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Consider the circuit configuration of Figure 0.5. a. Write down the equations (and only those) which are needed to determine the voltage at node X. Do NOT plug in any values yet. Neglect short channel effects and assume that λp = 0. b. Draw the (approximative) load lines for both MOS transistor and resistor. Mark some of the significant points. c. Determine the required width of the transistor (for L = 0.25 µm) such that X equals 1.5 V. d. We have, so far, assumed that M1 is a long-channel device. Redraw the load lines assuming that M1 is velocity-saturated. Will the voltage at X rise or fall?

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