Tim Øsleby wrote: >Is what you are saying that MOSFETs takes more beating without going up in >smoke? >If that's the case, this would explain why they are used a lot in PA audio >systems.
Basically, that's the case. The "thermal runaway" problem Rob mentioned is the tendency of bipolar transistors to pass more current when they get hot. This makes them get hotter. Which makes them pass more current. Which makes them get hotter. In a repeating cycle until they fail. Since MOSFETs don't respond this way, they can be more durable in applications calling for continuous high power output. BTW: MOSFETs are also commonly used in the other end of your stereo signal chain: At the front end of radio receiver front end circuitry. Very tiny MOSFETs are also the active ingredient in CMOS image sensors :) -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
