7. d the number of permutation of the letters x, x, y, y, z, z so that no x appears in the firs positions, no y appears in the third position and no z appears in the fifth and sixth positions. [15%]

1.(20%) Figure 1 shows the CS amplifier. The threshold voltage of transistor is -0.5 V. (a) Select a value for Rs to bias the transistor at ID = 0.4 mA and IVovl = 0.4 V. Assume Vsig to have a zero DC component. (b) Select value for Ro that results in vo/vsig = -8 V/V. (c) Find the largest sinusoid Voie peak that the amplifier can handle while remaining in the saturation region. (d) If to obtain reasonably linear operation, Vsig peak is limited to 40 mV, what value can RD be increased to while maintaining saturation-region operation? (5%*4)

7. d the number of permutation of the letters x, x, y, y, z, z so that no x appears in the firs positions, no y appears in the third position and no z appears in the fifth and sixth positions. [15%]

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