Search results for "Transimpedance amplifier"

showing 2 items of 2 documents

Current-Based Measurement Technique for High Sensitivity Detection of Resistive Bridges With External Balancing Through Control Voltages

2017

We present a novel approach based on differential measurements of dc currents with very high sensitivity suitable for the detection of very small variations of resistors in Wheatstone full-bridge configurations. External control voltages allow for the compensation of the bridge unbalancing avoiding the need of changing its elements so making the solution suitable for integrated sensor systems. The proposed current-based measurement technique has been implemented through three different circuits, in transimpedance configuration and without the use of any further amplification stage, employing only two active blocks that allow for a very high integration level. The main characteristics of the…

Transimpedance amplifierEngineeringWheatstone bridge02 engineering and technology01 natural sciencescurrent-mode approachlaw.inventionlaw0202 electrical engineering electronic engineering information engineeringElectronic engineeringSensitivity (control systems)Electrical and Electronic Engineeringhigh sensitivity detectionInstrumentationBridge balancing; CCII; current-mode approach; high sensitivity detection; resistive Wheatstone bridge; Instrumentation; Electrical and Electronic EngineeringElectronic circuitResistive touchscreenbusiness.industry020208 electrical & electronic engineering010401 analytical chemistryBreadboard0104 chemical sciencesCCIIResistorBridge balancingbusinessresistive Wheatstone bridgeVoltageIEEE Sensors Journal
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Fractional Modeling of the AC Large-Signal Frequency Response in Magnetoresistive Current Sensors

2013

Fractional calculus is considered when derivatives and integrals of non-integer order are applied over a specific function. In the electrical and electronic domain, the transfer function dependence of a fractional filter not only by the filter order n, but additionally, of the fractional order α is an example of a great number of systems where its input-output behavior could be more exactly modeled by a fractional behavior. Following this aim, the present work shows the experimental ac large-signal frequency response of a family of electrical current sensors based in different spintronic conduction mechanisms. Using an ac characterization set-up the sensor transimpedance function  is obtain…

Transimpedance amplifierFrequency responseEngineeringMagnetoresistanceGiant magnetoresistancemagnetoresistance sensorfractional systemslcsh:Chemical technologyTopologyBiochemistryArticleAnalytical ChemistryCondensed Matter::Materials Scienceelectrical current measurementlcsh:TP1-1185Electrical and Electronic Engineeringsystems identificationInstrumentationSpintronicsbusiness.industryElectrical engineeringelectrical current measurement; magnetoresistance sensor; fractional systems; systems identificationCondensed Matter::Mesoscopic Systems and Quantum Hall EffectAtomic and Molecular Physics and OpticsFractional calculusTunnel magnetoresistanceFilter designbusinessSensors
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