EXERCISE PROBLEMEx 4.6: The common-source amplifier in Figure 4.23 has transistor parameters= 40 μA/V², W/L = 40, VTP = −0.4 V, and λ = 0.02 V-1. (a) DetermineIDQ and VSDQ. (b) Find the small-signal voltage gain. (Ans. (a) IDQ = 1.16 mA,VSDQ = 2.29 V; (b) A₁ = -3.68)CCIViwww+3 VRs = 1.2 kRG = 100 k- VoRD = 2 k-3 VFigure 4.23 Figure for Exercise Ex 4.6Cs

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Answered: EXERCISE PROBLEM Ex 4.6: The…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Objective: Determine the small-signal voltage gain of a circuit biased with a constant- current source and incorporating a source bypass capacitor. +5 V Rp = 7 kn For the circuit shown in Figure 4.21, the transistor parameters are: VTN = 0.8 V, K, = 1 mA/V?, and = 0. o vo RG= 200 k2 +Cs lo = 0.5 mA 4 -5 V
Us 1. For the circuit in Figure 6.58, RE = 2 k, R1 = R2 = 50 k and the transistor parameters are ß = 100, VE B(on) = 0.7 V, and VA = 125 V. (a) Determine the small-signal voltage gain Av = vo/vs. (b) Find the resistances Rib and Ro. (Ans. (a) Av = 0.925, (b) Rib = 4.37 k, Ro = 32.0) 3+1= www Vcc= +5 V Rab 1 RE Cc₂ IR₂ bot Vo R₁ = 500 £2 Figure 6.58 Figure for Exercises TYU 6.11.
For the common-source amplifier shown in Figure P4.27, the transistor parameters are VT P = −1.2 V, Kp = 2 mA/V2, and λ = 0.03 V−1. The drain resistor is RD = 4 kOhm. (a) Determine IQ such that VSDQ = 5 V. (b) Find the small-signal voltage gain for RL = ∞. (c) Repeat part (b) for RL = 8 kOhm.
How to calculate the bias resistor of a common emitter amplifier. The design curretn is 0.55mA. Bera is assumed to be 200 and the Vcc = 12V. Note: the bias resistor should be high.
This problem is AC analysis problem. DC analysis is not needed to answer the question. A) Convert this bias circuit into a bypassed common emitter amplifier that has an output across a load resistor (RL). To do this you should draw three capacitors on the figure below, an input voltage source, and any resistors you think that should be added. B) In the space below the figure, Draw the hybrid t model for this amplifier circuit including all voltages and resistors. Label Vi, Vbe, and vo on the model. Assume the capacitors you add act as short circuits at AC. Be sure to include resistors R1, R2, R3, R4, and RL in the hybrid pi model. > When you "verify" a mode of operation you will need to calculate all three voltages (Vc, Ve, VE for BJTS and VG, Vs, Vo for MOSFETS) and show the correct two conditions are satisfied. > Assume Capacitors acts like open circuits at DC and short circuits for AC. 12V Assume the following: o Beta = 100 O VBE = 0.7 o V: (Thermal) = 26 mV o Vr (Threshold) = 2V O…
4.15 For the NMOS common-source amplifier in Figure P4.15, the transistor parameters are: VIN = 0.8 V, K, =I mA/V², and à = 0. The circuit para- meters are VpD = 5 V, Rs = 1 k2, Rp = 4 k2, R = 225 k2. and R2 = 175 k2. (a) Calculate the quiescent values Ipo and Vpso. (b) Deter- mine the small-signal voltage gain for Ri = 00. (c) Determine the value of RL that will reduce the small-signal voltage gain to 75 percent of the value found in part (b). VpD Figure P4.15 ww ww
Electrical Engineering - elctronic material
4.15 For the NMOS common-source amplifier in Figure P4.15, the transistor parameters are: VTN = 0.8 V, K, = 1 mA/V², and 2 = 0. The circuit para- meters are VDD = 5 V, Rs = 1 k2, Rp = 4k2, R1 = 225 k2, and R2 = 175 k2. (a) Calculate the quiescent values Ipo and VpsQ. (b) Deter- mine the small-signal voltage gain for R1 = 0. (c) Determine the value of Rị that will reduce the small-signal voltage gain to 75 percent of the value found in part (b). VDD Rp Rin Cc2 Cci Figure P4.15
a) The transistor amplifier shown in Figure Q4.a needs to operate at the output quiescent voltage of 10V. The DC current gain of the transistor is hFE =100, the collector resistor Rc =2.2 KQQ, and the power supply voltage is Vcc =20V. i. Determine the quiescent collector current and the value of the base resistor RB needed to bias the transistor so it can operate at this quiescent output voltage. ii. What is the main disadvantage of this type of transistor bias?
Why is there a difference in the beta value? (D. C) and the beta (A. C) value in some transistor output characteristic schemes.
b) A common source amplifier circuit based on a single n-channel MOSFET is shown in Figure 4b. Assume that the transconductance gm 60 mS (equivalent to mA / V) and drain source resistance, rps, is so large it may be neglected. Vcc = 15 V 210 kN 5.2 k2 V out Vin 280 kN 3.8 kN GND = 0 V Figure 4b. i) Draw the simplified equivalent circuit, which represents the entire amplifier, including the MOSFET, when operating under small signal conditions in the mid-band frequency range (that is assuming the capacitors are short circuit for a.c. signals). State each parameter and its unit of the ac small signal model of the MOSFET. ii) Calculate the open circuit voltage gain Av = Vout / Vin- iii) The amplifier has a load of 10 kN. Determine the current gain A¡ = iout / iin-

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