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Show Us Your Curve Tracer

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Electro Fan:
It is very interesting to see the various approaches to "Curve Tracers":  analog, digital, hardware, hardware plus software, standalone, with an oscilloscope, with a computer, with a SMU - in each case the design reflects the objectives and other thinking of the designer(s).  Some curve tracers are for transistors, some for tubes, some for other active devices and/or passive components - lots of possibilities.

I think there might be a bit of a resurgence coming in curve tracers, for various reasons and purposes, not the least of which is education. 

Please feel free to post your favorite curve tracers (including any images or links) that you use, built, or designed.  Tell us a little bit about your use case(s) and what you like about your curve tracer and what if anything you might like it to do differently.  Or feel free to post other related info that helps show the various uses and designs for assembled, kit, or DIY curve tracers. 

Some people say that the world's first curve tracer was a Tektronix 570 but maybe someone knows of earlier curve tracers.

Here are several links for people wanting to get oriented toward curve tracers (intended to show some of the principles of curve tracers, not to advocate any particular product):

Electro Fan:
A few more links in case it stimulates any posts.

Excellent fundamental video on curves by W2AEW:

A very cool curve tracer:  ELV KS7000

A pretty practical/useful tracer:  DCA75 - Atlas DCA Pro Advanced Semiconductor Analyser

An ideal entry/intermediate curve tracer (imo) might combine some of the functionality of the ELV KS7000 and the Peak DCA75  :)

Edit  Added comments and link:

An extension of the integration of ELV-like and PEAK-like functionality might be something like these Huntron products:

The realm beyond Huntron seems to go in the directions of perhaps still more functionality and flexibility and no doubt higher voltage thresholds as pioneered by the vintage Tektronix curve tracers.

Edit  Added:

Edit  Added:

Here is a 3D red-cyan anaglyph of my Tektronix 575 curve tracer.  It requires red (left) - cyan (right) anaglyph 3D glasses to view.  Click on it for a full size version.


capt bullshot:
Recently I've used my Tek 577 to test a simple circuit (PWM to Resistance converter for a particular purpose):

The curve tracer is set to 0.1V/div, 50uA/div and 0.1mA per step with some offset.
Not too linear, but I believe it'll do the job as it will be part of a closed loop. The circuit is intended to control the output voltage of a COTS SMPS by paralleling its output side to the adjustment pot. Voltage across that pot is low enough for this circuit to work. Of course, the curve tracer doesn't apply an PWM signal to the photocoupler, but PWM will be fast enough it gets smoothed out by the systems frequency response.

I used a 33120A and TDS210 as a curve tracer here to test a tunnel diode:

33120A has a floating output which makes this easier to do.


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