Part I Amplifiers Configuration A P Identify The Amplifier Configuration Used In Each Stage Of The Amplifier B P 1 (29.26 KiB) Viewed 51 times
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Part I Amplifiers Configuration A P Identify The Amplifier Configuration Used In Each Stage Of The Amplifier B P 2 (23.38 KiB) Viewed 51 times
PART I (Amplifiers configuration) a) [P] Identify the amplifier configuration used in each stage of the amplifier. b) [P,C] what are the functions of C1, C2, C3, C4, and C5 capacitors? c) [P,C] Explain what are the purposes of each amplifier, and can a single-stage transistor amplifier (say stage 1 or 2 or 3) be used instead? [Hint: what are the requirements of voltage amplifiers in terms of input and output resistance? Remember the non-inverting amplifier (the last stage) in Fig. 1 is a voltage amplifier [6 marks] [6 marks] [3 marks]
The three-stage amplifier consists of one n-channel MOSFET transistor M1 in depletion mode with W/L = 1 and two BJT transistors Q1 and Q2. The transistors have the model parameters as provided in the table below Transistor Parameters M1 K₁ = 10mA/V²| VIN=-2V Q2 B=150 Q3 B=80 VA = 80V VA = 60V λ=0.02V-¹ VBE = 0.7V VBE = 0.7V Cgs = 3.5pf, Cgd = 0.1pf f₁= 2GHz, C₁= 0.2pf fT2GHz, Cu= 0.2pf
R₂ 10K C₁ 10μF RG 1M V₂ RD2 0.62K www M₁ R$1 0.2K R₁ 78K 10μF R₂ 22K C₂ 10μF www RE₂ 1.6K Rc₂ 4.7K R3 91K Q2 C5 10μF R4 120K -C4 10μF www Q3 RE3 3.3K Fig. 2: A three-stage transistor amplifier +15V C610μF R₁ 0.25K
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