my electronics 1 exam

Apr 18, 2004 1 Replies

well, there were a few things i couldn't figure out:



what's the input resistance to the small signal model of an nMOSFET, in the common source conifguration?



and if you had some signal 0.1sin(2*pi*1000*t) going through an amp with a gain of 1000 v/v , what would be the "first five frequencies" you could measure?



i'm assuming this has to do with the fourier series??



also,



if you've got a BJT amp in the common collector configuration, and it is biased by a current mirror on the emmiter, and the output point is measured at the emmitter, and the small signal AC input is on the base, but there is nothing else on the base,



how do you find the DC bias condition Vce, the voltage across the collector and emitter ??



thanks


sorry, a few clarifications to my question,

for the nMOSFET, there is no other resistors on the gate, and that is where the input is applied

and the gain for the question with the sine signal was only 100 V/V

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