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Sat May 17 14:43:06 EDT 2014

BJT: switching or amplifier?

What's the difference between BJTs designed for switching applications
vs. amplifier applications?

Some differences:
- Max current
- Noise
- Different distribution of capacitances



Datasheets don't tell me much.  How to get an answer to this?


NPN

BC549  switching + amplifier
2N3904 general purpose amplifier


MOSFET

2N7000 Is the only one I found mentioning pulsed currents of 2A (400mA
sustained.  Suggested as a gate driver = charging/discharging a
capacitor.  



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