申論題

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 I_D = 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 R_D be increased to while maintaining saturation-region operation? (5%*4)