I did a previous project of a transistor matcher for bipolar and mosfet transistors.
I have sold quite a few.
However a few people have asked for a 1 amp version for more real world testing.
My previous matcher used 45mA max.
So I have reworked the circuit to do up to 1amp.
Power to DUT is from 10 volts through a 10R resistor.
Base current is from a up to 10 volt source through 100r resistor.
The circuit itself is basically numerous differential amplifiers measuring Vce and Vbe to get Ic and Ib.
From this I can work out Hfe.
I have sold quite a few.
However a few people have asked for a 1 amp version for more real world testing.
My previous matcher used 45mA max.
So I have reworked the circuit to do up to 1amp.
Power to DUT is from 10 volts through a 10R resistor.
Base current is from a up to 10 volt source through 100r resistor.
The circuit itself is basically numerous differential amplifiers measuring Vce and Vbe to get Ic and Ib.
From this I can work out Hfe.