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High side current sensing differential amplifier configurations

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High side current sensing differential amplifier configurations

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WATCH RELATED VIDEO: High-side current sensing with discrete difference amplifier circuit

Using the Impedance Analyzer


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The sensed voltage signal is amplified by the subsequent op amp circuits to get measurable output. This video discusses the use of amplifiers in shunt-based current sensing applications as well as the pros and cons of high-side and low-side monitoring. Return to Top. Development Tools What tools do I need? Packs vs.

The input voltage which causes the comparator output to transition from low to high is the magnitude of the difference between the specified threshold and the.

Differential amplifier


The circuit works perfectly in a simulation. However on a bench it doesn't produce any meaningful output. The only voltage that I see on the output is a constant mV. When I put a load on a circuit and draw more than 1 amp the only thing that changes is that a small ripple adds on top of the mV offset. When I check the voltage drop on the resistor with a voltmeter it is the expected 1 volt or so. When I place the 1. I thought that maybe I am trying to operate the opamp too close to the rails so I tried to use voltage dividers as so:.

0 to 50 A Current Sensor ICs with Integrated Conductor

high side current sensing differential amplifier configurations

Why is Q Factor Important for an Inductor? What are the Film Capacitor and Its Application? In electronics, current sense amplifiers are special-purpose amplifiers that output a voltage proportional to the current flowing in a power rail. They are often referred to as current shunt amplifiers because they use a shunt resistor in the power rail that provides a slight voltage drop when the current flows through the resistor. These devices are designed to handle common mode voltages in excess of their own supply voltage.

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Sensing the current trends


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US6492845B1 - Low voltage current sense amplifier circuit - Google Patents

One of the key inputs for automotive diagnostic assessments is current measurement. An increased focus on functional safety requirements is driving demand for improved system diagnostics. One of the key inputs for these diagnostic assessments is current measurement. As discussed previously in Signal Chain Basics , it is important to understand how to interpret data sheets in order to calculate the accuracy of your high-side implementation. In addition, understanding the impact of the external components is critical to arriving at the correct current measurement. Win foldable backpack! There are two common methods for measuring current in a high-side configuration:. Figure 1 Operational amplifier circuit used for high-side current measurement.

The MAX high-side current-sense amplifier offers precision accuracy specifications of VOS less than μV. (max) and gain error less than % (max).

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Accurate high-side current sensing is necessary in many applications, including motor control, solenoid control, and power management for example, dc-to-dc converters and battery monitoring.

Brian Black at Linear Technology Corp. Examples of applications which implement current measurement include motor torque, solenoid force, LED intensity, solar cell exposure and battery power. To measure current, a sense resistor is placed directly in series with the current, and an amplifier isolates and amplifies the voltage across this resistor V SENSE. New amplifiers, specifically optimised for this task are becoming widely adopted in many applications from automotive to industrial, and from communications to computing. Two common methods of current measurement are high-side and low-side sensing.

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