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The source measure unit (SMU), or source-measurement unit, is an electronic instrument that is capable of both sourcing and measuring at the same time. It can precisely force voltage or current and simultaneously measure precise voltage and/or current. An SMU instrument can source and sink power in all four quadrants.
Keithley Instruments is a measurement and instrument company headquartered in Solon, Ohio, that develops, manufactures, markets, and sells data acquisition products, as well as complete systems for high-volume production and assembly testing.
where this time is the charge density, is the current density vector, and is the current source-sink term. The current source and current sinks are where the current density emerges > or vanishes <, respectively (for example, the source and sink can represent the two poles of an electrical battery in a closed circuit).
The input current is allowed to flow into the high impedance grid, and the voltage so generated is vastly amplified in the anode circuit. Valves designed for electrometer use have leakage currents as low as a few femtoamperes (10 −15 amperes). Such valves must be handled with gloved hands as the salts left on the glass envelope can provide ...
Figure 1: An ideal current source, I, driving a resistor, R, and creating a voltage V. A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it. A current source is the dual of a voltage source. The term current sink is sometimes used for sources fed from a negative ...
A New Jersey pharmaceutical company has received a "conditional license" for its bird flu vaccine for use in chickens. The vaccine, developed by Zoetis, targets the H5N2 subtype of avian influenza ...