Výsledky vyhledávání - "Ramon G. Carvajal"

Akademický článek

Energy-Efficient Amplifiers Based on Quasi-Floating Gate Techniques

Autor: Antonio Lopez-Martin, Maria Pilar Garde, Jose M. Algueta-Miguel, Javier Beloso-Legarra, Ramon G. Carvajal, Jaime Ramirez-Angulo

Publikováno v: Applied Sciences, Vol 11, Iss 7, p 3271 (2021)

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 illustrate different QFG circuit

Externí odkaz: https://doaj.org/article/0e182bb1dbc54e6c80ec048d933936d1

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Compressive-Sensing-Based Reflectometer for Sparse-Fault Detection in Elevator Belts

Autor: Eduardo Hidalgo-Fort, Ramon G. Carvajal, Fernando Muñoz Chavero, Jose R. Garcia Oya

Publikováno v: IEEE Transactions on Instrumentation and Measurement. 69:947-949

This article presents a design approach to the early detection of elevator-belt failures. The proposed system is based on the time-domain reflectometer (TDR) techniques with the objective to detect the presence and location of faults along the cables

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::44252f50eb33412d6609e97cc15f11aa
https://doi.org/10.1109/tim.2020.2970832

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Pseudo-Three-Stage Miller Op-Amp With Enhanced Small-Signal and Large-Signal Performance

Autor: Anindita Paul, Antonio J. Lopez-Martin, Ramon G. Carvajal, Jaime Ramirez-Angulo, Jose Miguel Rocha-Perez

Publikováno v: Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname
Academica-e: Repositorio Institucional de la Universidad Pública de Navarra
Universidad Pública de Navarra

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 the input stage and essentia

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::548794e727a1ecfb4a51558867fefcc6
https://doi.org/10.1109/tvlsi.2019.2918235

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Energy-efficient amplifiers based on quasi-floating gate techniques

Autor: Jaime Ramirez-Angulo, Maria Pilar Garde, Jose Maria Algueta-Miguel, Ramon G. Carvajal, Javier Beloso-Legarra, Antonio J. Lopez-Martin

Publikováno v: idUS. Depósito de Investigación de la Universidad de Sevilla
instname
Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
Applied Sciences
Volume 11
Issue 7
Applied Sciences, Vol 11, Iss 3271, p 3271 (2021)
Academica-e: Repositorio Institucional de la Universidad Pública de Navarra
Universidad Pública de Navarra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79481b7900c1e5251743f9954a4ff9b6
https://hdl.handle.net/2454/39600

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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

Autor: Anindita Paul, Ramon G. Carvajal, Jaime Ramirez-Angulo, Antonio J. Lopez-Martin, Alejandro Diaz Sanchez, Frank X. Li

Publikováno v: idUS. Depósito de Investigación de la Universidad de Sevilla
instname
Academica-e. Repositorio Institucional de la Universidad Pública de Navarra

Article number 9422790 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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e5ee392670cb576d6f8959bc11b2bb5

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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

Autor: Frank X. Li, Antonio J. Lopez-Martin, Jaime Ramirez-Angulo, Alejandro Diaz Sanchez, Anindita Paul, Ramon G. Carvajal

Publikováno v: Academica-e: Repositorio Institucional de la Universidad Pública de Navarra
Universidad Pública de Navarra
Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname

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 to implement the regulated cas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a070a7bc1ade0542d5c82088b4666d4
https://hdl.handle.net/2454/39568

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Low Power Fully Differential CMOS First Order All Pass Filter with 0.2- 4.8Hz Variable Pole Frequency

Autor: Ramon G. Carvajal, Alejandro Diaz-Sanchez, Jaime Ramirez-Angulo, Antonio J. Lopez-Martin, Anindita Paul

Publikováno v: 2020 IEEE 14th Dallas Circuits and Systems Conference (DCAS).

A fully differential and fully integrated low voltage all pass filter operated in the sub-threshold region with variable pole frequency designed in CMOS 130nm technology is presented in this paper. It has only 0.09dB passband ripple. It works with ±

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da06c356da010290b49e933654405ee9
https://doi.org/10.1109/dcas51144.2020.9330645

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Low-Voltage 0.81mW, 1-32 CMOS VGA with 5% Bandwidth variations and 38dB DC rejection

Autor: Hector Daniel Rico-Aniles, Ramon G. Carvajal, Antonio J. Lopez-Martin, Jaime Ramirez-Angulo, Jose Miguel Rocha-Perez

Publikováno v: idUS: Depósito de Investigación de la Universidad de Sevilla
Universidad de Sevilla (US)
Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname
idUS. Depósito de Investigación de la Universidad de Sevilla
Academica-e: Repositorio Institucional de la Universidad Pública de Navarra
Universidad Pública de Navarra

A CMOS low-voltage amplifier with approximately constant bandwidth and DC rejection is introduced. The design is based on the cascade of a wide linear input range OTA, an op-amp and a servo-loop with extremely large time constants. It operates with +

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e41ff842aac0c8fea574f3330bbf1d34

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1-V 15-μW 130-nm CMOS super class AB OTA

Autor: Jaime Ramirez-Angulo, Antonio J. Lopez-Martin, M. Pilar Garde, Jose M. Algueta, Ramon G. Carvajal

Publikováno v: Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname
ISCAS

A super class AB recycling folded cascode amplifier in 130 nm CMOS is presented. It combines for the first time adaptive biasing of the differential input pair, nonlinear current mirrors with current starving and dynamic biasing of the cascode transi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8adb633bc99ddb631fd777fd370bd8c5
https://hdl.handle.net/2454/42117

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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

Autor: Jose Miguel Rocha-Perez, Antonio J. Lopez-Martin, M. Pilar Garde, Hector Daniel Rico-Aniles, Jaime Ramirez-Angulo, Ramon G. Carvajal

Publikováno v: idUS: Depósito de Investigación de la Universidad de Sevilla
Universidad de Sevilla (US)
idUS. Depósito de Investigación de la Universidad de Sevilla
instname
Academica-e: Repositorio Institucional de la Universidad Pública de Navarra
Universidad Pública de Navarra
IEEE Access, Vol 8, Pp 66508-66516 (2020)
Academica-e. Repositorio Institucional de la Universidad Pública de Navarra

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 Miller op-amp with an auxilia

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40df77bcf1e33748d0212af190aa3d63

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