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(a) What is the advantage of using MOSFET as compared to BJT at the first stage of multi-stage amplifier?

(a) What is the advantage of using MOSFET as compared to BJT at the first stage of multi-stage amplifier?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Vsis (~ Q3 (a) What is the advantage of using MOSFET as compared to BJT at the first stage of multi-stage amplifier? Rais 600 02 www Z₁ (b) Describe the function of the capacitor for the following condition: (1) (ii) SEEE/SKEE 1073 (c) The transistors parameters in Figure Q.3 are given as follow: BJT (iv) ↑ B-350, VBE 0.7 V, Ic=0.3 mA, VT 26 mV, and ro=00 E-MOSFETk 0.8 mA/V², VT- Vas(T) = 1 V C₁ HE a capacitor between stage 1 and stage 2 of a RC-coupled amplifier. bypass capacitor which is commonly used in small signal amplifier. (i) Draw the ac equivalent circuit at middle frequency for circuit in Figure Q.3 by using hybrid-x model. (ii) Determine the values of Z., Ziz and Zo. (iii) Calculate the gain, v/v, in decibel (dB). Draw and label the waveforms vo when v=2 sin 50t [mV] for one complete cycle. + Roi 50 ΚΩ Vi Ra 6 kn Ro 4.5 k Q₁ Rs 3 kQ C₂ не +15 V DS ↑ 22 R₁ 75 k R₂ 9 kn Figure Q.3 Multistage amplifier circuit Re <5kQ C₁ Q₂ > RE 2kQ Rez 1kQ ← 2₂ -C₁ R₂ 20k2 %
Transcribed Image Text:Vsis (~ Q3 (a) What is the advantage of using MOSFET as compared to BJT at the first stage of multi-stage amplifier? Rais 600 02 www Z₁ (b) Describe the function of the capacitor for the following condition: (1) (ii) SEEE/SKEE 1073 (c) The transistors parameters in Figure Q.3 are given as follow: BJT (iv) ↑ B-350, VBE 0.7 V, Ic=0.3 mA, VT 26 mV, and ro=00 E-MOSFETk 0.8 mA/V², VT- Vas(T) = 1 V C₁ HE a capacitor between stage 1 and stage 2 of a RC-coupled amplifier. bypass capacitor which is commonly used in small signal amplifier. (i) Draw the ac equivalent circuit at middle frequency for circuit in Figure Q.3 by using hybrid-x model. (ii) Determine the values of Z., Ziz and Zo. (iii) Calculate the gain, v/v, in decibel (dB). Draw and label the waveforms vo when v=2 sin 50t [mV] for one complete cycle. + Roi 50 ΚΩ Vi Ra 6 kn Ro 4.5 k Q₁ Rs 3 kQ C₂ не +15 V DS ↑ 22 R₁ 75 k R₂ 9 kn Figure Q.3 Multistage amplifier circuit Re <5kQ C₁ Q₂ > RE 2kQ Rez 1kQ ← 2₂ -C₁ R₂ 20k2 %
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