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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.
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 ...
An introduction to eddy current testing from the NDE/NDT resource center Archived 2006-05-07 at the Wayback Machine; Intro to Eddy Current Testing by Joseph M. Buckley (pdf, 429 kB) Eddy Current Testing at Level 2, International Atomic Energy Agency, Vienna, 2011 (pdf 5.6 MB).
Current mode logic (CML), or source-coupled logic (SCL), is a digital design style used both for logic gates and for board-level digital signaling of digital data.. The basic principle of CML is that current from a constant current generator is steered between two alternate paths depending on whether a logic zero or logic one is being represented.
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 ...
The award is presented annually for outstanding contributions in electrical measurements, and is sponsored by Keithley Instruments and the IEEE Instrumentation and Measurement Society. [ 1 ] [ 2 ] The award is not to be confused with the similarly-named Joseph F. Keithley Award For Advances in Measurement Science of the American Physical ...
Current in the reference transistor Q 1 is held constant, thereby fixing the compliance voltage. Plots assume I C1 = 10 mA, V A = 50 V, V CC = 5 V, I S = 10 fA, β 1, = 100 independently of current. The current dependence of the resistances r π and r O is discussed in the article hybrid-pi model. The current dependence of the resistor values is: