Question

Question 1: 7.33 +15V 1O MO R-200k 16n 7k MO 7.33 Figure P7.33 shows a discrete-circuit amplifier. The input signal is coupled to the gate through a very large capacitor (shown as infinite). The transistor source is connected to ground at signal frequencies via a very large capacitor (shown as infinite). The output voltage signal that develops at the drain is coupled to a load resistance via a very large capacitor (shown as infinite). All capacitors behave as short circuits for signals and as open circuits for de. (a) If the transistor has V,-1 V, and k, = 4 mAV, verify that the bias circuit establishes Va1.5 V.-0.5 mA. and V+7.0 v. That is, assume these values, and verify that they are consistent with the values of the circuit components and the device parameters (b) Find g and r, if V100 V (c) Draw a complete small-signal equivalent circuit for the amplifier, assuming all capacitors behave as short circuits at signal frequencies (d) Find R.Ju and / Question 2: 7.65 7.65 A CS amplifier utilizes a MOSFET with a,C 400 AV and WIL= 10.It is biased at l,= 320.A and uses R, 10k2. Find R A, and R Also, if a load resistance of 10 k2 is connected to the output, what overall voltage gain G is realized? Now, if a 0.2-V peak sine-wave signal is required at the output, what must the peak amplitude of be? Question 3: 7.71 7.71 A MOSFET connected in the CS configuration has a transconductance g-5 mA/V. When a resistance R, is connected in the source lead, the effective transconductance is reduced to 2 mA/V. What do you estimate the value of R to be? w 5= w

Answer 1

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