请教问题

manbashe

file:///C:/DOCUME~1/liuchang/LOCALS~1/Temp/msohtmlclip1/01/clip_image002.gif
Statement i): The small signal output resistance of a MOS transistor decreases with increasing bias current.
Statement ii): An Operating Point analysis (OP) is not requirement to determine the small signal AC gain of a circuit.
Which of the following is correct?
²
Statement i) is true; Statement ii) is true.
²
Statement i) is true; Statement ii) is false.
²
Statement i) is false; Statement ii) is true.
²
Statement i) is false; Statement ii) is false.

file:///C:/DOCUME~1/liuchang/LOCALS~1/Temp/msohtmlclip1/01/clip_image002.gif
Statement (i) the output resistance of an ideal current source is expected to be very small (almost zero).
Statement (ii) An N-input CMOS encompasses N+2 transistors.
Which of the following is correct?
²
Statement (i) is true & Statement (ii) is true
²
Statement (i) is true & Statement (ii) is false
²
Statement (i) is false & Statement (ii) is true
               Statement (i) is false & Statement (ii) is false


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Which is the physical state of a MOS transistor which is switched on?
²
Accumulation
²
Cut-off
²
Strong inversion

以上问题请高人指点，小妹在这里谢过！！