralba Silgado, Antonio Jesús; Ramírez Angulo, Jaime (Electronics and Telecommunications Research Institute (ETRI), 2017-06)A new internally compensated low drop-out voltage regulator based on the cascoded flipped voltage follower is presented ...
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High current efficiency classAB OTA with high open loop gain and enhanced bandwidth
Pourashraf, Shirin; Ramírez Angulo, Jaime; Román Loera, Alejandro; López Martín, Antonio J.; Díaz Sánchez, Alejandro; González Carvajal, Ramón (IEICE, 2017)An efficient class-AB OTA with enhanced output current, slew rate, open loop gain, and gain bandwidth is presented. The ...
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Internally compensated LDO regulator based on the cascoded FVF
Hinojo Montero, José María; Luján Martínez, Clara Isabel; Torralba Silgado, Antonio Jesús; Ramírez Angulo, Jaime (Elsevier, 2014-10)In this paper, an internally compensated low dropout (LDO) voltage regulator based on the Flipped Voltage Follower (FVF) ...
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Low-Voltage 0.81mW, 1-32 CMOS VGA with 5% Bandwidth variations and 38dB DC rejection
Rico-Aniles, Héctor Daniel; Ramírez Angulo, Jaime; Rocha-Pérez, José Miguel; López-Martín, Antonio J.; González Carvajal, Ramón (Institute of Electrical and Electronics Engineers (IEEE), 2020-06)A CMOS low-voltage amplifier with approximately constant bandwidth and DC rejection is introduced. The design is based on ...
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Low-voltage tunable pseudo-differential transconductor with high linearity
Gómez Galán, Juan Antonio; Pedro Carrasco, Manuel; Pennisi, Melitta; López Martín, Antonio; González Carvajal, Ramón; Ramírez Angulo, Jaime (2009)A novel tunable transconductor is presented. Input transistors operate in the triode region to achieve programmable ...
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Low-voltage wide gm adjustable range highly linear bicmos OTA
Ramírez Angulo, Jaime; Sawant, Milind S.; López Martín, Antonio; González Carvajal, Ramón (2005)A low distortion low-voltage BiCMOS OTA with wide gm adjustment range and constant input range is presented. It is based ...
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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 J.; González Carvajal, Ramón; Rocha-Pérez, José Miguel; Garde, M. Pilar (IEEE, 2020)A technique to implement true-sample-and-hold circuits that hold the output for almost the entire clock cycle without ...
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Super class AB RFC OTA using nonlinear current mirrors
Garde, M.P.; López Martín, A.J.; González Carvajal, Ramón; Ramírez Angulo, Jaime (Institution of Engineering and Technology (IET), 2018)An alternative approach to the design of super class AB recycling folded cascode operational transconductance amplifiers ...
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Super class AB RFC OTA with adaptive local common-mode feedback
Garde, M.P.; López Martín, A.J.; González Carvajal, Ramón; Ramírez Angulo, Jaime (IET (Institution of Engineering and Technology), 2018)A super class AB recycling folded cascode operational transconductance amplifier is presented. It employs local common-mode ...