Simple circuit lets you characterize JFETs

https://www.electronics-lab.com/simple-circuit-lets-you-characterize-jfets/

by John Fattaruso @ edn.com: When working with discrete JFETs, designers may need to accommodate a large variation in device parameters for a given transistor type. A square-law equation is usually used as an approximate model for the drain-current characteristic of the JFET: ID=β(VGS−VP)2, where ID is the drain current, VGS is the gate-to-source voltage, β […]