Then, most transistors that would do high voltages had terrible Hfe – so the common emitter input id the current gain and biased the HV-but-otherwise-crappy output transistor. And yes, of course ...

Just as the common emitter amplifier and common base amplifier each tied those respective transistor terminals to a fixed potential and used the other two terminals as amplifier input and output ...

TOKYO--(BUSINESS WIRE)--Toshiba Corporation (TOKYO: 6502) today announced the launch of a new line-up of low input current type transistor output photocouplers that guarantee high CTR (Current ...