Simultanous sourcing and measuing using Keithley 2611A for FET testing

[lplopez]

Hi,

I am Lorenzo, a graduate student from University of the Philippines. We are currently using Keithley 2611A. It is possible to simultaneously supply voltage and measure current using the said instrument? We are trying to test our field effect transistor and planning to supply gate voltage (Vg) from (Hi and Lo terminals) and measure contact resistance (Va, Vb) from (SHi and SLo). Please see attached schematic diagram. Thank you very much

P.S. The supplied current (Isd) from source to drain will be coming from a separate power supply.

[Misbahd]

Hi Lorenzo,

Since NI does not support the Keithley 2611A, I would contact Tektronix support for questions about this device. 

Tektronix Support

https://www.tek.com/product-support

Best,

Misbah 

[cstorey · Accepted solution]

Yes, an SMU is a source and measure unit.  You can source either current or voltage while simultaneously sensing voltage or current.  If you are going to automate your measurement then there's a LabVIEW driver for the Keithley 2611a - https://www.tek.com/source-measure-units/2635-software/keithley-series-2600-2600a-2600b-native-labvi...

Once you've installed the driver have a look at these two examples..

1. KE26XX Config Source & Measure.vi - How to configure measurement.
2. KE26XXA Advanced Sweep.vi - Sweep I/V and Measure V/I.

You will also need to enable remote sensing (4 wire mode) using the "\Configure\Measure\Measure Sense Mode.vi"

Craig

[Minions]

The 2600BS-901-01_C_Aug_2016_2.pdf manual has an example of your setup on page 2-57.  You can use the SCPI commands to control the device by placing the SMU into 2400 emulation mode.