A: I would say common emiter NPN , For no other reason then people think positive and logic was set aty positive 5 volts
because in ce configuration value of input voltage requried to make the transistor on is very less value of the output voltage or output current
common emitter configuration is use for amplification purpose while common collector is use as buffer as its op is same as ip..
Vcc is used in bipolar transistor circuitsVdd is used in field effect transistor circuitsB+ is used in vacuum tube circuits
transistor//
A transistor is a device used to switch power between electrical components. Transistors work to amplify existing signals as well as open and close circuits.
Yes, transistors can be used as amplifiers, but they are not limited to only this use (they are also used in logic circuits, for example).
output current is zero
The two main functions of a transistor are: (a) signal amplification, and (b) solid-state switching.
It depends on what you want to do with the transistor. Class A, common emitter, is used for voltage amplification. Class C, common collector, is used for current amplification. There are other classes and configurations but, again, it depends on what you want to do.
FET is abbreviation of Field Effect Transistor. This is a transistor in which current is controlled by voltage only and no current is drawn. It is a high input impedence device and is used in computers, telecommunication and control circuits. This transistor is better in certain parameters as compared to BJT, that is Bipolar Junction Transistor.
at this time it is metal oxide field effect transistor. 20 years ago it was mostly bipolar junction transistor, 45 years ago it was point contact or surface barrier transistor. before that it was vacuum tubes and germanium point contact diodes. in the future it may be nanotube field effect transistors, or even DNA logic. both would probably be operating in a thin film of some liquid which would have to be encapsulated.
the common emitter configuration is most widely used in amplifer circuits because of its high voltage,current & power gain.the common emitter configuration is most widely used in amplifer circuits because of its high voltage,current & power gain.