Sol HW2 ECE3220 Electronics II S23

Fill in the table VB VC VE Ic LE I8 fre IT gm 5V Consider the circuit given at the right. 600k 1.5k =0.7, Vauo, B=165) 100uF Vo 1k 100uF a) Perform DC analysis and calculate all VB =? VC:? branch currents, node voltages, and small signal parameters 3K VE=? Rout b) Draw a small-signal equivalent model n Vin Rin 400K c) Calculate Ri, Rout, and Ay=Vou/Vin -5V

Determine in which mode (depletion, enhancement or neither) each D-MOSFET in the figure below.

The n-channel JFET and the D-MOSFET have very similar I-V output characteristics. Which of these two structures can be operated in enhancement mode and why is that possible.

Vin For the circuit shown, draw the corresponding small signal model. Vcc Vcc Vcc W ww|ll. R1 R2 WWW Q1 Q2 Re Idc Vo

circuits by using the small signal models of the transistor. Assume the Early voltage of the transistors are infinitely large. Calculate the small-signal input and output impedances of the following Vcc R1 R1 Rout VB RE Rin R2

Please solve it.

Determine VB, VE, VC, VCE, IB, IE, and IC in Figure. The 2N3904 is a general purpose transistor with a typical BDC 200 Vcc +30 V WWII VCE VB R₁ • 22 ΚΩ IC(mA) Chọn... * Chọn... * IB(UA) Chọn... * IE(MA) Chọn... ◆ Chọn... * Chọn... * Chọn... * VE VC R₂ ´ 10 ΚΩ www Rc 1.0 ΚΩ 2N3904 PDC=200 RE 1.0 ΚΩ

Q-3. Find the drain-source voltage, Vos, for the E- MOSFET circuit given below. The device parameters are: Ioss = 4 mA and Vm = 2 V. +15V Rp- 2k 4M R1 + Vps 2M R2

This graphical solution represents IDss Q-point VGS VP VGG Select one: A. self bias for an n-channel JFET B. fixed-bias configuration for an n-channel JFET. C. voltage-divider bias for an n-channel JFET D. None of the above

Q3) For the regulator circuit shown in figure below, Vin-15 V, Rs-10 2, Vz-9.1 V, VBE=0.8V, and R=40 2. What are the values of output voltage, input current, the load current, and collector current. 102016 2-8594 Vin R$ Ⓡ R₂ Vout

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Using LTSpice, simulate the circuit below, use 2N3904 for the transistor. Part ! DC simulation: Measure VCE and Ic. Use .op for the simulation cmd. Remove all capacitors and input signals first. Part 2 AC simulation: Connect all capacitors now and apply an AC signal at the input with an amplitufe of 1mV and a frequency of 1kHz. Determine the Voltage gain of the circuit by dividing Vo with Vin. Show the output for both the DC and AC analysis. Take a screenshot of the circuit and the output voltages and waveforms. Paste in a word file, write your answers, then save as pdf. 50 kΩ Σ 20 0,5 ΚΩ wwwh 9 Vcc=20 V Ca=1 µF = Cc₂ Cg=50 μF 5.6 kn B=100 Ca IST • 3.3 ΚΩ 5 ΚΩΣ CE

Coonsider the common emitter amplifier shown in figure below. Assume a β of 100, VBE = 0.7V, VT = 25mA and VA = 100V.  Draw an equivalent DC model and determine the rπ, transconductance (gm) and ro.  Draw an equaivalent AC model using the small-signal model Find an expression for vbe and vo in terms of the input voltage

"Below is a small signal equivalent circuit model considering the early effect of the BJT. Find the input resistance, output resistance, and voltage gain." Rout Rc R gm Ube R.R re ± Vi RE Vo