Transistor gain meter (CB20522E)

This circuit was found in a publication in the 1950s, mainly applying to germanium transistors of the time.

INA240 – Zero Drift Sensors Amplifiers (COM167E)
January 2017 - Through Mouser Electronics Texas Instruments is launching its new zero-drift...
Transformerless Powersupply 3 to 12 V (CB1379E )
For a maximum current of 50 mA the capacitor must be from 470 nF to 250 V if the grid is 110 V and...
Toshiba TCKE8xx eFuse IC
Toshiba TCKE8xx eFuse IC Toshiba provides through Mouser Electronics circuits over current...