Av value is needed for converting from measured value to input refered value.
Next, I removed Rs and connected source to ground directly, and measured Id2 again. And then I measured the drain current Id1 and Vgs. So that, source resistance Rs was set to a small value (2ohms to 10ohms, depends on JFET type). The measurement circuit is shown below.įirst, I had to measure the gm of the JFET under test.
I measured input voltage noise, including flicker (or 1/f) noise, for various type of n-JFETs.
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