ECE102_W09_Quiz3

# ECE102_W09_Quiz3 - v 1 to v 2 For this part you may assume...

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ECE102 Quiz 3 – Question Pages Winter 2009 1 Student ID Name (Last, First) Question 1 (1 + 5 = 6 points): Consider the circuit shown on the right. Voltage v in2 is the small signal input, and V IN1 is the input bias. For the BJT, | V A | = and β = 4. (a) What is the name of this configuration? (b) Design this amplifier such that: 1. The V OUT bias is between 5 V and 10 V. 2. The small signal gain | v out /v in2 | is maximized. 3. The bias collector current I C of the BJT is 8 mA. 4. The bias voltage drop over R E is 2 V. This means that you need to select the appropriate input bias voltage V IN1 and resistor values R C and R E . Question 2 (3 + 2 + 5 = 10 points): (a) If R = 0, find the bias value of V 1 . (b) What is the largest value R can take for the MOSFET to be in saturation? (c) If R = 100 , find the small signal gain from

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Unformatted text preview: v 1 to v 2 . For this part, you may assume g m = 4 mS and r o = ∞ . Write your answers on the separate answer pages; we will not look at these question pages. v out R C 15 V v in2 V IN1 ~ R E 3 k Ω R V 1 10 V 1 mA 1 k Ω 10 V V thp = -1 V k p ’ = 10-3 A/V 2 λ = 0 W = 2 µ m L = 1 µ m V 2 ECE102 Quiz 3 – Question Pages Winter 2009 2 Question 3 (2 + 2 + 2 = 6 points): Assume the MOSFETs are biased such that they are in saturation. (a) What is the small signal gain from v in to v 1 ? (b) What is the small signal gain from v in to v 2 ? (c) What is the small signal gain from v in to v 3 ? Q1 For Q1: g m = 1 mA/V r o = ∞ For Q2: g m = 2 mA/V r o = ∞ 10 V v in ~ 10 V 10 V 5 V 1 k Ω 3 k Ω 1 k Ω 1 mA 3 k Ω 4 k Ω 1 mA 1 k Ω v 3 v 1 v 2 Q2...
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ECE102_W09_Quiz3 - v 1 to v 2 For this part you may assume...

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