Problem Statement: Design a small-signal voltage amplifier that meets the following specifications: 1) Voltage gain of 50 or more 2) Minimum input resistance of 15 k 3) Output resistance less than 100 4) Maximum unclipped output of 2V peak-to-peak 5) Power supply voltage of 9 V and lower current drain from supply voltage 6) A two-stage small-signal amplifier is more cost effective than a three-stage amplifier design Hint: You may use a multi-stage small-signal amplifier to achieve desirable input resistance, voltage gain, output resisntace, etc. A common-emitter amplifier with an emitter resistance RE, but without an emitter by-pass capacitor CE is good for high input resistance, common-emitter amplifier using an emitter by- pass capacitor is good for high voltage gain, and the use of an emitter follower results in a low output resistance.

6) Consider the following multistage amplifier. Draw the corresponding small signal model. Label, Vin, Vo1 and Vo. Do NOT make any approximations. Do NOT perform small signal analysis with this model. Just draw the small signal model. Show your work! Vin Vcc malli Q1 Re1 Vo1 Vcc ww1. Rc2 Q2 Re2 Vo

(1) Describe in detail the relative advantages of Class A and Class B amplifiers. In what types of circuits would Class B be advantageous over Class A (1I) With the aid of signal diagrams, describe two forms of distortion you would expect to observe on an output signal of a Class B amplifier. (III) Describe in circuit terms the advantages of a Class AB amplifier.

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II.The following figure shows a class AB amplifier. (a) Determine the parameters of dc VB (Q1), VB (Q2), VE, ICQ, VCEQ (Q1), VCEQ (Q2). (b) For a 5-Vrms input, determine the power that is provided to the load resistor, and (c) Draw the output signal +Vcc +9 V 1.0kn D: R 5.0 V rms R2 10 kN -Vec

a) List down TWO (2) types of distortion occurs in practical amplifier operation and briefly explain each of them. b) () Discuss THREE (3) characteristics of a Class A power amplifier. (ii) Discuss THREE (3) characteristics of a Class B power amplifier. (iii) List down THREE (3) advantages of class B power amplifier as compared with class A power amplifier's operation.

The figure below shows a direct coupled two-stage amplifier. Determine. (i) d.c. voltages for both stages (VB1, VB2, Vc1, Vc2, VE1 and VE2. voltage gain of each stage and overall voltage gain.

The transistor parameters for the circuit in Figure are B, =B2 = 100, VBE1on) = VBE2ton) = 0.7 V, and %3D VA1 =VA2 =0.Find the small signal voltage gain Av = vo/vs. (Note that V-=0.026 V) Vcc=9 V Rib Q1 Vs 1 ko -Ro 20 V 100 Q -ww

Draw a n-p-n transistor connected in circuit common base (CB).Draw the input current-voltage characteristic, the output current-voltage characteristicsand the graph giving dependence of the output current as function of the input current.Define the amplification gain of this circuit.

Why are the two circuits called inverting and non-inverting amplifier, respectively?

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"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

explain RC coupled amplifier in detail .