Current Sources
Keithley introduces its model 6221 AC and DC current source and model 6220 DC current source. The model 6221 is the only AC current source on the market. Until now, researchers and engineers have been forced to build their own AC current sources. The model 6221 is a current source waveform generator; pulse widths as short as five microseconds can be programmed, and the instrument supports pulsed I-V measurements. Both current sources are fully programmable via the front panel controls or from an external controller via RS-232 or GPIB interfaces; the Model 6221 also features an Ethernet interface for remote control from anywhere there's an Ethernet connection. Both instruments can source DC currents from 100 fA to 100 mA; the model 6221 can also source AC currents from 1 pA to 100 mA. Both models offer tools for defining current ramps and stepping through predefined sequences of up to 64,000 output values using a trigger or a timer. Both sources support linear, logarithmic, and custom sweeps. The model 6221's combination of high source resolution and megahertz update rates makes it capable of producing high fidelity current signals that are indistinguishable from analog current ramps.
Keithley Instruments, Inc.
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, OH, 44139
© 2008 Advantage Business Media
|
