Comment by periblepsis on Problem with measuring the saturation voltage of a bipolar transistor using a four-wire connection

@wewqewqewq High level injection effects and ohmic resistance get conflated into measurements made at 800 mA. Not knowing the exact details of your procedure, I also worry about heating effects making results time-dependent and difficult to control. Can you discuss the details of your methods? (These measurements should be set to take place in region II, only, and not region I or III.)