MOSFET-practice-solns

MOSFET-practice-solns - Solution to the practice problems 1...

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Unformatted text preview: Solution to the practice problems 1. V DD A B A B C C Out Out = (AB+C)’ 2. Draw a CMOS circuit for the function: Out = (AB)’ +A’C Out = (AB)’ V DD A B A B Out 3.Analyze the flooolwing NMOS circuit. K = 1mA/V 2 and V to = 1V 4 a) Small signal equivalent circuit: Open circuit voltage gain: Output resistance R o1 : Add a test voltage source and take out v i . The dependent current source becomes only dependent on the test voltage source. That means we can regard it as a resistor with resistance of 1/g m . b) Small signal equivalent circuit: Input resistance R in : 51 50 ) 10 )( ( ) 10 )( ( 1 1 1 = ! " = ! = i o o i m gs m o v v k v v g k v g v g m v gs G S D V i 10k Ƹ V o1 g m v gs G S D V i 10k Ƹ V o1 ! = + ! ! = 196 / 1 10 ) / 1 )( 10 ( 1 m m o g k g k R ! = ! " + = ! + = = 196 ) 10 ))( ( ( ) 10 )( ( 2 2 i i m i i gs m i i i in i k v g i i k v g i i v R g m v gs G S D V i2 10k Ƹ V o 5k Ƹ 2k Ƹ v gs i i g m v gs G S D V i2 10k Ƹ V o 5k Ƹ 2k Ƹ v gs g m v gs G S D V i2 10k...
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MOSFET-practice-solns - Solution to the practice problems 1...

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