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Listar por autor "Ramírez Angulo, Jaime"
Mostrando ítems 1-20 de 33
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Artículo
±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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Ponencia
1.5V Rail-to-rail programmable-gain CMOS amplifier
Ramírez Angulo, Jaime; López Martín, Antonio J.; González Carvajal, Ramón; Lackey, C. (IEEE (Institute of Electrical and Electronics Engineers), 2004)A 1.5V programmable-gain differential amplifier is implemented using a novel design technique for operating closed-loop ...
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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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Ponencia
A piecewise-linear function approximation using current mode circuits
Ramírez Angulo, Jaime; Sánchez Sinencio, Edgar; Rodríguez Vázquez, Ángel Benito (Institute of Electrical and Electronics Engineers, 1992)A methodology to design currentmode circuits for piecewise-linear function approximation is presented. The technique is ...
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Ponencia
A tunable floating-gate CMOS transconductor based on current multiplication
Algueta Miguel, José M.; López Martín, Antonio; Ramírez Angulo, Jaime; González Carvajal, Ramón (2009)In this paper a novel transconductor based on floating gate techniques that performs current multiplication for tuning ...
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Ponencia
Accurate dynamic-feedback CMOS cross-quad suitable for low-voltage operation
Calvo, Belén; López Martín, Antonio; Ramírez Angulo, Jaime; González Carvajal, Ramón (2009)This paper presents the implementation of a crossquad circuit suitable for low-voltage operation. The proposed cell exploits ...
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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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Artículo
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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Artículo
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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Artículo
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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Artículo
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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Ponencia
CMOS operational amplifiers with continuous-time capacitive common mode feedback
Ramírez Angulo, Jaime; Nargis, Ayesha; González Carvajal, Ramón; López Martín, Antonio (2010)A simple and power efficient approach for the implementation of continuous-time common mode feedback networks using a ...
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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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Artículo
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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Artículo
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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Artículo
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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Artículo
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 ...