The NMOS transistor in the CS amplifier shown in Fig. P7.118 has Vt = 0.7 V and VA = 50
Chapter 7, Problem 7.118(choose chapter or problem)
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 MOSFETs kn be? What is the dc voltage at the drain? (b) Find Rin and Gv . (c) If vsig is a sinusoid with a peak amplitude vsig, find the maximum allowable value of vsig for which the transistor remains in saturation. What is the corresponding amplitude of the output voltage?5 V 300 k 120 k 5 k 2 k 5 k 200 k vsig vo Rin Figure P7.118 (d) What is the value of resistance Rs that needs to be inserted in series with capacitor CS in order to allow us to double the input signal vsig ? What output voltage now results?
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