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For three different MOSFET amplifies shown below, all small signal parameters are same as gm = 0.85 mA/V, ro = 80 kohm, figure out the Ro and Av = vo/vi for the three different cases.

For three different MOSFET amplifies shown below, all small signal parameters are same as gm = 0.85 mA/V, ro = 80 kohm, figure out the Ro and Av = vo/vi for the three different cases.

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For three different MOSFET amplifies shown below, all small signal parameters are same as gm = 0.85 mA/V, ro = 80 kohm, figure out the Ro and Av = vo/vi for the three different cases.

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A common-source amplifier is shown below. The MOSFET parameters are k'n = 2mA/V2, VT = 0.8 V. The amplifier is biased with a source VDD = 5 V, and resistors RD = 4 kohm, RS = 1 kohm, RG1 = 225 kohm, RG2 = 175 kohm, Vov = 0.75 V (a) Calculate the drain current ID. Recall the formula for a MOSFET in saturation: ID = 1/2k'n(VGS - VT)2 (b) Obtain the MOSFET voltage vDS. (c) Using small-signal analysis, obtain the voltage gain vo/vi for RL = 12 kohm. Assume ro = 100 kohm, gm = 1 mA/V.

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Electronics 2 - Homework 2 Second semester 2023-2024 Solve the following questions, and verify your solution using LTSpice. simulation. For each question you need to:Solve the question by handProvide a screenshot of the circuitProvide a screenshot confirming the hand calculations Note that you can change the BJT parameter Beta by adding a SPICE directive and changing the parameter BF Question 1: BJT transistors The parameters for each transistor in the figure below are β = 80, and VBE(m) = 0.7 V. Determine all the voltages and currents in the circuit. Circuit for question 1 Question 2: Amplifier Configurations The signal source in the circuit below is vs = 5 sin⁡(100000πt)mV. The transistor parameters are β = 120, and the capacitors are 10 μF (a) Design the circuit such that IC = 0.25 mA and VCE = 3 V. (b) Find the open circuit voltage gain Avo (c) Find the input resistance Rin (from the base of the transistor) (d) Find the output resistance (e) Use the amplifier model (Avo, Rin, Ro) to find vo(t). Circuit for question 2 Question 3: Amplifier Configurations Consider the circuit shown. The transistor current gain β = 180. and the source signal has a frequency of 100 kHz and the capacitors are 10 μF Note that the current source is replaced by an open circuit in the small signal model equivalent circuit. Determine: (a) the voltage gain from source to load, (b) the input resistance seen by the source (c) the output resistance

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Consider the small signal equivalent circuit of a MOSFET amplifier shown above. The parameters are given to be: R1 = 300 Kohm, R2 = 109 kohm, RD = RL = 5 Kohm, Rsig = 2 kohm, gm = 5.0 mA/V, kn' = 797 uA/V2, W = 56 um, L = 22 um and |VA| = 100 V, If the DC drop across the Gate-Source terminals, VGS = 4.0 V, find the Threshold Voltage (Vt) of the MOSFET (express the result in Volts, for example as 0.8 V )
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