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For the MOSFET amplifier circuit shown below, ID1

For the MOSFET amplifier circuit shown below, ID1

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For the MOSFET amplifier circuit shown below, ID1

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(40 points) MOSFET Amplifiers. a. (10 points) For the MOSFET amplifier circuit shown below, draw and label a small signal equivalent circuit. In your small signal equivalent circuit, include coupling capacitors CG1, C12, and CS2 and the Cgd and Cgs of each transistor. b. (10 points) For the ampifier in part a, the current sources have a Norton resistance of 8K Ohms. The load is 5K Ohms. Find the midband voltage gain Av. For transistor M1 ro = 12KOhms ID = 2mA VGS = 0.8V For transistor M2 ro = 10KOhms ID = 1.8mA VGS = 0.7V c. For the small signal equivalent circuit shown below, find the poles of the circuit. You may use Miller's approximation. d. For a step function for the input voltage in the switching MOSFET circuit shown below, estimate the time it takes for vgs to rise to 4.8 Volts. The transistors are a CMOS pair with Cgs = 1.0 nF for the NMOS and Cgs = 0.5 nF for the PMOS. Cgd is too small to be significant for this calculation.
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For the two-stage n-MOSFET amplifier circuit shown below, assume that K′ = 1mA/V2 and VT = 1V for all MOSFETs. (a) Find the DC voltages VIN, VOUT1 and VOUT2 . (b) Draw the small-signal model for the circuit assuming a small signal source is applied at the node marked vIN. Find the small signal voltage gains: A1 = vout1/vin; A2 = vout2/vout1; ATotal = vout2/vin . (c) What is the small-signal input resistance, rin?
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