I'm thinking about a strange working mode: the CB part is forward biased and trying to control EC current by CB current. EB is reversed. May it work?
Transistor is BJT.
Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up.Sign up to join this community
Yes, BJTs will work in reverse mode (collector and emitter switched).
Most types will have very low gain (5 or 15 rather than 100 or 300) and the breakdown voltage is generally very low, less than 10V.
A few are made to be symmetrical and don't much care which way you connect them.
The TTL input multiple-emitter transistor works in such a reverse mode when a logical "1" (+5 V) is applied to the input emitter. Then, in contrast to the usual common-emitter configuration, the emitter is connected to Vcc and the collector to ground.
As far as I can remember, this mode has been also used in the past in transistor switches due to the lower collector-emitter saturation voltage VCEsat (at output logical "0").