7.118 The NMOS transistor in the CS amplifier shown in Fig. P7.118 has Vt = 0.7 V and VA = 50 V. (a) Neglecting the Early effect, verify that the MOSFET is operating in saturation with ID = 0.5 mA and VOV = 0.3 V. What must the MOSFET’s k n be? What is the dc voltage at the drain? (b) Find Rin and Gv. (c) If vsig is a sinusoid with a peak amplitude vˆsig, find the maximum allowable value of vˆ sig for which the transistor remains in saturation. What is the corresponding amplitude of the output voltage?

118 1 - 7.118 The NMOS transistor in the CS amplifier shown in Fig. P7.118 has Vt = 0.7 V and VA = 50 V. (a) Neglecting the Early effect, verify that the MOSFET is operating in saturation with ID = 0.5 mA and VOV = 0.3 V. What must the MOSFET’s k n be? What is the dc voltage at the drain? (b) Find Rin and Gv. (c) If vsig is a sinusoid with a peak amplitude vˆsig, find the maximum allowable value of vˆ sig for which the transistor remains in saturation. What is the corresponding amplitude of the output voltage?

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images - 7.118 The NMOS transistor in the CS amplifier shown in Fig. P7.118 has Vt = 0.7 V and VA = 50 V. (a) Neglecting the Early effect, verify that the MOSFET is operating in saturation with ID = 0.5 mA and VOV = 0.3 V. What must the MOSFET’s k n be? What is the dc voltage at the drain? (b) Find Rin and Gv. (c) If vsig is a sinusoid with a peak amplitude vˆsig, find the maximum allowable value of vˆ sig for which the transistor remains in saturation. What is the corresponding amplitude of the output voltage?

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