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  2. Source measure unit - Wikipedia

    en.wikipedia.org/wiki/Source_measure_unit

    Such applications include I-V characterizing and testing semiconductors and other non-linear devices and materials, where sourcing voltage and current source span across both positive and negative values. To accomplish this, SMUs have four-quadrant outputs. [1] For characterization purposes SMUs are bench instruments similar to a curve tracer.

  3. Current sensing - Wikipedia

    en.wikipedia.org/wiki/Current_sensing

    The design of the saturable inductor current sensor is similar to that of a closed-loop Hall-effect current sensor; the only difference is that this method uses the saturable inductor instead of the Hall-effect sensor in the air gap. Saturable inductor current sensor is based on the detection of an inductance change. The saturable inductor is ...

  4. Autocollimator - Wikipedia

    en.wikipedia.org/wiki/Autocollimator

    An autocollimator is an optical instrument for non-contact measurement of angles. They are typically used to align components and measure deflections in optical or mechanical systems. An autocollimator works by projecting an image onto a target mirror and measuring the deflection of the returned image against a scale, either visually or by ...

  5. Environmental scanning electron microscope - Wikipedia

    en.wikipedia.org/wiki/Environmental_scanning...

    Specimen current results from the difference of electron beam current minus the sum of SE and BSE current. However, in the presence of gas and the ensuing ionization, it would be problematic to separate this mode of detection out of the generally operating gaseous detection device. Hence this mode, by its definition, may be considered as ...

  6. Flat-panel detector - Wikipedia

    en.wikipedia.org/wiki/Flat-panel_detector

    Flat-panel detectors are a class of solid-state x-ray digital radiography devices similar in principle to the image sensors used in digital photography and video. They are used in both projectional radiography and as an alternative to x-ray image intensifiers (IIs) in fluoroscopy equipment.

  7. Scanning SQUID microscopy - Wikipedia

    en.wikipedia.org/wiki/Scanning_SQUID_microscopy

    Current exists in the junction without any voltage drop, up to a maximum value, called the critical current, I o. When the SQUID is biased with a constant current that exceeds the critical current of the junction, then changes in the magnetic flux, Φ, threading the SQUID loop produce changes in the voltage drop across the SQUID (see Figure 1).

  8. Radar warning receiver - Wikipedia

    en.wikipedia.org/wiki/Radar_warning_receiver

    A non-combat aircraft, or one attempting to avoid engagements, might turn its own radar off and attempt to steer around threats detected on the RWR. Especially at high altitude (more than 30,000 feet AGL ), very few [ citation needed ] threats exist that don't emit radiation.

  9. Electrostatic fieldmeter - Wikipedia

    en.wikipedia.org/wiki/Electrostatic_Fieldmeter

    It is used for non-contact measurement of electrostatic charge on an object. It measures the force between the induced charges in a sensor and the charge present on the surface of an object. This force is converted to volts , measuring both the initial peak voltage and the rate at which it falls away.

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