ECE142_2010FALL_EXAM1__[0] - ECE142A Mid-Term Examination...

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ECE142A Fall 2010 Mid-Term Examination Wednesday November 17 th 2010 9am 11am 1. On the attached sheet, sketch the current-voltage characteristics for the transistor configurations shown in Figure 1. Assume that the magnitude of the respective threshold voltages is 1V and that the maximum voltage applied is 5V [ 16 ] . Figure 1 2. For the amplifier reproduced in Figure 2: a. Draw the small signal equivalent circuit - do not ignore channel length modulation or the body effect. [ 10 ] b. Write down the equations required to derive an expression for the small signal voltage gain; include components present due to the body effect and channel length modulation. Annotate the small signal circuit where relevant. [ 20 ] c. Write down an expression for the overall voltage gain. You may leave your answer in terms of any intermediate symbols introduced in ( b ) provided their interpretation is unambiguous. [ 14 ] Figure 2 + - + - + - + - + - - + + - (h) (a) (c) (d) (e) (f) (g) (b ) + - Vdd Vss + M1 M4 M2 M3 M6 M5 M7 M8 R1 R2 R3 C2 C1 - Vin
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ECE142_2010FALL_EXAM1__[0] - ECE142A Mid-Term Examination...

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