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Mostrando ítems 1-10 de 14
Artículo
An Op-Amp Approach for Bandpass VGAs With Constant Bandwidth
(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 while the other has essentially reduced bandwidth variations with varying gain. Servo-loops and ...
Artículo
Soluciones para la monitorización de trabajadores en obra mediante tecnologías inalámbricas
(2012)
La prevención activa puede implementar diferentes barreras de seguridad. El estado de la técnica de los sistemas de inteligencia ambiental permite construir sistemas inteligentes que, mediante la utilización de redes ...
Artículo
Passive RFID-Based Inventory of Traffic Signs on Roads and Urban Environments
(MDPI, 2018-07)
This paper presents a system with location functionalities for the inventory of traffic signs based on passive RFID technology. The proposed system simplifies the current video-based techniques, whose requirements regarding ...
Artículo
CMOS First-Order All-Pass Filter With 2-Hz Pole Frequency
(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 0.08-dB passband ripple and 0.029-mm 2 Si area. It has 0.38-mW power consumption in strong inversion ...
Artículo
Super class AB RFC OTA with adaptive local common-mode feedback
(IET (Institution of Engineering and Technology), 2018)
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 ...
Artículo
Intelligent containers based on a Low-Power sensor network and a Non-Invasive acquisition system for management and tracking of goods
(Institute of Electrical and Electronics Engineers (IEEE), 2018-08)
This paper presents a prototype of a system for intermodal freight transport with electronics management of goods. The system is based on low-power wireless networks connecting intelligent containers. The proposed intelligent ...
Artículo
±0.25-V Class-AB CMOS Capacitance Multiplier and Precision Rectifiers
(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 high-performance capacitance multiplier able to operate with supplies as low as ±0.25 V is presented. It is ...
Artículo
Compact Embedded Wireless Sensor-Based Monitoring of Concrete Curing
(MDPI, 2018-03-15)
This work presents the design, construction and testing of a new embedded sensor system for monitoring concrete curing. A specific mote has been implemented to withstand the aggressive environment without affecting the ...
Artículo
An Amplified Offset Compensation Scheme and its Application in a Track and Hold Circuit.
(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 amplified version of the offset during the hold phase, which is used in attenuated fashion during the ...
Artículo
A Highly Efficient Composite Class-AB-AB Miller Op-Amp With High Gain and Stable From 15 pF Up To Very Large Capacitive Loads
(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 on local common-mode feedback to provide class-AB operation with enhanced effective gm , open-loop ...