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Question 4 has 3 sub-questions focusing on DC biasing and transistor regions of operation. 4a = 5pts, 4b = 15 pts, 4c = 5 pts SHOW YOUR WORK FOR ALL ANSWERS.

b)   For the circuit in Figure 4a, find the transistors’ width-to-length ratios and resistance R required to establish a drain current of 400

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c) What is the output resistance of the closed loop op-amp configuration shown in Figure 2a, seen from node vo?

Consider the closed-loop amplifier configuration shown in Figure 2a, and assume that the op-amp is ideal.                                          Figure 2a   a) Derive an expression for the voltage gain (vo/vi) of the amplifier configuration given in Figure 2a.  Express this voltage gain in terms of R1, R2, R3, etc.

c)  Consider the MOSFET cross-section of Figure 1c below. What type of MOSFET is this and in which region is this MOSFET operating (e.g. saturation, triode, etc) ? HOW do you know this? NOTE: current iD is flowing in this diagram.                                                Figure 1c

Total lung capacity can be exactly calculated.

Identify the type of phonation based on its characteristics

When the diaphragm contracts

Please match the following muscles to the functional descriptions when the muscles are contracted: